STIHL Dealer Pinching the Saw Chain Along the Hand on the Rear Handle, About These Devices

Important Safety Precautions for Chain Saw Users

A. Kickback Safety Precautions take several steps to keep your 6. Follow manufacturer’s cutting jobs free from accident or sharpening and maintenance injury. instructions for the saw chain. !Warning! Kickback may occur when the nose 1. With a basic understanding of 7. Only use replacement bars and or tip of the guide bar touches an kickback, you can reduce or eli- chains specified by the manu- object, or when the wood closes in minate the element of surprise. facturer or the equivalent. and pinches the saw chain in the Sudden surprise contributes to cut. Tip contact in some cases may accidents. 8. Reduced kickback bars and low cause a lightning fast reverse kickback chains are designed reaction, kicking the guide bar up 2. Keep a good firm grip on the to reduce the risk of kickback and back towards the operator. saw with both hands, the right injury. Ask your STIHL dealer Pinching the saw chain along the hand on the rear handle, about these devices. top of the guide bar may push the and the left hand on the front guide bar rapidly back towards the handle, when the engine is run- B. Other Safety Precautions operator. Either of these reactions ning. Use a firm grip with may cause you to lose control of the thumbs and fingers encircling 1. Do not operate a chainsaw with saw which could result in serious the chainsaw handles. one hand! Serious injury to the personal injury. A firm grip will help you reduce operator, helpers, bystanders, kickback and maintain control or any combination of these Section 5.12 of ANSI B 175.1-1991 of the saw. persons may result from one- sets certain performance and Don’t let go. handed operation. A chainsaw design criteria related to chainsaw is intended to be used with two kickback. STIHL has developed a 3. Make sure the area in which you hands. color code system using green and are cutting is free from obstruc- yellow to help you select a power- tions. Do not let the nose of the 2. Do not operate a chainsaw when head, bar and chain combination guide bar contact a log, branch, you are fatigued. that complies with the kickback or any other obstruction while requirements of the ANSI Standard. you are operating the saw. 3. Use safety footwear; snug-fitting See the sections entitled "Safety clothing; protective gloves; and Precautions" and "Specifications" 4. Cut at high engine speeds. eye, hearing, and head protect- of this manual. ion devices. 5. Do not overreach or cut above Do not rely exclusively upon the shoulder height. safety devices built into your saw. As a chainsaw user, you should continued on the back inside cover Contents

Main Parts of the Saw 2 After Finishing Work 35 This Manual contains operating and Definitions 3 Storing the Machine 35 safety instructions for all STIHL 044 Safety Precautions 4 Air Filter System 36 series power saws. - The Operator 4 HD Filter* 37 Pay special attention to the safety - The Saw 6 Winter Operation 38 precautions outlined on the inside cover - The Use of the Saw 6 Electrically Handle Heating* 38 and on pages 4 to 24. - Maintaining and Storing the Saw 23 Adjusting Carburetor 39 Allow only persons who understand this Mounting the Bar and Chain 25 Motor Management 39 Manual to operate your chainsaw. Tensioning the Saw Chain 26 Spark Arresting Screen in Muffler 40 To receive maximum performance and Checking Chain Tension 26 Checking Spark Plug 40 satisfaction from your STIHL chainsaw, Fuel 26 Replacing Starter Rope and it is important that you read and under- Fueling 27 Rewind Spring 39 stand the maintenance and safety Chain Lubricant 28 Checking and Replacing precautions before using your saw. Filling Chain Oil Tank 28 Chain Sprocket 42 Contact your STIHL dealer or the Checking Chain Lubrication 28 Ordering Spare Parts 43 STIHL distributor for your area if you do Chain Brake 29 Maintaining and Sharpening not understand any of the instructions in Information Before You Start 30 Saw Chain 44 this Manual. Starting 30 Maintenance Chart 47 Oil Quantity Control 33 Specifications 48 Taking Care of Guide Bar 34 STIHL Incorporated Federal Emission !Warning! During Break- in Period 34 Control Warranty Statement 49 Because a chainsaw is a high-speed During Operation 35 wood-cutting tool, some special safety precautions must be observed as with any other power saw to reduce the risk of personal injury. Careless or improper use may cause serious or even fatal injury.

STIHL’s philosophy is to continually improve all of its products. As a result, engineering changes and improvements are made from time-to-time. If the operating characteristics or the Printed on chlorine-free paper appearance of your saw differs from those described in this Manual, Printing inks contain vegetable oils, please contact your STIHL dealer for paper is recyclable informations and assistance.

2000 Andreas Stihl AG & Co., Waiblingen

0458 132 3021. M10. F0. Fi. Printed in Germany * Special equipment

044 1 Main Parts of the Saw

1 = Twist lock 2 = Spark plug boot 3 = Chain sprocket cover 4 = Chain sprocket 5 = Chain brake 6 = Chain catcher 2 7 = Chain tensioner 8 = Bumper spike 1 9 = Guide bar 10 = Oilomatic saw chain 5 8 4 7 9 10

3 TR 6

139BA012

11 = Oil filler cap 12 = Muffler 13 = Front hand guard 14 = Front handle (handlebar) 13 14 15 = Starter grip 16 = Master Control lever 17 = Fuel filler cap 18 = Throttle trigger 15 19 = Throttle trigger interlock 20 = Rear handle 21 = Rear hand guard 12 19 16

18 20 11 17 21

143BA033

2 044 Definitions

1. Carburetor Box Cover Twist Lock 11. Oil Filler cap 20. Rear Handle Lock for carburetor box cover. For closing the oil tank. The support handle for the right hand, located at or toward the 2. Spark Plug Boot 12. Muffler rear of the saw. Connects the spark plug with the Reduces engine exhaust noise and ignition wire. directs the exhaust gases. 21. Rear Hand Guard Gives added protection to 3. Chain Sprocket Cover 13. Front Hand Guard operator’s right hand. Covers the clutch and the sprocket. Provides protection against projecting branches and helps Guide Bar Nose 4. Chain Sprocket prevent left hand from The exposed end of the guide bar. The toothed wheel that drives the touching the chain if it slips off (not illustrated, see chapter saw chain. the handle bar. It also serves as the “Tensioning the Saw Chain”). 5. Chain Brake lever for chain brake activation. A device to stop the rotation of the Clutch chain if activated in a kickback 14. Front Handle Couples engine to chain sprocket situation by the operator’s hand or Handle bar for the left hand at when engine is accelerated beyond by inertia. front of saw. idle speed. (not illustrated). 6. Chain Catcher 15. Starter Grip Helps to reduce the risk of operator The grip of the starter, for starting Anti-Vibration System contact by a chain when it breaks the engine. The anti-vibration system includes or comes off the bar. a number of buffers designed to 16. Master Control Lever reduce the transmission of vibrations 7. Chain Tensioner Lever for choke control, starting created by the engine and cutting Permits precise adjustment of chain throttle, run and stop switch position. attachment to the operator’s hands. tension. (not illustrated). 17. Fuel Filler Cap 8. Bumper Spike For closing the fuel tank. Toothed stop for holding saw steady against wood. 18. Throttle Trigge. Controls the speed of the engine. 9. Guide Bar Supports and guides the saw chain. 19. Throttle Trigger Interlock Must be depressed before the 10. Oilomatic Saw Chain throttle trigger can be activate. A loop consisting of cutters, tie straps and drive links.

044 3 Safety Precautions

The use of any chainsaw Have your STIHL dealer show you how Safe use of a chainsaw involves may be hazardous. to operate your chainsaw. Observe all The saw chain has many applicable local safety regulations, 1. the operator sharp cutters. If the standards and ordinances. 2. the saw cutters contact your flesh, 3. the use of the saw. they will cut you, even if the chain is not moving. At full throttle, the chain speed !Warning! can reach 45 mph (20 m/s). It is impor- Minors should never be allowed to use a THE OPERATOR tant that you read, fully understand chainsaw. Bystanders, especially and observe the following safety precau- children, and animals should not be Physical Condition tions and warnings. Read the Owner’s allowed in the area where a chainsaw is Manual and the safety instructions in use. Never let the saw run unattended. You must be in good physical condition periodically. Store it in a locked place away from and mental health and not under the children and empty the fuel tank before influence of any substance (drugs, Pay special attention to the section on storing for longer than a few days. alcohol) which might impair vision, reactive forces. dexterity or judgment. Do not lend or rent your chainsaw without the Do not operate a chainsaw when you are !Warning! Owner‘s Manual. Be sure fatigued. Be alert – If you get tired while Reactive forces, including kickback, can that anyone using your operating your chainsaw, take a break. be dangerous. Careless or improper use saw reads and under- Tiredness may result in loss of control. of any chainsaw may cause serious or stands the information contained in this Working with any chainsaw can be fatal injury. manual. strenuous. If you have any condition that might be aggravated by strenuous work, All safety precautions that are generally These safety precautions and warnings check with your doctor before operating observed when working with an ax or a apply to the use of all STIHL chainsaws. a chainsaw. hand saw also apply to the operation of Different models may have different chainsaws. However, because a chain- parts and controls. See the appropriate saw is a high-speed, fast-cutting power section of your Owner’s Manual for a !Warning! tool, special safety precautions must be description of the controls and function Prolonged use of chainsaws (or other observed to reduce the risk of personal of the parts of your model saw. machines) exposing the operator to injury. vibrations may produce whitefinger disease (Raynaud’s phenomenon) or carpal tunnel syndrome. These conditions

4 reduce the hand’s ability to feel and – Keep the saw chain sharp and the Clothing must be sturdy regulate temperature, produce numb- saw, including the AV system, well and snug-fitting, but allow ness and burning sensations and may maintained. A dull chain will in- complete freedom of cause nerve and circulation damage and crease cutting time, and pressing a movement. Avoid loose- tissue necrosis. dull chain through wood will in- fitting jackets, scarfs, crease the vibrations transmitted to neckties, jewelry, flared or cuffed pants, All factors which contribute to whitefinger your hands. A saw with loose com- unconfined long hair or anything that disease are not known, but cold weather, ponents or with damaged or worn could become entangled with the saw or smoking and diseases or physical condi- AV buffers will also tend to have brush. Wear overalls or jeans with a tions that affect blood vessels and blood higher vibration levels. reinforced cut retardant insert or cut transport, as well as high vibration levels retardant chaps. and long periods of exposure to vibration – Maintain a firm grip at all times, but are mentioned as factors in the develop- do not squeeze the handles with Protect your hands with ment of whitefinger disease. In order to constant, excessive pressures. gloves when handling reduce the risk of whitefinger disease Take frequent breaks. saw and saw chain. and carpal tunnel syndrome, please Heavyduty, nonslip note the following: All the above mentioned precautions do gloves improve your grip not guarantee that you will not sustain and protect your hands. – Many STIHL models are available whitefinger disease or carpal tunnel with an anti-vibration (“AV”) system syndrome. Therefore, continual and Good footing is most designed to reduce the transmission regular users should monitor closely the important in chainsaw of vibrations created by the engine condition of their hands and fingers. work. Wear sturdy boots and cutting attachment to the If any of the above symptoms appear, with nonslip soles. operator’s hands. An AV system is seek medical advice immediately. Steel-toed safety boots recommended for those persons are recommended. using chainsaws on a regular or sustained basis. Proper Clothing To reduce the risk of injury to your eyes never operate a chainsaw unless – Wear gloves and keep your hands wearing goggles or properly fitted safety warm. Heated handles, which are !Warning! glasses with adequate top and side available on most STIHL power- To reduce the risk of injury, the operator protection complying with your national heads, are recommended for cold should wear proper protective apparel. standard. weather use.

