321B Nitro Engine Instruction Manual

INSTRUCTION MANUAL It is important that before attempting to operate your engine that you read, understand and strictly follow the outlined guidelines in the “Safety Instructions, Warnings and Notes” section on pages 1-3 of this manual.

• Study the information provided in this manual in order to become familiar with the controls and features of the engine. • Keep these instructions in a safe place so that you may refer to them when needed. • It is recommended that you keep the instructions for the vehicle, radio/transmitter equipment, etc. accessible at the same time so that you may refer to them when needed.

CONTENTS

1-3 Safety Instructions, Warnings & Notes 4-5 Engine Construction & Notes When Applying the Starter Box 6-7 About the Engine & Standard Included Accessories 8-10 Required Items & Basic Engine Parts 11-12 Carburetor Controls & Glow Plug 13-15 Installation of the Standard Accessories & Engine Installation 16-20 Starting & Breaking-In the Engine 21-23 Final Adjustment 24-25 Care & Maintenance 26-28 Troubleshooting 29-30 Engine Exploded View & Parts List 31-32 Carburetor Exploded View & Parts List 33 Engine Accessories 34 3D Drawing & Specifications SAFETY INSTRUCTIONS, 3D DRAWING & SPECIFICATIONS WARNINGS & NOTES Displacement 3.46cc (0.211cu.in.) Practical R.P.M. 3,000 - 40,000 R.P.M. Remember, this engine is not a “toy”! This is an internal combustion engine that has the potential to damage property, as well as harm you or others if misused. As the owner, you Bore 16.6mm (0.654in.) Power Output 2.5ps / 34,000 R.P.M. alone are responsible for the safe operation of this engine. Act with discretion and care at all Stroke 16.0mm (0.630in.) Weight 355g (12.52oz) times. If the ownership of this engine is transferred to another person, it is the responsibility of the original owner to provide this manual to the new owner.

The following warnings apply to ALL MODEL ENGINES and are grouped under two M3x18 headings according to the degree of danger and/or damage which could occur due to misuse or neglect of this product.

13 WARNINGS NOTES

These cover events which could These cover the many other and generally less cause serious, and in extreme obvious sources of danger, but which under certain circumstances, even fatal injury. circumstances may also cause damage or injury.

1 WARNINGS

2 Near TDC Model engine fuel is poisonous. Do not allow it to come into contact with the Near TDC eyes or mouth. Always store fuel in a clearly marked container and out of the 3 reach of children.

Piston Cylinder Liner Piston Model engine fuel is highly flammable. Keep it away from open flames, excessiveCylinder heat, Liner sources of sparks, or anything else that could ignite it. Do Near TDC not smoke or allow anyone else to smoke near it. 4 Carburetor Restrictor (Venturi) CrankshaftM2.6x7 Carburetor Restrictor (Venturi) Near TDC Model engineSlightCrankshaft taper exhaust, like automobile engine exhaust, contains deadly carbon-monoxide.Slight taper Never operatePiston your engine in an enclosed space. Run High Speed Needle 7 8your engineCylinder onlyLiner in an open, well ventilated area. High Speed (Needle Valve) Slide Boot 7 8 Needle (Needle Valve) Slide Boot Piston Mid Needle Idle Screw Model enginesCylinder Liner generate considerable heat. Do not touch any part of your (Mixture Control Valve)Carburetor Restrictor (Venturi) Mid Needle Idle(Throttle Screw Stop Screw) Crankshaft engine until it has cooled. Contact with the exhaust system or cylinder head (Mixture Control Valve) (Throttle Stop Screw) may resultSlight in ataper serious burn. 5 When the engine is cold. When the engine is hot. O-Ring 12 High Speed Carburetor Restrictor (Venturi) When theCrankshaft engine is cold. When the engine is hot. O-Ring 7 8 Needle Ball Link Rotate the retainer (Needle Valve) Slide Boot Slight taper Ball Link 11 Rotatenut gently the untilretainer it stops HighMid Needle Speed 01 nut gently until it stops Idle Screw 34 Tighten a further O-Ring Needle 7 10 8 (Mixture Control Valve) (Throttle Stop Screw) 120º - 180º O-Ring Retaining Screw (Needle Valve) Low SpeedSlide Needle Boot Dimensions (mm) Tighten a further (Metering Needle) Glowplug 120º - 180º Retaining Screw Thermo Insulator Low Speed Needle Mid Needle (MeteringIdle Screw Needle) Glowplug When the engine is cold. When the engine is hot. O-Ring (MixtureThermo Control Insulator Valve) (Throttle Stop Screw) 9 Exhaust Dirt and dust may lodge in marked places 7 Gasket Close Ball Link Exhaust Rotate the retainer Dirt and dust may lodge in marked places 6 Turn the high speed needle clockwise Close M2.6x18 WhenGasket the enginenut isgently untilcold. ituntil stops. it Whenstops This theis the engine fully isclosed hot. Turn the high speed needle clockwise O-Ring High Speed Do not allow untilposition. it stops. Do not This force is the it tofully turn closed further. O-Ring bottom of crankcase Tighten a further HighNeedle Speed Do not allow Ball Link Rotateposition. the retainer Do not force it to turn further. Open Retaining Screw to touch chassis Low Speed Needle 8 120º - 180º Needle bottom of crankcase Open (Metering Needle) Glowplug nut gently until it stops to touch chassis approx 0.5mm Thermo Insulator Tighten a further O-Ring Element glows when energized Pliers approx 0.5mm Chamfer inside edges of bearers Exhaust Approx. 0.5mm open 120º - 180º DirtRetaining and dust Screw may lodge in marked places Low Speed Needle Element glows when energized Pliers Close Chamfer inside edges of bearers (Metering Needle) Glowplug Gasket Approx.factory setting 0.5mm with open the Turn the high speed needle clockwise Thermo Insulator factoryrestrictor setting removed. with the until it stops. This is the fully closed Do not allow restrictor removed. High Speed Dirt and dust may Carburetorlodge in Body marked places Exhaust position. Do not force it to turn further. Ball Link bottom of crankcase Close Needle Carburetor Body Replace the plug when the Gasket Open BallRotate Link the low speed needle until the head Turnapprox the high 1mm speed needle clockwise High Speed Needle to touch chassis Replaceelement thedoes plug not whenglow orthe is sticks out 0.5mm from the ball link body. untilapprox it stops. 1mm This is the fully closed High Speed Needle Rotate the low speed needle until Dothe nothead allow elementburnt out. does not glow or is approx 0.5mm High Speed This is the standard position. position. Do not force it to turn further. sticks out 0.5mm from the ball linkbottom body. of crankcase Elementburnt out. glows when energized Pliers Needle This is theChamfer standard inside position. edges of bearers Glow Plug Igniter Approx. 0.5mm open Open to touch chassis Glow Plug Igniter factory setting with the Low Speed Needle approx 0.5mm restrictor removed. Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. 1 Element glows when energized Low Speed NeedleChamfer inside edges of bearers Pliers Idle Screw Carburetor Body Deliver fuel to the carburetor High speed needleApprox. position 0.5mm when open Slide Valve 5.5 turnsBall out.Link Make adjustments with the slide in the open position. Replace the plug when the starting the engine.factory setting with the Idle Screw Low Speed Needle Deliver fuel to the carburetor High speed needleapprox position 1mmClose when the high speed High Speed Needle Rotate the low speed needle until the head element does not glow or is restrictor30º removed. Low Speed Needle First rotate the mid needle until its slotted starting the engine. needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE sticks out 0.5mm from the ball link body. 1-1 burnt out. Needle Close the high speed Carburetor Body head is ush with the carburetor body. This is the Fuel Tank Side 30º 30°6 as needed. This FirstBall Thisrotate Link is the midstandard needle position. until its slotted Fuel needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE standard position. Replace the plug when the Needle Open Close Open Close head is ush with the carburetor body. This is the Glow PlugFuel Igniter Tank Side approx 1mm30°procedure as needed. will be This repeated Rotate the low speed needle until the head Fuel 6-1 High Speed Needle standard position. S.M3x3 element does not glow or is procedureseveral times will throughout be repeated Open Close Open Close sticks out 0.5mm from the ball link body. Low Speed Needle burnt out. severalthe break-in times process. throughout Mid NeedleThis is the standard position. Slide Valve 5.52¾ turns turns out. out. Make Make adjustments adjustments with with the the slide slide in in the the open open position. position! the break-in process. Mid Needle Glow Plug Igniter More fuel LessIdle fuel Screw More fuel Less fuel Carburetor Body Deliver fuel to the carburetor High speed needle position when 2¾ turns out. Make adjustments with the slide in the open position! starting the engine. More fuel Less fuel MoreLow fuel SpeedLess Needle fuel Carburetor Body Close the high speed Low Speed Needle 30º Slide Valve 5.5First turns rotateout. Make the adjustments mid needle with theuntil slide its in slottedthe open position. needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE 2 Needle Idle Screw head is ush with the carburetor body. This is the Fuel Tank Side High speed needle position30° when as needed. This 5 Fuel Deliver fuel to the carburetor standard position. starting the engine. procedure will be repeated Open Close OpenLow Speed NeedleClose Close7 the high speed 30º several times throughout First rotate the mid needle until its slotted needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE 5-1 Needle the break-in process. Midhead Needle is ush with the carburetor body. This is the Fuel Tank Side 30° as needed. This Fuel 7-1 2¾standard turns out. position.Make adjustments with the slide in the open position! 3-1 procedure will be repeated MoreOpen fuel LessClose fuel OpenMore fuel LessClose fuel Carburetor Body several times throughout the break-in process. Mid Needle 8-1 2¾ turns out. Make adjustments with the slide in the open position! 3 8 More fuel Less fuel More fuel Less fuel Carburetor Body