5 Wear an approved safety THE USE OF THE SAW hard hat to protect your head. Chainsaw noise Transporting the chainsaw may damage your hearing. Always wear sound barriers (ear plugs !Warning! or ear mufflers) to protect your hearing. Always stop the engine before putting a Continual and regular users should have chainsaw down or carrying it. Carrying a their hearing checked regularly. chainsaw with the engine running is extremely dangerous.

THE SAW Accidental acceleration of the engine can cause the chain to rotate. During Parts of the chainsaw; for illustrations operation, the powerhead muffler and and definitions of the parts see the the material around it reach extremely chapter on “Main Parts of Saw”. high temperatures. Avoid touching the hot muffler, you could receive serious burns. !Warning! 001BA027 LÄ Never modify a chainsaw in any way. By hand: When carrying your saw by Only attachments and parts supplied by hand, the engine must be stopped and The chain guard (scabbard) should be STIHL or expressly approved by STIHL the saw must be in the proper position. over the chain and the guide bar, which for use with the specific STIHL saw should point backwards. When carrying models are authorized. Although certain Grip the front handle and place the your saw, the bar should be behind you. unauthorized attachments are useable muffler away from the body. with the STIHL powerhead, their use By vehicle: When transporting in a may, in fact, be extremely dangerous. vehicle, keep chain and bar covered with the chain guard. Properly secure your saw to prevent turnover, fuel spillage and damage to the saw.

6 Preparation for the use of the saw and thereafter at regular intervals (when- Fueling Instructions ever the saw is shut off). If the chain Take off the chain guard and inspect for becomes loose while cutting, shut off the safety in operation. For assembly, follow engine and then tighten. Never try to !Warning! the procedure described in the chapter tighten the chain while the engine is Fuel your chainsaw in well-ventilated “Mounting the Bar and Chain” of your running! areas, outdoors only. Always shut off the Owner’s Manual. engine and allow it to cool before refueling. Gasoline vapor pressure may build STIHL Oilomatic chain, guide bar and Fueling up inside the gas tank of a two cycle sprocket must match each other in engine depending on the fuel used, the gauge and pitch. Your STIHL chainsaw uses an oil-gaso- weather conditions, and the venting line mixture for fuel (see chapter “Fuel” system of the tank. In order to reduce Before replacing any bar and chain, of your Owner’s Manual). the risk of burns or other personal injury see the sections on “Specifications”, from escaping gas vapor and fumes, "Kickback" and the "ANSI B 175.1-1991 remove the fuel filler cap on the STIHL chainsaw kickback standard" in this !Warning! product carefully so as to allow any manual. Gasoline is an extremely flammable fuel. pressure build-up in the tank to release If spilled or ignited by a spark or other slowly. Never remove fuel filler cap while ignition source, it can cause fire and engine is running. !Warning! serious burn injury or property damage. Proper tension of the chain is extremely Use extreme caution when handling Select bare ground for fueling and move important. In order to avoid improper gasoline or fuel mix. at least 10 feet (3 m) from fueling spot setting, the tensioning procedure must before starting the engine. Wipe off any be followed as described in your manual. Do not smoke or bring spilled fuel before starting your saw, and Always make sure the hexagonal nut(s) any fire or flame near the check for leakage. for the sprocket cover is (are) tightened fuel or the chainsaw. securely after tensioning the chain. Note that combustible !Warning! Never start the saw with the sprocket fuel vapors may be vented Check for fuel leakage while refueling cover loose. Check chain tension once from the fuel system. and during operation. If fuel or oil leakage more after having tightened the nut(s) is found, do not start or run the engine until leak is fixed and spilled fuel has been wiped away. Take care not to get fuel on your clothing. If this happens, change your clothing immediately.

7 !Warning! Unit vibrations can cause an improperly tightened fuel filler cap to loosen or come off and spill quantities of fuel. In order to reduce the risk of fuel spillage and fire, tighten fuel filler cap by hand with as much force as possible.

The screwdriver end of the STIHL combination wrench or other similar tool can be used as an aid in tightening slotted fuel filler caps.

Ä Starting The chain brake must be engaged when 143BA019 KN starting the saw. 001BA028 L

With the first method, the chainsaw is The second recommended method for !Warning! started on the ground. Make sure the starting your chainsaw allows you to start Your chainsaw is a one-person saw. chain brake is engaged (see “Chain the saw without placing it on the Do not allow other persons to be near Brake” chapter in your Owner’s Manual) ground. Make sure the chain brake is the running chainsaw. Start and operate and place the chainsaw on firm ground engaged, grip the front handle of the your saw without assistance. For specific or other solid surface in an open area. chainsaw firmly with your left hand. starting instructions, see the appropriate Maintain good balance and secure Keep your arm on the front handle in a section of the Owner’s Manual. Proper footing. locked (straight) position. Hold the rear starting methods reduce the risk of injury. handle of the saw tightly between your Do not drop start. This method is very Grip the front handlebar of the saw firmly legs just above the knees. Maintain good dangerous because you may lose control with your left hand and press down. balance and secure footing. Pull the of the saw. For saws with a rear handle level with starting grip slowly with your right hand the ground, put the toe of your right foot until you feel a definite resistance and then There are two recommended methods into the rear handle and press down. give it a brisk, strong pull. for starting your chainsaw. With your right hand pull out the starter grip slowly until you feel a definite resistance and then give it a brisk, strong pull.

8 Important adjustments To reduce the risk of serious or fatal !Warning! injury from breathing toxic fumes, never Be sure that the guide bar and chain are !Warning! run the chainsaw indoors or in poorly clear of you and all other obstructions To reduce the risk of personal injury from ventilated locations. Ensure proper venti- and objects, including the ground. When loss of control or contact with the lation when working in trenches or other the engine is started, the engine speed running chain, do not use a saw with confined areas. with the starting throttle lock engaged incorrect idle adjustment. At correct idle will be fast enough for the clutch to speed, the chain should not rotate. For engage the sprocket and, if the chain- directions to adjust idle speed, see the !WWarning! brake is not activated, turn the chain. appropriate section of your Owner’s Use of this product (including sharpen- If the upper quadrant of the tip of the bar Manual. If you cannot set the correct idle ing the saw chain) can generate dust, touches any object, it may cause kick- speed, have your STIHL dealer check mists and fumes containing chemicals back to occur (see section on reactive your saw and make proper adjustments known to cause respiratory disease, can- forces). To reduce this risk, always or repairs. cer, birth defects, or other reproductive engage the chain brake before starting. harm. If you are unfamiliar with the risks Never attempt to start the chainsaw After adjusting a chain, start the saw, let associated with the particular dust, mist when the guide bar is in a cut or kerf. the engine run for a while, then switch or fume at issue, consult your employer, engine off and recheck chain tension. governmental agencies such as OSHA Proper chain tension is very important at and NIOSH and other sources on hazar- !Warning! all times. dous materials. California and some When you pull the starter grip, do not other authorities, for instance, have pub- wrap the starting rope around your Working Conditions lished lists of substances known to cause hands. Do not allow the grip to snap cancer, reproductive toxicity, etc. back, but guide the starter rope slowly Operate the chainsaw under good back to permit the rope to rewind visibility and daylight conditions only. Control dust (such as sawdust), mists properly. Failure to follow this procedure (such as oli mist from chain lubrication) may result in injury to hand or fingers !Warning! and fumes at the source where possible. and may damage the starter mechanism. Your chainsaw produces In this regard use good work practices poisonous exhaust fumes and follow the recommendations of as soon as the combusti- OSHA / NIOSH and occupational and ble engine is running. trade associations. When the inhalation These gases (e.g. carbon of toxic dust, mists and fumes cannot be monoxide) may be colorless and odor- less.

9 eliminated, the operator and any by- hot. Don’t work alone. Keep within calling standers should always wear a respirator distance of others in case help is !Warning! approved by NIOSH / MSHA for the type needed. Avoid stumbling on obstacles such as substance at issue. stumps, roots or rocks and watch out for Your chainsaw is equipped with a chain holes or ditches. Clear the area where catcher. It is designed to reduce the risk you are working. Be extremely cautious !Warning! of personal injury in the event of a thrown when working on slopes or uneven Breathing asbestos dust is dangerous or broken chain. From time to time the ground. There is increased danger of and can cause severe or fatal injury, re- catcher may be damaged or removed. slipping on freshly debarked logs. spiratory illness or cancer. The use and To reduce the risk of personal injury, disposal of asbestos containing products do not operate a chainsaw with a have been strictly regulated by OSHA damaged or missing catcher. !Warning! and the Environmental Protection Agen- To reduce the risk cy. Do not cut or disturb asbestos, asbe- Inspect buffers periodically. Replace of serious or fatal stos containing products (e.g. asbestos damaged, broken or excessively worn injury to the opera- containing drywall or other construction buffers immediately, since they may tor or bystanders, products), or products such as pipes result in loss of control of the saw. never use the saw which are wrapped or covered with asbe- with one hand. stos insulation. If you have any reason A “sponginess” in the feel of the saw, You cannot control reactive forces and to believe that you might be cutting asbe- increased vibration or increased you may lose control of the saw, which stos, immediately contact your employer “bottoming” during normal operation can result in the skating or bouncing of or a local OSHA representative. may indicate damage, breakage or the bar and chain along the limb or log. excessive wear. Buffers should always The muffler and other parts of the engine be replaced in sets. If you have any Even for those compact saws designed (e.g. fins of the cylinder, spark plug) questions as to whether the buffers for use in confined spaces, one-handed become hot during operation and remain should be replaced, consult your STIHL operation is dangerous because the hot for a while after stopping the engine. servicing dealer. operator may lose control. To reduce risk of burns do not touch the muffler and other parts while they are !Warning! Take extreme care in wet and freezing weather (rain, snow, ice). Put off the work when the weather is windy, stormy or rainfall is heavy.

10 Ä

001BA087 L 001BA018 LA 001BA018

Cutting Instructions Grip: Always hold the saw firmly with !Warning! both hands when the engine is running. Never touch a chain with your hand or Place your left hand on front handle bar any part of your body when the engine is and your right hand on rear handle and running, even when the chain is not throttle trigger. Left-handers should rotating. The chain continues to rotate Ä follow these instructions too. for a short period after the throttle trigger is released.