9-2 9-1

10 9 ENGINE ACCESSORIES NOTES

Part Number Description • This engine is intended for use in model cars. Do not attempt to use it for any other purpose. PTK-2542 P3 Turbo Glow Plug (Ultra Hot) • Mount the engine in your model securely. Always follow the manufacturer PTK-2060-1 PTK-2060 Tuned Pipe (No Manifold) (Welded Nipple) recommendations, using the appropriate screws and locknuts. PTK-2060 PTK-2060 Tuned Pipe w/Manifold (Welded Nipple) • Install an effective throttle return device. This will close the carburetor in the event PTK-2544 Off-Road Exhaust Manifold (for PTK-2060) that battery power is lost during operation. PTK-2090-1 PTK-2090 Tuned Pipe (No Manifold) (Welded Nipple) • Install an effective silencer (tuned pipe). Frequent close exposure to a noisy PTK-2090 PTK-2090 Tuned Pipe w/Manifold (Welded Nipple) exhaust (especially in the case of more powerful high speed engines) may eventually impair your hearing and such noise is also likely to cause annoyance to others. PTK-2545 Off-Road Exhaust Manifold (for PTK-2090) • Eye protection is highly recommended. PTK-2516 6mm Aluminum Carburetor Restrictor

PTK-2518 6.5mm Aluminum Carburetor Restrictor • Ensure that the linkage to the throttle arm is secure.

PTK-2519 7mm Aluminum Carburetor Restrictor • As a safety precaution, maintain a 20 foot (6 meters) distance between your model and all bystanders (especially small children). PTK-2520 7.5mm Aluminum Carburetor Restrictor

PTK-2521 8mm Aluminum Carburetor Restrictor

PTK-2522 6mm Aluminum "Elliptical" Carburetor Restrictor PTK-2523 6.5mm Aluminum "Elliptical" Carburetor Restrictor WARNING PTK-2524 7mm Aluminum "Elliptical" Carburetor Restrictor WARNING: This product contains chemicals known to the State of California to PTK-2525 7.5mm Aluminum "Elliptical" Carburetor Restrictor cause cancer, birth defects or other reproductive harm. PTk-2526 8mm Aluminum "Elliptical" Carburetor Restrictor THIS PRODUCT IS NOT A TOY! NOT FOR CHILDREN UNDER 14 YEARS. * Specifications are subject to change without notice. For proper opertation and to avoid risk of damage and injury, read and follow all instructions before operating this product. Failure to comply may result in excessive heat, fire, property damage and serious injury.