Wrap your fingers tightly around the 001BA031 L handles, keeping the handles cradled !Warning! between your thumb and forefinger. Do not cut any material other than wood Never work on a ladder, or on any other With your hands in this position, you can or wooden objects. insecure support. Never use the saw best oppose and absorb the push, pull Use your chainsaw for cutting only. above shoulder height. and kickback forces of your saw without It is not designed for prying or shoveling losing control (see section on reactive away limbs, roots or other objects. forces). Make sure your chainsaw When sawing, make sure that the saw !Warning! handles and grip are in good condition chain does not touch any foreign Never work in a tree unless you have and free of moisture, pitch, oil or grease. materials such as rocks, fences, nails received specific, professional training and the like. for such work, are properly secured (such as tackle and harness system or a !Warning! Such objects may be flung off, damage lift bucket), have both hands free for Do not operate your chainsaw with the the saw chain or cause the saw to operating the chainsaw in a cramped starting throttle lock engaged. Cutting kickback. environment and have taken proper with the starting throttle lock engaged precautions to avoid injury from falling does not permit the operator proper limbs or branches. control of the saw or chain speed. !Warning! In order to keep control of your saw, always maintain a firm foothold.

11 Ä

001BA093 L 001BA082 KN

Position the chainsaw in such a way that powerful force used to cut wood can be your body is clear of the cutting attach- reversed (and work against the opera- ment whenever the engine is running. tor). If the rotating chain is suddenly Stand to the left of cut while bucking. stopped by contact with any solid object like a log or branch or is pinched, the Don’t put pressure on the saw when reactive forces may occur instantly. Ä reaching the end of a cut. The pressure These reactive forces may result in loss may cause the bar and rotating chain to of control which may, in turn, cause pop out of the cut or kerf, go out of serious or fatal injury. An understanding 001BA035 L control and strike the operator or some of the causes of these reactive forces other object. If the rotating chain strikes may helpyou avoid loss of control. The reaction of the cutting force of the some other object, a reactive force may chain causes a rotational force on the cause the moving chain to strike the The most common reactive forces are chainsaw in the direction opposite to the operator. – kickback, chain movement. This may fling the bar – pushback, up and back in an uncontrolled arc – pull-in. mainly in the plane of the bar. Under Reactive forces including kickback some cutting circumstances the bar Kickback: moves towards the operator, who may !Warning! Kickback may occur when suffer severe or fatal injury. Reactives forces may occur any time the the moving saw chain chain is rotating. Reactives forces can near the upper quadrant of Kickback may occur when the nose of be dangerous! In any chainsaw, the the bar nose contacts a the guide bar is pinched unexpectedly, solid object or is pinched. unintentionally contacts solid material in the wood or is incorrectly used to begin a plunge or boring cut.

12 It may also occur during limbing. a) saws with a displacement of less than angles that may occur in real life cutting The greater the force of the kickback 3.8 cubic inches situations. Compliance with § 5.12 of reaction, the more difficult it becomes for – must, in their original condition, ANSI B 175.1-1991 does not automatic- the operator to control the saw. Many meet a 45° computer derived ally mean that in a real life kickback the factors influence the occurrence and kickback angle when equipped with bar and chain will rotate at most 45°. force of the kickback reaction. These certain cutting attachments. include chain speed, the speed at which – and must be equipped with at least the bar and chain contact the object, the two devices to reduce the risk of !Warning! angle of contact, the condition of the kickback injury, such as a chain In order for powerheads below 3.8 cubic chain and other factors. brake, low kickback chain, reduced inch displacement to comply with the kickback bar, etc. computed kickback angle requirements The type of bar and saw chain you use of § 5.12 of ANSI B 175.1-1991 use only is an important factor in the occurrence b) saws with a displacement of 3.8 cubic the following cutting attachments: and force of the kickback reaction. inches and above Some STIHL bar and chain types are – must be equipped with at least one – bar and chain combinations listed as designed to reduce kickback forces. device designed to reduce the risk complying in the “Specifications” STIHL recommends the use of reduced of kickback injury such as a chain section of the Owner’s Manual or kickback bars and low kickback chains. brake, low kickback chain, reduced – other replacement bar and chain kickback bar, etc. combinations marked in accordance with the standard for use on the ANSI B 175.1-1991 chainsaw kickback The computer derived angles for saws powerhead or standard below 3.8 cubic inch displacement are – replacement chain designated measured by applying a computer “low kickback saw chain’’. Section 5.12 of ANSI standard B 175.1– program to test results from a kickback See the section on "Low kickback saw 1991, sets certain performance and test machine. chain and reduced kickback bars" design criteria related to chainsaw kickback. To comply with section 5.12 of ANSI B !Warning! 175.1-1991: The computer derived angles of § 5.12 of ANSI B 175.1-1991 may bear no rela- tionship to actual kickback bar rotation

13 Devices for reducing the risk of kickback injury !Warning! Never operate your chainsaw without a STIHL recommends the use of the STIHL front hand guard. In a kickback situation Quickstop chain brake on your power- this guard helps protect your left hand or head with green labeled reduced kick- other parts of your body. In addition, back bars and low kickback chains. removal of the hand guard on a saw equipped with a chain brake will deactivate the chain brake. !Warning! To reduce the risk of injury, stop using the saw immediately if the chain brake !Warning! does not function properly. Take the saw No Quickstop or other chain brake to your local STIHL Service Centre! Do device prevents kickback. These devices not use the saw until the problem has are designed to reduce the risk of been rectified (see the section “Chain kickback injury, if activated, in certain Brake”). kickback situations. In order for the Quickstop to reduce the risk of kickback

001BA036 LA injury, it must be properly maintained Quickstop chain brake and in good working order. See the When a kickback occurs, the guide bar chapter entitled “Chain Brake” and STIHL has developed a chain stopping may rotate around the front handle. If the “Maintenance, Repair and Storing” of system designed to reduce the risk of cutting position is such that the operator’s your Owner’s Manual. In addition, there injury in certain kickback situations. left hand is gripping the front handle must be enough distance between the It is called a Quickstop chain brake. behind the hand guard, and if the left bar and the operator to ensure that the The Quickstop is available as standard hand rotates around the front handle and Quickstop has sufficient time to activate equipment on your STIHL chainsaw and makes a sufficiently forceful contact with and stop the chain before potential is available for installation on most older the front hand guard, which is the Quick- contact with the operator. STIHL saws. Ask your dealer to retrofit stop activating lever, this contact will your older model saw with a chain brake. activate the Quickstop. The chain brake on most new model STIHL chainsaws can also be activated by inertia. See the chapter entitled “Chain Brake” of your Owner’s Manual.

14 reduce the risk of kickback injury. Other Please ask your STlHL dealer to properly !Warning! chains are designed to obtain higher cut- match your powerhead with the appro- An improperly maintained chain brake ting efficiency or sharpening ease but priate bar/chain combinations to reduce may increase the time needed to stop may result in higher kickback tendency. the risk of kickback injury. Green labeled the chain after activation, or may not bars and chains are recommended for all activate at all. STIHL has developed a color code powerheads. See your “STIHL Bar and system to help you identify the STIHL Chain Information” leaflet for details. !Warning! reduced kickback bars and low kick- Never run the chainsaw above idle back chains. Cutting attachments with speed for more than 3 seconds when green warning decals or green labels on !Warning! the chain brake is engaged or the chain the packaging are designed to reduce Use of other, non-listed bar/chain combi- is pinched or otherwise caught in the cut. the risk of kickback injury. The matching nations may increase kickback forces Clutch slippage can cause excessive of green decaled powerheads under 3.8 and increase the risk of kickback injury. heat, leading to severe damage of the cubic inch displacement with green New bar/chain combinations may be motor housing, clutch and oiler compo- labeled bars and green labeled chains developed after publication of this litera- nent and may interfere with the operation gives compliance with the computed ture, which will, in combination with of the chain brake. If clutch slippage in kickback angle requirements of ANSI B certain powerheads, comply with § 5.12 excess of 3 seconds has occured, allow 175.1-1991 when the products are in of ANSI B 175.1-1991. Check with your the motor housing to cool before pro- their original condition. Products with STIHL dealer for such combinations. ceeding and check the operation of your yellow decals or labels are for users with chain brake as described in the chapter extraordinary cutting needs and entitled “Chain Brake”. Also make sure experience and specialized training for !Warning! that the chain is not turning at idle speed dealing with kickback. Reduced kickback bars and low kickback (see above “Important Adjustments”). chains do not prevent kickback, but they STIHL recommends the use of its are designed to reduce the risk of kick- green labeled reduced kickback bars, back injury. They are available from your Low kickback saw chain and reduced green labeled low kickback chains STIHL dealer. kickback bars" and a STIHL Quickstop chain brake for both experienced and inexpe- STIHL offers a variety of bars and rienced chainsaw users. !Warning! chains. STIHL reduced kickback bars Even if your saw is equipped with a and low kickback chains are designed to Quickstop, a reduced kickback bar and/or low kickback chain, this does not eliminate the risk of injury by kickback. Therefore, always observe all safety precautions to avoid kickback situations.

15 Low kickback chain kickback energy. Improper lowering or To avoid kickback sharpening of the depth gauges or Some types of saw chain have specially shaping of the cutters may increase the The best protection from personal injury designed components to reduce the chance and the potential energy of a that may result from kickback is to avoid force of nose contact kickback. STIHL kickback. Always cut with a properly kickback situations: has developed low kickback chain for sharpened chain. your powerhead. 1. Hold the chainsaw firmly with both hands and maintain a secure grip. “Low kickback saw chain” is a chain Reduced kickback bar 2. Be aware of the location of the guide which has met the kickback performance bar nose at all times. requirements of § 5.12.2.4 of STIHL green labeled reduced kickback 3. Never let the nose of the guide bar ANSI B 175.1-1991 (Safety Require- bars are designed to reduce the risk of contact any object. Do not cut limbs ments for Gasoline-Powered Chain- kickback injury when used with STIHL with the nose of the guide bar. Saws) when tested on a selected repre- green labeled low kickback chains. Be especially careful when cutting sentative sample of chainsaws below small, tough limbs, small size brush 3.8 cubic inch displacement specified in and saplings which may easily catch ANSI B 175.1-1991. !Warning! the chain. When used with other, more aggressive 4 Don’t overreach. chains, these bars may be less effective 5. Don’t cut above shoulder height. !Warning! in reducing kickback, and may result in 6. Begin cutting and continue at full There are potential powerhead and bar higher kickback forces. throttle. combinations with which low kickback 7. Cut only one log at a time. saw chains can be used which have not 8. Use extreme caution when reentering been specifically certified to comply with Bow Guides a previous cut. the 45° computer derived kickback angle 9. Do not attempt to plunge cut if you of § 5.12 of ANSI B 175.1-1991. !Warning! are not experienced with these Some low kickback chains have not Do not mount a bow guide on any cutting techniques. been tested with all powerhead and bar STIHL chainsaw. 10. Be alert for shifting of the log or other combinations. Any chainsaw equipped with a bow forces that may cause the cut to guide is potentially very dangerous. close and pinch the chain. !Warning! The risk of kickback is increased with a 11. Maintain saw chain properly. Cut with A dull or improperly sharpened chain bow guide because of the increased a correctly sharpened, properly may reduce or negate the effects of the kickback contact area. Low kickback tensioned chain at all times. design features intended to reduce chain will not significantly reduce the risk 12. Stand to the side of the cutting path of kickback injury when used on a bow of the chainsaw. guide.

16 Cutting Techniques

Felling

Felling is cutting down a tree.

Ä Before felling a tree, consider carefully all conditions which may affect the direction

001BA037 L 001BA038 L of fall, including:

A = Pull-in: B = Pushback: The intended direction of the fall.

Pull-in occurs when the chain on the Pushback occurs when the chain on the The natural lean of the tree. bottom of the bar is suddenly stopped top of the bar is suddenly stopped when when it is pinched, caught or encounters it is pinched, caught or encounters a Any unusually heavy limb structure. a foreign object in the wood. The reaction foreign object in the wood. The reaction of the chain pulls the saw forward and of the chain drives the saw straight back Surrounding trees and obstacles. may cause the operator to lose control. toward the operator and may cause loss of saw control. Pushback frequently The wind direction and speed. Pull-in frequently occurs when the occurs when the top of the bar is used for bumper spike of the saw is not held cutting. securely against the tree or limb and when the chain is not rotating at full To avoid pushback !Warning! speed before it contacts the wood. Always observe the general condition of 1. Be alert to forces or situations that the tree. Inexperienced users should may cause material to pinch the top never attempt to cut trees which are !Warning! of the chain. decayed or rotted inside or which are Use extreme caution when cutting small leaning or otherwise under tension. size brush and saplings which may easily 2. Do not cut more than one log at a time. There is an increased risk that such trees catch the chain and pull you off balance. could snap or split while being cut and 3. Do not twist the saw when cause serious or fatal injury to the To avoid pull-in withdrawing the bar from a plunge operator or bystanders. Also look for 1. Always start a cut with the chain cut or underbuck cut because the broken or dead branches which could rotating at full speed and the bumper chain can pinch. vibrate loose and fall on the operator. spike in contact with the wood. When felling on a slope, the operator 2. Pull-in may also be prevented by using should stand on the uphill side if wedges to open the kerf or cut. possible.

17 Ä

1 1/2 1 21/2

001BA088 L

Felling Instructions:

When felling, maintain a distance of at least 21/2 tree lengths from the nearest person.

Ä When felling in the vicinity of roads, railways and power lines, etc., take extra

001BA040 L precautions. Inform the police, utility 001BA041 L company or railway authority before beginning to cut. Escape path Buttress roots

!Warning! First clear the tree base and work area If the tree has large buttress roots, cut The noise of your engine may drown any from interfering limbs and brush and into the largest buttress vertically first warning call. clean its lower portion with an ax. (horizontally next) and remove the resulting piece. !Warning! Then, establish two paths of escape (B) There are a number of factors that may and remove all obstacles. These paths affect and change the intended direction should be generally opposite to the plan- of fall, e.g. wind, lean of tree, sloping ned direction of the fall of the tree (A) ground, one-sided limb structure, wood and about at a 45° angle. Place all structure, decay, snow load, etc. To re- tools and equipment a safe distance away duce the risk of severe or fatal injury to from the tree, but not on the escape paths. yourself or others, look for these conditions prior to beginning the cut, and be alert for a change in direction during fall.

18 Ä

001BA042 L 001BA019 KN

Gunning sight Conventional cut Open-face technique

When making the felling notch, use the A = felling notch - determines the A = felling notch - determines the gunning sight on the shroud and housing direction of the fall direction of the fall to check the required direction of fall: For a conventional cut: For an open-face cut: • Position the saw so that the gunning sight points exactly in the • Properly place felling notch • Properly place felling notch direction you want the tree to fall. perpendicular to the Iine of fall, perpendicular to the Iine of falI, close to the ground close to the ground • Cut down at app. 45-degree angle • Cut down at app. 50-degree angle to a depth of about 1/5 to 1/4 of the to a depth of app.1/5 to 1/4 of the trunk diameter trunk diameter • Make second cut horizontal • Make second cut from below at • Remove resulting 45-degree piece app. 40 degree angle • Remove resulting 90-degree piece

19 Ä

Ä Ä

001BA043 L

001BA044 L 001BA045 L

Making sapwood cuts B = Felling cut C = Hinge Conventional and open-face technique: • Helps control the falling tree • For medium sized or larger trees • Begin 1 to 2 inches higher than • Do not cut through the hinge - make cuts at both sides of the trunk, center of felling notch you could lose control of the • at same height as subsequent • Cut horizontalIy towards the felling direction of the fall felling cut. notch • Cut to no more than width of guide • Leave approx.1/10 of diameter uncut. !Warning! bar. This is the hinge In order to reduce the risk of personal • Do not cut through the hinge – injury, never stand directly behind the This is especially important in soft you could lose control of the tree when it is about to fall, since part of wood in summer - it helps prevent direction of the fall the trunk may split and come back sapwood splintering when the tree Drive wedges into the felling cut where towards the operator (barber-chairing), falls. necessary to control the fall. or the tree may jump backwards off the stump. Always keep to the side of the !Warning! falling tree. When the tree starts to fall, If the tip of the bar contacts a wedge, withdraw the bar, shut off the engine and it may cause kickback. Wedges should walk away on the preplanned escape be of wood or plastic – never steel, path. Watch out for falling limbs. which can damage the chain.

20 Ä

Ä Ä

001BA047 L

001BA046 L 001BA048 L

Felling cut for large diameter trees: Avoid repositioning the saw more than !Warning! necessary. When repositioning for the Be extremely careful with partially fallen !Warning! next cut, keep the guide bar fully engaged trees which are poorly supported. Felling a tree that has a diameter greater in the kerf to keep the felling cut straight. When the tree hangs or for some other than the length of the guide bar requires If the saw begins to pinch, insert a reason does not fall completely, set the use of either the sectioning felling cut or wedge to open the cut. On the last cut, saw aside and pull the tree down with a plunge-cut method. These methods are do not cut the hinge. cable winch, block and tackle or tractor. extremely dangerous because they If you try to cut it down with your saw, involve the use of the nose of the guide you may be injured. bar and can result in kickback. Only Plunge-cut method properly trained professionals should Felling cut for small diameter trees: attempt these techniques. Timber having a diameter more than simple fan cut twice the length of the guide bar requires Sectioning method the use of the plunge-cut method before Engage the bumper spikes of the chain- For the sectioning method make the first making the felling cut. saw directly behind the location of the part of the felling cut with the guide bar intended hinge and pivot the saw around fanning in toward the hinge. Then, using this point only as far as the hinge. The the bumper spike as a pivot, reposition bumper spike rolls against the trunk. the saw for the next cut.

21 If you are inexperienced with a chainsaw, plunge-cutting should not be attempted. Seek the help of a professional.

Ä Limbing Limbing is removing the branches from a fallen tree.

001BA089 L !Warning! First, cut a large, wide felling notch. There is an extreme danger of kickback Make a plunge cut in the center of the during the limbing operation. Do not notch. work with the nose of the bar. Be extremely cautious and avoid contacting the log or The plunge cut is made with the guide other limbs with the nose of the guide bar. bar nose. Begin the plunge cut by Ä applying the lower portion of the guide Do not stand on a log while limbing it – bar nose to the tree at an angle. Cut until you may slip or the log may roll. the depth of the kerf is about the same as 001BA033 L the width of the guide bar. Next, align Start limbing by leaving the lower limbs to the saw in the direction in which the support the log off the ground. When Bucking recess is to be cut. underbucking freely hanging limbs, Bucking is cutting a log into sections. a pinch may result or the limb may fall, With the saw at full throttle, insert the causing loss of control. If a pinch occurs, !Warnings! guide bar in the trunk. stop the engine and remove the saw, 1. When bucking, do not stand on the by lifting the limb. log. Make sure the log will not roll Enlarge the plunge cut as shown in downhill. If on a slope, stand on the illustration. !Warning! uphill side of the log. Be extremely cautious when cutting Watch out for rolling logs. !Warning! limbs or logs under tension (spring poles). There is an extreme danger of kickback The limbs or logs could spring back at this point. Extra caution must be taken toward the operator and cause loss of to maintain control of the saw. To make control of the saw and severe or fatal the felling cut, follow the sectioning injury to the operator. method described previously.

22 MAINTENANCE, REPAIR AND STORING

Maintenance, replacement, or repair of the emission control devices and systems may be performed by any nonroad engine repair establishment or individual. However if you claim warranty for a component which has not been serviced or maintained properly or if nonapproved replacement parts were used, STIHL may deny warranty.

Never operate a chainsaw that is Ä Ä damaged, improperly adjusted or not completely or securely assembled. Follow the maintenance and repair 001BA051 L 001BA050 L instructions in the appropriate section of your Owner’s Manual, especially those 2. Cut only one log at a time. 5. Logs under strain: Risk of pinching! in the chapters “Mounting the Bar and Always start relieving cut (1) at Chain”, “Maintaining and Sharpening” 3. Shattered wood should be cut very compression side (A). and “Chain Brake”. carefully. Sharp slivers of wood Then make bucking cut (2) at may be caught and flung in the tension side (B). direction of the operator of the saw. If the saw pinches, stop the engine !Warning! and remove it from the log. Use only STIHL replacement parts for 4. When cutting small logs, place log maintenance and repair. Use of parts through “V” - shaped supports on 6. Only properly trained professionals manufactured by others may cause top of a sawhorse. Never permit should work in an area where the serious or fatal injury. another person to hold the log. logs, limbs and roots are tangled. Never hold the log with your leg or Working in blowdown areas is !Warning! foot. extremely hazardous. Always stop the engine and ensure that the chain is stopped before making any 7. Drag the logs into a clear area before adjustments, maintenance or repair work, cutting. Pull out exposed and cleared logs first.

23 changing the saw chain or cleaning the result. If your muffler was equipped with For the proper and effective operation of saw. Do not attempt any maintenance or a spark-arresting screen to reduce the the chain brake the brake band and repair work not described in your risk of fire (e. g. in the USA, Canada and clutch drum must be kept free of dirt, Owner’s Manual. Have such work perfor- Australia), never operate your saw if the grease and other foreign matter which med at your STIHL service shop only. screen is missing or damaged. Remem- may reduce friction of the band on the ber that the risk of forest fires is greater drum. !Warning! in hot or dry weather. Never test the ignition system with Keep the chain, bar and sprocket clean; For these reasons, each STIHL chain- ignition wire terminal removed from spark replace worn sprockets or chains. saw should be returned to trained plug or with unseated spark plug, since Keep the chain sharp. personnel such as your STIHL servicing uncontained sparking may cause a fire. You can spot a dull chain when easy-to- dealer for periodic inspection and cut wood becomes hard to cut and burn servicing of the brake system according !Warning! marks appear on the wood. to the following schedule: To reduce the risk of fire and burn injury, Keep the chain at proper tension. Tighten Heavy usage - every three months, use only spark plugs authorized by all nuts, bolts and screws except the Moderate usage - twice a year, STIHL. Always press spark plug boot carburetor adjustment screws after each Occasional usage - annually. snugly onto spark plug terminal of the use. proper size. (Note: If terminal has The chainsaw should also be returned detachable SAE adapter nut, it must be !Warning! immediately for maintenance whenever attached.) A loose connection between In order for the chain brake on your the brake system cannot be thoroughly spark plug terminal and ignition wire STIHL chainsaw to properly perform its cleaned or there is a change in its connector in the boot may create arcing function of reducing the risk of kickback operating characteristics. that could ignite combustible fumes and and other injuries, it must be properly cause a fire. Keep spark plug clean, and maintained. Like an automobile brake, For any maintenance please refer to the make sure ignition lead is in good a chainsaw chain brake incurs wear maintenance chart and to the warranty condition. each time it is engaged. statement near the end of this manual. !Warning! The amount of wear will vary depending Additionally, the daily maintenance Do not operate your chainsaw if the upon usage, conditions under which the schedule for your chainsaw set forth in muffler is damaged, missing or modified. saw is used and other factors. Excessive your STIHL Owner’s Manual should be An improperly maintained muffler will wear will reduce the effectiveness of the strictly followed. increase the risk of fire and hearing loss. chain brake and can render it inoperable. Never touch a hot muffler or burn will Store chainsaw in a dry place and away from children. Before storing for longer than a few days, always empty the fuel tank (see chapter "Storing the Machine" in this manual).