33 02 NOTES No. Part Number Description 1 PTK-2529 Ball Link

• Before starting the engine, verify that all fasteners, especially those at joints and 1-1 PTK-H-4000 3x3mm Set Screw moving parts (such as the throttle arm) are tight and secure. Loose fasteners are 2 PTK-2535 Carburetor Boot often the source of catastrophic problems and could lead to injury or property damage. 3 PTK-2530 Low Speed Needle

• To stop the engine during normal operation, reduce the throttle to neutral, flip the 3-1 PTK-2531 Low Speed Needle O-Ring car over and push a blunt rubber object against the flywheel. 4 PTK-2503 Slide Valve (Carburetor Complete)

• To stop the engine in the event of an emergency, use a blunt rubber object to 5 PTK-2524 Carburetor Restrictor – 7mm “Elliptical” plug the exhaust and flood the engine (recommended), or cut off the fuel supply by pinching the fuel delivery line from the fuel tank. In the event of an emergency DO 5 PTK-2526 Carburetor Restrictor – 8mm “Elliptical” NOT attempt to stop the engine at the flywheel. 5-1 PTK-2517 Carburetor Restrictor O-Ring

• WARNING! Immediately after a glow type engine has been shut off, while the 6 PTK-2540 High Speed Needle engine is still warm, conditions exist that make it possible for the engine to abruptly re-start if the piston is rotated through the compression point (top dead center: 6-1 PTK-2541 High Speed Needle O-Ring TDC), WITHOUT the glow plug igniter being connected. 7 PTK-2537 High Speed Needle Housing

7-1 PTK-2538 Fuel Inlet with Gasket

8 PTK-2543 Idle Screw

8-1 PTK-2536 Idle Screw O-Ring

9 PTK-2532 Mid Rangle Needle

9-1 PTK-2533 Mid Range Needle O-Ring Large (2)

9-2 PTK-2534 Mid Range Needle O-Ring Small (2)

10 PTK-2513 Carburetor Outer O-Ring

* Specifications are subject to change without notice.

03 32 M3x18

4 M2.6x7

5 12 11 10 Dimensions (mm)

7 9 6 M2.6x18 8

CARBURETOR EXPLODED VIEW ENGINE CONSTRUCTION

This engine uses a chrome plated brass sleeve with a tapered cylinder wall. When the engine is cold, the piston will feel tight when rotated through the top of its stroke, or Top Dead 1 Center (TDC). This is normal. The cylinder will expand and will achieve correct clearance once normal operating temperature has been reached. 1-1 6 6-1 S.M3x3 NOTE: When this engine is new, DO NOT try to turn the crankshaft and rotate the piston through TDC, as this will jam the piston in the cylinder.

2 5 7 5-1 Near TDC 3-1 7-1 8-1 4 3 8

Piston 9-2 Cylinder Liner 9-1

10 9 Carburetor Restrictor (Venturi) Crankshaft Slight taper High Speed

7 8 Needle (Needle Valve) Slide Boot

Mid Needle Idle Screw (Mixture Control Valve) (Throttle Stop Screw)

When the engine is cold. When the engine is hot. O-Ring Ball Link 31 Rotate the retainer 04 nut gently until it stops

Tighten a further O-Ring 120º - 180º Retaining Screw Low Speed Needle (Metering Needle) Glowplug Thermo Insulator