24 Mounting the Bar and Chain

3 6 4 4 5 7 001BA091 KN 143BA004 143BA034 KN

• Fit the guide bar over the studs (4) - cutting edges on top of bar must point to right - 1 and engage the peg of the tensioner slide in locating hole (5) - 2 place the chain over sprocket (6) at the same time - 143BA003 KN 145BA001 K 145BA001 • Now turn tensioning screw (7) clockwise until there is very little You can run chains of different pitches Disengage the chain brake: chain sag on the underside of the on this chainsaw - depending on the • Pull hand guard (3) toward the front bar - chain sprocket (see "Specifications") handle. and the drive link tangs are located • Wear work gloves to protect hands in the bar groove. The chain pitch must match the guide • Fit the chain - start at the bar nose. bar. In addition the drive link gauge must • Refit the sprocket cover - match the guide bar groove width. and screw on the nuts only finger-tight. • Unscrew nuts and take off • Tension the chain - see section cover - "Tensioning the Saw Chain"

Turn tensioning screw (1) counterclockwise until the tensioner slide (2) butts against left end of housing slot.

044 25 Tensioning the Saw Chain Checking Chain Tension Fuel

This engine is certified to operate on unleaded gasoline and oil with the mix ratio 50:1.

Your two-stroke engine requires a 1 mixture of brand-name gasoline and quality two-stroke engine oil with the classification TC. 143BA007 KN 133BA024 KN Use regular branded unleaded gasoline Retensioning during cutting work: • Turn off the engine - with a minimum octane rating of • Turn off the engine - • Wear work gloves. 90 ROZ (U.S.A./Canada: pump octane and then slacken the nuts. min. 89!). If the octane number of the Chain must fit snugly against the regular grade gasoline in your area is • Hold the bar nose up - underside of the bar - lower, use premium unleaded fuel. and use screwdriver to turn and, with the chain brake disengaged, it Fuel with a lower octane rating may tensioning screw (1) clockwise until must still be possible to pull the chain result in preignition (causing “pinging”) chain fits snugly against along the bar by hand. which is accompanied by an increase in the underside of the bar - engine temperature. This, in turn, while still holding bar nose up, • If necessary, retension the chain. increases the risk of piston seizure tighten down the nuts firmly. and damage to the engine. • Go to section "Checking Chain A new chain has to be retensioned more Tension". often than one that has been in use for The chemical composition of the fuel is some time. also important. Some fuel additives not only detrimentally affect elastomers • Check chain tension frequently - (carburetor diaphragms, oil seals, fuel see section "During Operation". lines etc.), but magnesium castings as well. This could cause running problems or even damage the engine. For this reason it is essential that you use only branded fuels!

Use only STIHL two-stroke engine oil or equivalent branded two-stroke air- cooled engine oils with the classification TC for mixing.

26 044 Fueling

We recommend STIHL 50:1 two-stroke engine oil since it is specially formulated for use in STIHL engines. Do not use BIA or TCW (two-stroke water cooled) mix oils!

Take care when handling gasoline. Avoid direct contact with the skin and avoid inhaling fuel vapour (see “Safety Precautions”).

The canister should be kept tightly closed in order to avoid any moisture getting into the mixture.

The fuel tank and the canister in which fuel mix is stored should be cleaned from time to time. 143BA009 KN 143BA008 KN

Fuel mix ages: Before fueling, clean the fuel filler cap Change the fuel pick up body every year. Only mix sufficient fuel for a few days and the area around it to ensure that no work, not to exceed 3 months of storage. dirt falls into the tank. Before storing your machine for a long Store in approved safety fuel-canisters Always thoroughly shake the mixture in period, drain and clean the fuel tank and only. When mixing, pour oil into the the canister before fueling your machine. run engine until carburetor is dry. canister first, and then add gasoline. !Warning! Gaso- Oil (STIHL 50:1 or In order to reduce the risk of burns or line equivalent branded TC oils) other personal injury from escaping gas vapor and fumes, remove the fuel filler US gal. US fl.oz cap carefully so as to allow any pressure build-up in the tank to release slowly.

1 2.6 !Warning! 2 1/2 6.4 After fueling, tighten fuel cap as 512.8 securely as possible by hand. Use a suitable tool (e.g. screwdriver end Dispose empty mixing-oil canisters only of combination wrench) to tighten at authorized disposal locations. slotted fuel caps.

044 27 Chain lubricant Filling Chain Oil Checking Chain Lubrication Tank

For automatic and reliable lubrication of the chain and guide bar: Use only a quality, environmentally compatible chain and bar lubricant. STIHL chain lubricant with non-fling additive or the rapidly biodegradable STIHL Bioplus is recommended.

Important: Biological chain oil must be resistant to aging (e.g. STIHL Bioplus) since it will otherwise quickly turn to resin. This results in hard deposits that are difficult to remove, especially in the area of the chain drive, clutch and chain. It may even cause the oil pump to seize.

The service life of the chain and guide bar depends on the quality of the 143BA010 KN lubricant. It is therefore essential to use 143BA024 KN only a specially formulated chain lubricant. • Thoroughly clean the oil filler cap The saw chain must always throw off and the area around it to ensure a small amount of oil. If special chain lubricant is not available, that no dirt falls into the tank. you may - in an emergency - use an HD • Never operate your saw without single grade or multigrade engine oil • Refill the chain oil tank every time chain lubrication. If the chain is run with a viscosity that suits the prevailing you refuel. dry, the whole cutting attachment outside temperature. will be irretrievably damaged within There must still be a small amount of oil a very short time. in the oil tank when the fuel tank is Always check chain lubrication and !Warning! empty. oil level in tank before starting work. Medical studies have shown that If the oil tank is still partly full, the reason renewed contact with waste oil can may be a problem in the oil supply • Every new chain has to be broken cause skin cancer. Avoid direct contact system: in for about 2 to 3 minutes. with waste oil. If waste oil does get on Check chain lubrication, clean the your skin, wash with soap and water. oil passages, contact your STIHL dealer After breaking in chain, check chain Do not use waste oil for any purpose, for assistance if necessary. tension and adjust if necessary - and dispose of it only at authorized see section "Checking Chain disposal locations. Tension".

28 044 Chain Brake

The chain brake is also activated by the inertia of the front hand guard if the kickback force of the saw is high enough: The hand guard is accelerated toward the bar nose - even if your left hand is not behind the hand guard, e.g. during felling cut. The chain brake will operate only if the hand guard has not been modified in any way.

Check operation of chain brake

Before starting work: Run engine at idle speed, engage the chain brake (push hand guard toward bar nose). 143BA012 KN 143BA011 KN Accelerate up to full throttle for no more than 3 seconds - the chain must not Locking chain with chain brake Releasing the chain brake rotate. The hand guard must be free of dirt and move freely. - in an emergency • Pull the hand guard back toward - when starting the front handle. - at idling speed. Chain brake maintenance Note: Always disengage chain brake • The chain is stopped and locked before accelerating engine and before The chain brake is subject to normal when the hand guard is pushed starting cutting work. The only exception wear and tear. It must therefore be toward the bar nose by the left hand - to this rule is when you check operation checked and serviced regularly by or when brake is activated by inertia of the chain brake. High revs with the trained personnel (e.g. STIHL dealer) at in certain kickback situations. chain brake engaged (chain locked) will the following intervals: quickly damage the powerhead and chain drive (clutch, chain brake). Full-time professional users: every 3 months Semi-professional users: every 6 months Occasional users: every 12 months

044 29 Information Before You Start Starting - don’t start the engine yet! -

As soon as engine begins to fire, move the Master Control lever to “Warm Start” position n (2): STOP STOP Choke shutter is open - throttle trigger is in starting-throttle 0 position. If you leave the Master Control lever 1 0 4 in the “cold start” position, the combustion chamber will flood and stall the engine. The Master Control lever must be in 3 “warm start” position to start a warm engine. Also select this 2 2 position if the engine has been running but is still cold. 1 The Master Control lever is locked and can only be moved to the “run” position (3) after squeezing the 144BA020 KN throttle trigger. 143BA017 KN - do not use force - The four positions of the • Observe safety precautions - Master Control lever In the “warm start” position, see section “Safety Precautions”. continue cranking after engine Push hand guard forward (1): To start the engine, move the lever to begins to fire. The chain is now locked - the “cold start” position l (1) - As soon as the engine runs, Press throttle trigger interlock (2) - do not use force. immediately blip the throttle trigger and set Master Control lever to: so that the Master Control lever If the Master Control lever is moves to the “run” position (3). for cold start l in the “run” position # (3): Press down the throttle To turn off the engine: for warm start n trigger interlock and move Move the Master Control lever (even if engine has been running the Master Control downward. upward to “STOP” position but is still cold) “Cold Start” position: $ b (4): Choke shutter is closed - The stop contact should engage throttle trigger is in starting-throttle the contact spring - position. this cuts off the ignition system. This position is used to start a cold engine.

30 044 143BA018 KN 143BA019 KN 143BA020 KN

• Place your saw on the ground - Alternative method of starting: • Pull the starter grip slowly with your make sure you have a firm footing - • Hold the rear handle tightly right hand until you feel it engage - check that chain is not touching any between your legs, just above the and then give it a brisk strong pull object or the ground - knees - and push down the front handle at bystanders must be well clear • Hold the front handle firmly with the same time - of general work area of the saw. your left hand - Do not pull out starter rope more your thumb should be under the than 70 cm (about 28 in) - it might • Hold the saw firmly on the ground handle. otherwise break. with your left hand on the front Do not let the starter grip snap back handle - your thumb should be - guide it slowly and vertically into under the handle. the housing so that the starter rope • Put your right foot into the rear can rewind properly. handle and press down. If engine is new, pull starter grip several times to prime the fuel line.