Exhaust Dirt and dust may lodge in marked places Gasket Close Turn the high speed needle clockwise until it stops. This is the fully closed High Speed Do not allow position. Do not force it to turn further. Needle bottom of crankcase Open to touch chassis

approx 0.5mm Element glows when energized Pliers Chamfer inside edges of bearers Approx. 0.5mm open factory setting with the restrictor removed. Carburetor Body Ball Link Replace the plug when the approx 1mm High Speed Needle Rotate the low speed needle until the head element does not glow or is sticks out 0.5mm from the ball link body. burnt out. This is the standard position. Glow Plug Igniter Low Speed Needle Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. Idle Screw Deliver fuel to the carburetor High speed needle position when starting the engine. Low Speed Needle Close the high speed 30º First rotate the mid needle until its slotted needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE Needle head is ush with the carburetor body. This is the Fuel Tank Side 30° as needed. This Fuel standard position. procedure will be repeated Open Close Open Close several times throughout the break-in process. Mid Needle 2¾ turns out. Make adjustments with the slide in the open position! More fuel Less fuel More fuel Less fuel Carburetor Body NOTES WHEN APPLYING No. Part Description Number THE STARTER BOX 1 PTK-2501 Cooling Head 2 PTK-2508 Turbo Plug Button Head DO NOT over prime the engine. This could cause a hydraulic lock and damage the engine 3 PTK-2509 0.1mm & 0.2mm Head Gasket/Shim Set when the starter is applied. 4 PTK-2507 Complete Piston/Sleeve/Rod Assembly • If over-primed, remove the glow plug, close the high speed needle valve, cover the head 5 PTK-2503 Complete Carburetor with a rag and apply the starter to pump out excess fuel. The rag will help to prevent fuel from coming into contact with your eyes. 6 PTK-2514 Carburetor Retainer Assembly Near TDC 7 PTK-2504 7x19x6mm Front Engine Bearing 8 PTK-2502 Crankcase 9 PTK-2505 14x25.4x6mm Ceramic Rear Bearing 10 PTK-2506 Crankshaft

11 PTK-2512 Rear Cover Plate O-Ring Piston 12 PTK-2511 Rear Cover Plate 13 PTK-2542 P3 Turbo Glow Plug (Ultra Hot) Cylinder Liner * Specifications are subject to change without notice. * See additional option parts on Pg.33

Carburetor Restrictor (Venturi) Crankshaft Slight taper High Speed

7 8 Needle (Needle Valve) Slide Boot

Mid Needle Idle Screw (Mixture Control Valve) (Throttle Stop Screw)

When the engine is cold. When the engine is hot. O-Ring Ball Link Rotate the retainer nut gently until it stops 05 30

Tighten a further O-Ring 120º - 180º Retaining Screw Low Speed Needle (Metering Needle) Glowplug Thermo Insulator

M3x18 The ProTek R/C Samurai 321B is a 3.5cc high performance short-stroke nitro engine produced and assembled in Japan by one of the most highly respected model engine manufacturers in the industry. Designed for off-road radio-controlled competition racing, the 13 engine is ideal for 1/8 Scale Buggy and Truggy use while featuring a turbo glow plug and slide carburetor. With its easy-to-tune and consistently stable operating characteristics, the Samurai 321B is the ideal engine of choice for the racer seeking a reliable engine with a smooth power band and great runtime.

1 NOTE: The carburetor is only lightly fit into the engine and is not fully installed. This allows the user to adjust the angle and make necessary adjustments to suit their 2 specific application.

4 M2.6x7

5 12 11 10 Dimensions (mm)