044 31 STOP

5 001BA100 KN 145BA027 K

• Pull the hand guard back toward • Open throttle slightly - the front handle: = warm up engine for short period. The chain brake is now disengaged • Change over to winter operation if your saw is ready for operation. necessary - see section “Winter 3 Operation”. 4 Always disengage chain brake before accelerating engine and before starting If engine doesn’t start: cutting work. High revs with the chain If you did not move the Master Control 143BA021 KN brake engaged (chain locked) will quickly lever to “Warm Start” n quickly damage the powerhead and chain drive enough after the engine began to fire, When engine begins to fire: (clutch, chain brake). the combustion chamber has flooded. • Move Master Control lever (3) to n and continue cranking - • Observe safety precautions. • Press the throttle trigger interlock as soon as engine runs, • Always check operation of chain and immediately blip the throttle lubrication before starting work. • set the Master Control lever to l trigger (4) - the Master Control lever Turn off engine: “Cold Start” (3) will move to the “Run” # • Move Master Control lever to b • Turn the twist lock above the rear position (5) and the engine settles handle counterclockwise - down to idle speed. At very low outside temperatures: slot vertical - and Allow engine to warm up • lift off the carburetor box cover to As the chain brake is still engaged, the As soon as the engine runs: the rear. engine must be returned to idle speed • Blip the throttle trigger to disengage immediately to avoid damage to the it from starting throttle position - engine and chain drive (clutch, chain Master Control lever will move to brake). normal operating position - engine settles down to idle speed. • Disengage chain brake: Pull hand guard toward front handle - as shown in illustration.

32 044 Oil Quantity Control

1 139BA001 KN

1 145BA011 K 145BA011 132BA001KN

Pull the prefilter (1) upward and out - Different quantities of oil are required for Pull off the spark plug boot (2) - different bar lengths, types of wood and • Unscrew and dry off the spark plug - cutting techniques. • Set the Master Control lever to b • Crank the engine several times Use the adjusting screw (1) to vary the with the starter to clear the oil feed rate as required. combustion chamber - • Refit the spark plug and • Most economic setting - connect the spark plug terminal - turn adjusting screw to "E" reassemble all other parts. (Ematic position). • Set Master Control lever • To increase oil feed - to “Warm Start” n turn adjusting screw clockwise. even if engine is cold. • To reduce oil feed - • Now start the engine. turn adjusting screw counterclockwise. Fuel tank run until dry and then refueled Your chain must always be wetted with • Pull starter rope several times until a film of lubricant. fuel line is primed.

044 33 Taking Care of Guide Bar During Break- in Period

Chain Pitch Minimum A factory new machine should not be type groove run at high revs (full throttle off load) depth for the first three tank fillings. This avoids unnecessary high loads during the 2 Rapid 3/8" 6.0 mm (0.24") break-in period.

If groove depth is less than specified: As all moving parts have to bed in Replace the guide bar. during the break-in period, the frictional resistances in the engine are greater The drive link tangs will otherwise during this period. The engine develops scrape along the bottom of the its maximum power after about 5 to 15 groove - the cutters and tie straps tank fillings. will not ride on the bar rails. Do not make the mixture leaner to achieve an apparent increase in power - this could damage the engine 1 3 - see section "Adjusting Carburetor".

143BA026 KN Note: Always disengage chain brake before accelerating engine and before • Turn the bar over - every time you starting cutting work. High revs with the sharpen the chain - and every time chain brake engaged (chain locked) will you replace the chain - quickly damage the powerhead and this avoids one-sided wear, chain drive (clutch, chain brake). especially at nose and underside of the bar.

Regularly clean 1 = oil inlet hole 2 = oilway 3 = bar groove.

• Measure groove depth - with scale on filing gauge* - at nose of Duromatic bars - in area used most for cutting on Rollomatic bars.

*Special accessory

34 044 During Operation After Finishing Work Storing the Machine

Check chain tension frequently. • Slacken off the chain if you have For periods of about 3 months or longer: A new chain has to be retensioned more retensioned it at operating often than one that has been in use for temperature during cutting work. • Drain and clean the fuel tank in a some time. well ventilated area. The chain contracts as it cools down. • Run engine until carburetor is dry - Chain cold: If it is not slackened off, it could damage this helps prevent the carburetor Tension is correct when chain fits snugly the crankshaft and bearings. diaphragms sticking together. against the underside of the bar and can • Remove the saw chain and guide still be pulled along the bar by hand. Before storing your saw bar, clean them and protect Retension if necessary - for a long period - with corrosion inhibiting oil. see section "Tensioning the Saw Chain". • Thoroughly clean the machine - • See chapter "Storing the Machine". pay special attention to the Chain at operating temperature: cylinder fins and air filter. The chain stretches and begins to sag. • If you use a biological chain lubri- The drive links must not come out of the cant (e.g. STIHL Bioplus), fill the bar groove - the chain may otherwise chain oil tank. jump off the bar. • Store the machine in a dry and high Retension the chain - or locked location - out of the see section "Tensioning the Saw Chain". reach of children and other unauthorized persons. Always slacken off the chain after finishing work. The chain contracts as it cools down. If it is not slackened off, it can damage the crankshaft and bearings.

After long period of full-throttle operation Allow engine to run for a short while at idle speed so that engine heat can be dissipated by flow of cooling air. This protects engine-mounted components (ignition, carburetor) from thermal overload.

044 35 Air Filter System Remove the filter Cleaning Standard Filter

1 145BA027 K 137BA013 KN 137BA011 KN

When there is a noticeable loss of engine power

Oben • Knock the filter out on the palm of 2 TOP HAUT your hand or blow it out with compressed air from the inside outward.

In case of stubborn dirt or sticky filter fabric: 137BA012 KN 145BA028 K • Wash the filter in a fresh, non-flammable solution (e.g. warm soapy The air filter system can be adapted to • Undo the knob above the rear water) and then dry. suit different operating conditions by handle in direction of arrow and • Do not impregnate standard wire simply installing a choice of filters. remove the carburetor box cover. mesh filter with oil.

Standard wire mesh filter (1) (green) for • Pull off the filter. Always replace a damaged filter normal operating conditions and winter element. operation. • Refit the filter.

HD filter (2) (black) for dry and very dusty work areas.

Dirty air filters reduce engine power, increase fuel consumption and make starting more difficult.

36 044 HD Filter*

2 2 1 1 171BA013 KN 145BA030 K 171BA014 KN

Clean the felt prefilter (1) when there is a In case of stubborn dirt or sticky filter • Fit the felt prefilter (1) over the noticeable loss of engine power fabric: HD filter (2) - note correct installed • Wash the filter with STIHL universal position (see ilustration) After cleaning felt prefilter several times: cleaner or in a clean, non-flammable • Install HD filter (with felt prefilter) • Separate the filter components cleaning solution (e.g. warm soapy and carburetor box cover. • Knock out the HD filter (2) and blow water) • Check carburetor setting and it out with compressed air from the Rinse the filter, from the inside readjust if necessary. inside outward outward, under a low-pressure water jet. The felt prefilter helps protect the HD Do not use a high-pressure washer. filter and thus extends its useful life. For this reason the felt prefilter should • Dry all parts of the filter. be replaced at more frequent intervals Do not expose to high than the HD filter. temperatures Always replace a damaged filter.

*Special equipment

044 37 Winter Operation Electrically Handle Heating*

2 K

At temperatures below +10 °C/+50 °F - At temperatures below -10 °C (+14 °F): preheat carburetor as follows: It is advisable to fit the cover plate* on • Remove the carburetor box cover. the fan housing if you use your saw in extremely cold conditions (temperatures Inside the carburetorbox cover: below -10 °C/+14 °F, in powder or • Move shutter (1) from summer drifting snow). position to winter position (2). The cover plate blanks off the lower 145BA015 K Heated air is now drawn in from around slots in the fan housing to help prevent the cylinder and mixed with cold air - snow being sucked into the machine. Switching on electric handle heating* this helps prevent carburetror icing. When the cover plate is fitted, the • Move switch on front handle to # At temperatures above +20 °C/+70 °F: shutter in the carburetor box cover must Return shutter to summer position. be moved to the winter position. • Move switch back to $ This is essential to avoid engine running to switch off heating. problems and overheating. • If your saw is very cold (frost or ice on machine), start the engine and There is no risk of overheating during Machines with HD filter: keep it at a high idle speed (with long periods of operation. chain brake disengaged) until it The whole heating system is • Install a standard filter element in reaches normal operating maintenance-free. place of the HD filter. temperature. • Refit the carburetor box cover and tighten down the knob. In the event of engine running problems, first check that conditions for use of intake air preheating still apply.

*Special accessory *Special equipment

38 044 Adjusting Carburetor

Motor management Setting idle speed

Exhaust emissions are controlled by the It is usually necessary to change the design of the fundamental engine setting of the idle speed adjusting screw parameters and components (LA) after every correction to the low (e.g. carburetion, ignition, timing and H L speed adjusting screw (L). valve or port timing) without the addition H 3 /4 L Engine stops while idling of any major hardware. 1/4

The carburetor is set at the factory to • Turn the idle speed adjusting provide an optimum fuel-air mixture screw (LA) clockwise until under all operating conditions. LA chain begins to run - then back off the screw one quarter It enables your machine to run smoothly, of a turn be fuel efficient, operate reliably and produce low emissions. Chain runs when engine is idling

Standard setting and explanation of • Turn the idle speed adjusting setting pictograms 139BA013 KN screw (LA) counterclockwise until chain stops running - • Check the air filter and clean or Correction of carburetor setting for then turn screw another replace it if necessary higher altitudes quarter turn in the same direction • Check the spark arresting screen and clean or replace it if necessary If the engine runs unsatisfactorily, slight Erratic idling behavior, readjustment may be necessary: poor acceleration Turn the high speed adjusting H screw (H) counterclockwise up to • Check standard setting Idle setting is too lean 3 /4 the stop, i.e. 3/4 turn from max. • warm up the engine lean setting • Turn the low speed adjusting Turn the high speed adjusting screw (L) counterclockwise - Turn the low speed adjusting screw (H) and low speed adjusting no further than stop - L screw (L) clockwise up to the stop screw (L) clockwise (leaner) - until engine runs and accelerates 1/4 - then back off the screw one smoothly - quarter of a turn !Warning! If you make the setting too lean, the maximum permissible engine speed will be exceeded - risk of engine damage.

044 39 Spark Arresting Screen in Checking Spark Plug Muffler

A 145BA043 KN 000BA039 KN

• Use only resistor type spark plugs of the approved range. 1 6 Rectify problems which have caused 5 fouling of spark plug: Incorrect carburetor setting, too much oil in fuel mix, dirty air filter, unfavorable running conditions, e.g. 145BA044 KN operating at part load. 000BA036 TR

If engine is down on power, check the • Fit a new spark plug after Wrong fuel mix (too much engine oil in spark arresting screen in the muffler: approx. 100 operating hours - the gasoline), a dirty air filter and • Allow muffler to cool down. or earlier if the electrodes are unfavorable running conditions (mostly badly eroded. at part throttle etc.) affect the condition of • Take out the four screws. the spark plug. These factors cause • Remove the muffler upper deposits to form on the insulator nose casing (4). !Warning! which may result in trouble in operation. • Bend back the retaining tabs (5). To reduce the risk of fire and burn injury, • Pull out the spark arresting screen use only spark plugs authorized by If engine is down on power, difficult to (6). STIHL (see “Specifications”). Always start or runs poorly at idling speed, • Clean spark arresting screen if press spark plug boot (2) snugly onto first check the spark plug. necessary. If screen is damaged or spark plug terminal (1) of the proper coked up, fit a new one. size. (Note: If terminal has detachable • Remove spark plug - • Refit the spark arresting screen in SAE adapter nut, it must be attached.) see chapter “Starting”: the reverse sequence. A loose connection between spark plug • Clean dirty spark plug. terminal and ignition wire connector in • Check electrode gap - the boot may create arcing that could it should be 0.5mm/0.02" (A) - ignite combustible fumes and cause a readjust if necessary. fire.

40 044 Replacing Starter Rope and Rewind Spring

1 2 3 1 4 4

1 1 001BA096 KN 133BA014 KN

5 2 3 4 4 133BA016 KN 001BA096 KN

• Remove the screws (1) - • Use a screwdriver to pry the rope • Refit the pawls (4) in the rotor - • Push the hand guard upward - out of the starter grip • Fit the washer (3) on the starter post • Pull underside of fan housing away • Remove remaining rope from the • Use screwdriver or suitable pliers from crankcase and remove it rotor and starter grip to install spring clip (2) on starter downward. • Thread the new rope through the post and over the pawl pegs - Use screwdriver or suitable pliers top of the starter grip and then pull the spring clip must point in to carefully remove spring clip (2) through the rope guide bush (5). clockwise direction - from the starter post. • Thread the rope through the rotor see illustration. • Remove the rope rotor and secure it with a simple with washer (3) and pawls (4) overhand knot. Tensioning rewind spring • Coat rope rotor bearing bore with • Make a loop in the unwound starter non-resinous oil. rope and use it to turn the rope rotor • Slide rotor onto starter post - six full revolutions clockwise. turn it back and forth so that anchor • Hold the rotor steady - loop of rewind spring engages - Straighten the twisted rope -

044 41 Checking and Replacing Chain Sprocket

6 001BA104 ST

• Release the rotor - Replacing a broken rewind spring Replace the chain sprocket • Let go of rope slowly so that • Lubricate the new spring with after using two Oilomatic chains it winds onto the rotor. a few drops of non-resinous oil. The starter grip must locate firmly • Remove the rope rotor - or sooner if the wear marks on the in the rope guide bush. see “Replacing Starter Rope” - sprocket are deeper than approx. If the grip droops to one side: 0.5 mm (1/64") since this would reduce Add one more turn on rope rotor Warning: The bits of spring in the fan the life of the chain. to increase spring tension. housing might still be under tension and Check wear marks: • When starter rope is fully extended could fly apart when you take them out Left: on webs of rim sprockets it must be possible to rotate the rotor of the housing. To reduce risk of injury, Right: on teeth of spur sprockets. at least another half turn. If this is wear eye and face protection and work not possible, the spring is over- gloves. You can use gauge* 0000 893 4101 to tensioned and could break. • Use a screwdriver to carefully pry check the depth of the wear marks on Take one turn off the rope. the parts of the spring out of the spur and rim sprockets. • Fit the fan housing on the housing. It is best to use two chains in rotation crankcase. • Place the new spring with retaining with one sprocket. • Set the Master Control lever to d frame in position in the fan housing - • Push the remaining rope into the anchor loop must engage the Before removing chain sprocket the starter grip so that the nipple (6) lug. is flush with the grip. • Apply suitable tools (screwdriver, • Remove chain sprocket cover, punch, etc.) to the recesses chain and guide bar. (arrows) and push the spring into • Disengage the chain brake: its seat - it slips out of the retaining Pull hand guard toward front handle. frame in this process. • Reinstall the rope rotor, tension the rewind spring, fit the fan housing and secure in position.

* Special accessory

42 044 Ordering Spare Parts

Please enter your saw model, machine number as well as the part numbers of the guide bar, saw chain and chain sprocket in the spaces provided. This will make re-ordering simpler. The guide bar, saw chain and chain sprocket are subject to normal wear and tear. The part numbers of the standard bar,

K chain and sprocket are printed for your convenience. When purchasing these Rim sprocket Spur sprocket parts, always quote the saw model, the part numbers and names of the parts. Use a screwdriver to Use a screwdriver to Warranty claims following repairs can be • remove the E-clip. remove the E-clip. • • accepted only if the repair has been • Take off the washer and rim • Pull the washer, spur sprocket and performed by an authorized STIHL servicing sprocket. needle cage off the crankshaft. dealer using original STlHL spare parts. • Examine splines on clutch drum - if wear marks are severe, fit a new Clean the crankshaft stub and Original STIHL parts can be identified by clutch drum: needle cage, and lubricate with the STlHL part number, the logo p and the STIHL parts symbol ( STIHL grease The symbol may appear alone on small Pull clutch drum and needle cage (tube 0781 120 1111). parts. off the crankshaft - clean the crankshaft stub and needle cage, • Reassemble with new spur and lubricate with STlHL grease sprocket - Model (tube 0781 120 1111). After fitting the clutch drum, rotate it about one turn to engage Machine number Reassemble with new rim sprocket oil pump drive - and new clutch drum, if necessary - refit washer and E-clip on the Guide bar part number • fit rim sprocket with cavities facing crankshaft. outward - • refit washer and E-clip on the Use only original STIHL chain Chain part number crankshaft. sprockets to ensure correct operation of the chain brake. Sprocket part number Use only original STIHL clutch drums to ensure correct operation of the chain brake. For recommended STIHL reduced kickback cutting attachments see section "Specifications" of this Owner’s Manual.

044 43 Maintaining and Sharpening Saw Chain

Correctly sharpened chain A A properly sharpened chain slices through wood effortlessly and requires very little feed pressure. 3/8

Do not work with a dull or damaged B chain as it will increase the physical 689BA020 KN effort required, produce unsatisfactory 689BA021 KN results and a higher rate of wear. The chain pitch (e.g. 3/8) is marked on A = Filing angle Clean and check your chain the depth gauge side of each cutter. B = Side plate angle for cracks in the links and damaged rivets - Use only special saw chain files Chain type Angle (°) replace any damaged or worn parts of AB the chain and match the new parts to the Other files have the wrong shape and Rapid-Micro (RM) 30 85 shape and size of the original parts. cut. Rapid-Super (RS) 30 60 Picco-Micro (PM/PMN) 30 85 Important: It is absolutely imperative to Select file diameter according to chain comply with the angles and dimensions pitch - see table at the end of this specified below. If the saw chain is chapter. Cutter shapes: incorrectly sharpened - and in Micro = Semi-chisel particular if the depth gauge is set too You must observe certain angles when Super = Full chisel low - there is a risk of increased resharpening the chain cutters kickback of the chainsaw, with resulting Specified angles A and B are danger of injury. obtained automatically if recommended files or sharpening tools and Select the appropriate sharpening correct settings are used. tools for the chain pitch. See “Technical Data” for the permitted Furthermore, the angles must be the chain pitches. same on all cutters. If angles are uneven: Chain will run roughly, not in a straight line, wear quickly and finally break.

44 • Avoid touching the tie straps and drive links with the file. • Rotate the file at regular intervals while filing - this avoids one-sided wear. 90° • Use a piece of hardwood to remove burrs from cutting edge. • Check angles with the filing gauge. 689BA018 KN 689BA025 KN

As these requirements can be met only File correctly All cutters must be the same length after sufficient and constant practice: • If you use a file holder or the FG 1: If the cutters are not the same length, Use a file holder.* Leave the chain on the bar. they will have different heights. This • Clamp the bar in a vise if necessary. makes the chain run roughly and can A file holder must be used for manual • Lock the chain - push hand guard cause it to break. resharpening of Super chain. The correct forward filing angle is marked on the file holder. • To rotate the chain - pull hand Find the shortest cutter and then file all guard against front handle other cutters back to the same length. • Sharpen chain frequently, take This can be very time consuming - it is away as little metal as possible - best to have it done in the workshop on 90¡ 85¡ 70¡ 60¡ 80¡ two or three strokes of the file are an electric grinder. usually enough • Always file from the inside to the

30¡ 35¡ outside of the cutter. 10¡ 0¡ • The file only sharpens on the forward stroke - 689BA022 KN lift the file off the cutter on the back- stroke. For checking angles • Hold the file horizontally for all STlHL filing gauge* (see table) chain types (at right angle to side of A universal tool for checking the filing guide bar) and file according to the and side plate angles, depth gauge angles marked on the filing tool. setting and cutter length. Also cleans the guide bar groove and oil inlet hole.

* Special accessory

45 Chain Depth gauge pitch distance “a”

a Inch (mm) mm (Inch) 1/4 (6.35) 0.65 (0.026) 3/8-PM (9.32) 0.65 (0.018) 3/8-PMN (9.32) 0.45 (0.026)

0.325 (8.25) 0.65 (0.026) 689BA024 KN 689BA023 KN 3/8 (9.32) 0.65 (0.026) Depth gauge setting 0.404 (10.26) 0.80 (0.031) Round off depth gauges parallel to the stamped marking. The depth gauge determines the height This setting may be increased by 0.2 mm at which the cutter enters the wood and (0.008") for cutting softwood in mild thus the thickness of the chip removed. weather season - no frost. After sharpening Clean the chain thoroughly, remove Distance between depth gauge and Lowering depth gauges filings or grinding dust - lubricate the cutting edge = a: chain by immersing it in an oil bath. The depth gauge setting is reduced when the chain is sharpened. Use filing gauge to check the setting every time Before long out-of-service period you sharpen the chain and, if necessary, Clean the chain with a brush and lower the depth gauge with a flat or immerse it in an oil bath. triangular file so that it is level with the filing gauge.

Sharpening tools

Chain pitch Round file Ø Round file File holder Filing gauge Flat file Sharpening kit* Inch (mm) mm (Inch) Part No. Part No. Part No. Part No. Part No. 1/4 (6.35) 4.0 (5/32) 5605 772 4006 5605 750 4327 1110 893 4000 0814 353 3356 5605 007 1027 3/8 PMN (9.32) 4.0 (5/32) 5605 772 4006 5605 750 4327 0000 893 4000 0814 353 3356 5605 007 1026 3/8 P (9.32) 4.0 (5/32) 5605 772 4006 5605 750 4327 1110 893 4000 0814 353 3356 5605 007 1027 0.325 (8.25) 4.8 (3/16) 5605 772 4806 5605 750 4328 1110 893 4000 0814 353 3356 5605 007 1028 3/8 (9.32) 5.2 (13/64) 5605 772 5206 5605 750 4329 1110 893 4000 0814 353 3356 5605 007 1029 0.404 (10.26) 5.5 (7/32) 5605 772 5506 5605 750 4330 1106 893 4000 0814 353 3356 5605 007 1030

* consisting of file holder with round file, flat file and filing gauge.