7 9 6 M2.6x18 8

Part Number Size Pieces Used in an Engine

PTK-2515 2.6x7mm Rear Cover Plate Screw - 4

PTK-2514 2.6x18mm Carburetor Retainer Screw (Complete) - 1

PTK-H-1208 3x18mm Cooling Head Retaining Screw - 4 1 29 06 1-1 6 S.M3x3 6-1

2 5 7 5-1 3-1 7-1 8-1 3 8

9-2 9-1

10 9 NearNear TDC TDC

Near TDC PistonPiston CylinderCylinder Liner Liner

STANDARD INCLUDED TROUBLESHOOTING CarburetorCarburetor Restrictor Restrictor (Venturi) (Venturi) ACCESSORIES CrankshaftCrankshaft Piston Cylinder Liner SYMPTOM: NOT REACHING PEAK RPM SlightSlight taper taper • ProTek P3 - Ultra Hot Turbo Glow Plug (PTK-2542) (1) Cause Corrective Action HighHigh Speed Speed Insufficient warming up or break-in. Set the needles only after warming up. NeedleNeedle 7 7 8 8 Complete the break-in process. (Needle(NeedleCarburetor Valve) Valve) Restrictor (Venturi) SlideSlide Boot Boot Crankshaft Silencer or manifold are not securely Replace gasket. connected or are disconnected. Check and secure the system. MidMid Needle Needle Slight taper Near TDC IdleIdle Screw Screw Fuel tubing from tank is split or broken. Replace the tubing. (Mixture(Mixture Control Control Valve) Valve) (Throttle(Throttle Stop Stop Screw) Screw) • 0.1mm Cylinder Head Shim (PTK-2509) (1) High Speed Near TDC Needle 7 8 SYMPTOM: POOR THROTTLE RESPONSE (Needle Valve) Slide Boot WhenWhen the the engine engine is iscold. cold. WhenWhen the the engine engine is ishot. hot. O-RingO-Ring Cause Corrective Action Piston Mid Needle Idle Screw Deteriorated glow plug. Replace glow plug. (Mixture Control Valve) BallBall Link Link Cylinder Liner RotateRotate the the retainer retainer (Throttle Stop Screw) • High Temp Exhaust Gasket (PTK-2528) (1) nutnut gently gently until until it itstops stops Incorrect carburetor settings. Readjust low RPM range with Low Speed Piston Needle and Mid Needle. Cylinder Liner TightenTighten a afurther further O-RingO-Ring When the engine is cold. When the engine is hot. Incorrect Setting of transmitter Exponential Check the transmitter setting. Low Speed Needle 120º120º - O-Ring180º- 180ºfunction. RetainingRetaining Screw Screw Carburetor Restrictor (Venturi)Low Speed Needle Crankshaft (Metering(Metering Needle) Needle) GlowplugGlowplug Incorrect Linkage. Make sure the throttle servo linkage does ThermoThermo Insulator InsulatorBall Link Rotate the retainer Slight taper not bind and is connected correctly. Carburetor Restrictor (Venturi) nut gently until it stops • 7mm “Elliptical” Carburetor Restrictor (PTK-2524)ExhaustExhaust (1) Crankshaft DirtDirt and and dust dust may may lodge lodge in in marked marked places places 8mm “Elliptical” Carburetor Restrictor (PTK-2526) (1) High Speed GasketGasket CloseClose O-Ring Slight taper Tighten a further SYMPTOM: POOR RPM DROP Needle 7 8 TurnTurn the the high high speed speed needle needle clockwise clockwise Retaining Screw Low Speed Needle 120º - 180º (Needle Valve) Slide Boot untiluntil it itstops. stops. This This is isthe the fully fully closed closed Cause Corrective Action High Speed DoDo not(Metering not allow allow Needle) Glowplug HighHigh Speed Speed Thermo Insulator position.position. Do Do not not force force it itto to turn turn further. further. Throttle position open too far. Close Low Speed Needle to adequate Needle bottombottom of of crankcase crankcase 7 8 NeedleNeedle Mid Needle Idle Screw OpenOpen position to lower idle RPM. (Needle Valve)toto touch touch chassis chassis Slide Boot Dirt and dust may lodge in marked places (Mixture Control Valve) (Throttle Stop Screw) • 3mm, 16mm & 17mm Dust CapExhaust (PTK-2527) (1) Carburetor not fully seated. Install carburetor securely. Close Mid Needle Gasket approxapprox 0.5mm 0.5mm Idle Screw Turn the high speed needle clockwise Low Speed Needle closed too far. Open the Low Speed Needle a little. ElementElement glows glows when when energized energized ChamferChamfer inside inside(Mixture