46 Maintenance Chart

Please note that the following maintenance intervals apply for normal operating conditions only. If your daily working time is longer than normal or cutting conditions are difficult (very dusty work area tropical wood etc.) shorten the specified intervals accordingly. before starting work after finishing work or daily after each refueling stop weekly monthly if problem if damaged as required see page: Visual inspection (condition leaks) xx Complete machine Clean x Throttle trigger , trigger interlock, xx Check operation Master Control Check operation xx 29 Chain brake Check by STIHL dealer x29 Check x27 Filter in fuel tank Clean, Replace filter element xx Replace xx Fuel tank Clean x26 Chain oil tank Clean x Chain lubrication Check x28 Inspect, also check sharpness xx Saw chain Check chain tension x x 26, 35 Sharpen x44 Check (wear, damage) x34 Guide bar Clean and turn over xx Deburr x Replace xx Chain sprocket Check x42 Clean xxx36 Air filter Replace x36 Cooling inlets Clean x Cylinder fins Clean x Check idle adjustment – chain must not turn xx 39 Carburetor Readjust idle x39 Spark plug Readjust electrode gap x38 All accessible screws and nuts Retighten x (not adjusting screws)* Rubber vibration buffers Have replaced by STIHL dealer x Inspect x Spark arresting screen in muffler Clean or replace xx Check x Chain catcher Replace x

* Tighten down the cylinder base screws firmly after the first 10 to 20 hours of operation.

044 47 Specifications

Engine Cutting Attachment STIHL yellow-labeled bars: Recommended cutting attachments for 3/8" pitch: STIHL single cylinder two-stroke for compliance with § 5.12 of ANSI Rollomatic “S” with sprocket nose engine Standard B 175.1-1991 40, 45, 50, 63, 70, 75, 80 or 90 cm (see page 15 of this Manual): (16, 18, 20, 24, 28, 30, 32 or 36 in) Displacement: 70.7 cm3 (4.31 cu.in) Duromatic with stellite tipped nose Bore: 50 mm (1.97 in) STIHL reduced kickback bar 40, 45, 50 or 63 cm (16, 18, 20 or 24 in) Stroke: 36 mm (1.42 in) (with green label) for 3/8" pitch: Idle speed: 2,500 r.p.m. Rollomatic with sprocket nose STIHL yellow-labeled chains: Maximum engine 40, 45 or 50 cm (16, 18 or 20 in) for 3/8" pitch: speed Topic-Micro (36 TM), (cut-off speed): 13,500 rpm STIHL low kickback chain* Topic-Super (33 TS, 36 TS), (with green label) for 3/8" pitch: Rapid-Micro (33 RM, 36 RM, 33 RMF), 9.32 mm (3/8") Rapid-Micro 2 Rapid-Super (33 RS, 33 RS 1, 36 RS, Ignition System (33 RM 2, 36 RM 2) 36 RS 1, 33 RSL, 36 RSL, 33 RSF, Type: Chain sprocket: 33 RSLF, 36 RSLF, 36 RSLH). Electronic magneto ignition (breakerless) 7-tooth for 3/8" pitch spur sprocket Spark plug (suppressed): Chain sprocket: 8-tooth 3/8" rim sprocket Bosch WSR 6 F or NGK BPMR 7 A In order to comply with the kickback Heat range 200 performance requirements of § 5.12 Electrode gap 0.5 mm (0.02 in) of ANSI Standard B 175.1-1991, *See definition of “low kickback chain” Spark plug thread: M 14x1.25; 9.5 mm do not use replacement saw chain on page 15. (0.37 in) long unless it has been designated as meeting the ANSI § 5.12 requirements Fuel/Oil System on this specific powerhead, or has been Carburetor: All position diaphragm designated as “low kickback” saw chain* carburetor with integral fuel pump in accordance with the ANSI B 175.1- Air filter: Prefilter and bisectional boxfilter 1991 standard. Special accessory: Heavy-duty (HD)-airfilter *See definition of “low kickback chain” on Fuel mix: See chapter “Fuel” page 15 of this Manual. Fuel tank capacity: 0.8 l (1.69 US pt) Oil tank capacity: 0.33 l (0.7 US pt) Since new bar/chain combinations may be developed after publication of this Weight Manual, ask your STIHL dealer for the without bar and chain latest STIHL recommendations. 044: 5.9 kg (13 lb) Other bars and chains available for this 044/W with electrically powerhead are: heated handles: 6.1 kg (13.4 lb)

48 044 STIHL Incorporated Federal Emission Control Warranty Statement

Your Warranty Rights you, including diagnosis (if the As the small off-road equipment engine and Obligations diagnostic work is performed at an owner, you should be aware, however, authorized dealer), parts, and labor. that STIHL Incorporated may deny you The U.S. Environmental Protection warranty coverage if your small off-road Agency (EPA) and STIHL Incorporated equipment engine or a part has failed are pleased to explain the Emission Manufacturer’s Warranty Coverage: due to abuse, neglect, improper mainte- Control System Warranty on your equip- nance or unapproved modifications. ment type engine. In the U.S. new 1997 In the U.S., 1997 and later model year and later model year small off-road small off-road equipment engines are You are responsible for presenting your equipment engines must be designed, warranted for two years. If any emission- small off-road equipment engine to a built and equipped, at the time of sale, to related part on your engine is defective, STIHL service center as soon as a meet the U.S. EPA regulations for small the part will be repaired or replaced by problem exists. The warranty repairs will non road engines. The equipment engine STIHL Incorporated free of charge. be completed in a reasonable amount of must be free from defects in materials time, not to exceed 30 days. and workmanship which cause it to fail to conform with U.S. EPA standards for Owner’s Warranty Responsibilities: If you have any questions regarding the first two years of engine use from the your warranty rights and responsibilities, date of sale to the ultimate purchaser. As the small off-road equipment engine please contact a STIHL customer owner, you are responsible for the service representative at 1-800-467- STIHL Incorporated must warrant the performance of the required mainte- 8445 or you can write to emission control system on your small nance listed in your owner’s manual. off-road engine for the period of time STIHL Incorporated recommends that STIHL Inc., listed below provided there has been no you retain all receipts covering mainte- 536 Viking Drive, P.O. Box 2015, abuse, neglect or improper maintenance nance on your small off-road equipment Virginia Beach, VA 23450-2015. of your small off-road equipment engine. engine, but STIHL Incorporated cannot deny warranty solely for the lack of Your emission control system includes receipts or for your failure to ensure the Coverage by STIHL Incorporated parts such as the carburetor and the performance of all scheduled mainte- STIHL Incorporated warrants to the ignition system. Also included may be nance. ultimate purchaser and each subse- hoses, and connectors and other quent purchaser that your small off-road emission related assemblies. Any replacement part or service that is equipment engine will be designed, built equivalent in performance and durability and equipped, at the time of sale, to Where a warrantable condition exists, may be used in non-warranty mainte- meet all applicable regulations. STIHL STIHL Incorporated will repair your small nance or repairs, and shall not reduce Incorporated also warrants to the initial off-road equipment engine at no cost to the warranty obligations of the engine purchaser and each subsequent manufacturer.

044 49 purchaser that your engine is free from Mechanical diagnostic work will be Where to make a claim for Warranty defects in materials and workmanship performed at an authorized STIHL Service which cause the engine to fail to conform servicing dealer. Emission test may be Bring the product to any authorized with applicable regulations for a period performed either at STIHL Incorporated STIHL servicing dealer and present the of two years. or at any independent test laboratory. signed warranty card.

Maintenance Requirements Warranty Period Warranty Work The maintenance instructions in this The warranty period will begin on the STIHL Incorporated shall remedy manual are based on the application of date the utility equipment engine is warranty defects at any authorized the recommended 2-stroke fuel-oil purchased by the initial purchaser and STIHL servicing dealer or warranty mixture (see also instruction "Fuel"). you have signed and sent back the station. Any such work shall be free of Deviations from this recommendation warranty card to STIHL. If any emission charge to the owner if it is determined regarding quality and mixing ratio of fuel related part on your engine is defective, that a warranted part is defective. Any and oil may require shorter maintenance the part will be replaced by STIHL manufacturer-approved or equivalent intervals. Incorporated at no cost to the owner. replacement part may be used for any Any warranted part which is not warranty maintenance or repairs on Limitations scheduled for replacement as required emission-related parts and must be This Emission Control Systems Warranty maintenance, or which is scheduled only provided without charge to the owner. shall not cover any of the following: for regular inspection to the effect of STIHL Incorporated is liable for damages "repair or replace as necessary" will be to other engine components caused by - repair or replacement required warranted for the warranty period. Any the failure of a warranted part still under because of misuse, neglect or lack of warranted part which is scheduled for warranty. required maintenance, replacement as required maintenance will be warranted for the period of time The following list specifically defines the - repairs improperly performed or up to the first scheduled replacement emission-related warranted parts: replacements not conforming to point for that part. STIHL Incorporated specifications that Carburetor adversely affect performance and/or Choke (Cold start enrichment system) durability, and alterations or Diagnosis Intake manifold modifications not recommended or You, as the owner, shall not be charged Air filter approved in writing by STIHL for diagnostic labor which leads to the Spark plug Incorporated, determination that a warranted part is Magneto or electronic ignition system defective. However, if you claim warranty (ignition module) and for a component and the machine is Catalytic converter (if applicable) tested as non-defective, STIHL Fasteners - replacement of parts and other Incorporated will charge you for the cost services and adjustments necessary of the emission test. for required maintenance at and after the first scheduled replacement point.

50 044 Continuation of Important Safety Precautions

4. Use caution when handling fuel. 10. Do not operate a chainsaw that Manual maintenance instruc- Move the chainsaw at least is damaged, improperly tions, should be performed by 10 feet (3 m) from the fueling adjusted, or not completely and competent chainsaw service point before starting the engine. securely assembled. Be sure personnel. that the saw chain stops (For example, if improper tools 5. Do not allow other persons to moving when the throttle trigger are used to remove the be near the chainsaw when is released. flywheel or if an improper tool starting or cutting with the is used to hold the flywheel in chainsaw. Keep bystanders 11. Shut off the engine before order to remove the clutch, and animals out of the work setting the chainsaw down. structural damage to the area. flywheel could occur and could 12. Use extreme caution when be subsequently cause the 6. Do not start cutting until you cutting small size brush and flywheel to burst). have a clear work area, secure saplings because slender mate- footing, and a planned retreat rial may catch the saw chain 18. When transporting your chain- path from the falling tree. and be whipped toward you or saw, use the appropriate chain pull you off balance. guard (scabbard). 7. Keep all parts of your body away from the saw chain when 13. When cutting a limb that is Other important safety precautions the engine is running. under tension be alert for are contained in the body of the springback so that you will not Owner’s Manual. 8. Before you start the engine, be struck when the tension in make sure that the saw chain the wood fibers is released. is not contacting anything. Note: 14. Keep the handles dry, clean, 9. Carry the chainsaw with the and free of oil or fuel mixture. When using a chainsaw for logging engine stopped, the guide bar purposes, refer to the Code of and saw chain to the rear, and 15. Operate the chainsaw only in Federal Regulations, Parts 1910 the muffler away from your well-ventilated areas. and 1928. body. 16. Do not operate a chainsaw in a tree unless you have been specifically trained to do so.

17. All chainsaw service, other than the items listed in the Owner’s