edges edges Control of of bearers bearers Valve) (Throttle Stop Screw) untilPliersPliers it stops. This is the fully closed When the engine is cold. WhenApprox.Approx. the engine 0.5mm 0.5mm is openhot. open O-Ring High Speed Do not allow position. Do not force it to turn further. factoryfactory setting setting with with the the Needle bottom of crankcase restrictorrestrictor removed. removed. Open to touch chassis Ball Link WhenRotate the theengine retainer is cold. When the engine is hot. O-Ring 07 CarburetorCarburetor Body Body 28 nut gently until it stops BallBall Link Link approx 0.5mm Ball Link ReplaceReplace the the plug plug when when the the Element glows when energized Rotate approxtheapprox retainer 1mm 1mm Tighten a further High Speed Needle O-Ring ChamferRotateRotate inside the the low lowedges speed speed of needlebearers needle until until the the head head element does not glow or is Pliers High Speed Needle element does not glow or is Approx.nut gently0.5mm until open it stops 120º - 180º Retaining Screw stickssticks out out 0.5mm 0.5mm from from the the ball ball link link body. body. Low Speed Needle burntburnt out. out. factory setting with the (Metering Needle) Glowplug O-Ring ThisThis is isthe the standard standard position. position. restrictor removed. Tighten a further Thermo Insulator Retaining Screw Low Speed Needle GlowGlow Plug Plug Igniter Igniter 120º - 180º Carburetor Body Dirt and dust may lodge in markedBall placesLink (Metering Needle) Glowplug Exhaust Thermo Insulator Replace the plug when the Close LowLow Speed Speed Needle Needle Gasket approx 1mm High Speed Needle Rotate the low speed needle until the head element does not glow or is Turn the high speed needle clockwise SlideSlide Valve Valve 5.5 5.5 turns turns out. out. Make Make adjustments adjustments with with the the slide slide in inthe the open open position. position. Dirt and dust may lodge in sticks marked out 0.5mm places from the ball link body. burnt out. ExhaustHighuntil speed it stops. needle This positionis the fully when closed IdleIdle Screw Screw DeliverDeliver fuel fuel to to the the carburetor carburetor High speed needle position when Close High Speed This is the standard position. Do not allow Gasketstartingposition.starting the theDo engine. engine.not force it to turn further. LowLow Speed Speed Needle Needle bottom of crankcase Glow Plug Igniter Turn the highCloseClose speed the the needle high high speed clockwisespeed Needle 30º30º Open FirstFirst rotate rotate the the mid mid needle needle until untilto itstouch its slotted slotted chassis until it stops. needle needleThis isapproximately approximatelythe fully closed HIGHHIGH SPEED SPEED NEEDLE NEEDLE LOWLOW SPEED SPEED NEEDLE NEEDLE Do not allow NeedleNeedle High Speed headhead is is ush ush with with the the carburetor carburetor body. body. This This is isthe the FuelFuel Tank Tank Side Side position. Do30° not30° asforce as needed. needed. it to turn This This further. Low Speed Needle bottom of crankcase FuelFuel approx 0.5mm Needle standardstandard position. position. procedureprocedure will will be be repeated repeated OpenOpenOpen CloseClose OpenOpen CloseCloseSlide Valve 5.5 turns out. Make adjustments with the slide in the open position. to touch chassis Element glows when energized Pliers Idle Screw Chamfer inside edges of bearers High speed needle positionApprox. when0.5mm openseveralseveral times times throughout throughout Deliver fuel to the carburetor Low Speed Needle starting the engine. factory setting withthethe the break-in break-in process. process. approx 0.5mm MidMid Needle Needle Close the high speed 2¾2 ¾turns turns out. out. Make Make adjustments adjustments with with the the slide slide in inthe the open open position! position! Element glows when energized Pliers30ºrestrictor removed. First rotate the mid needle untilChamfer its slotted inside edges of bearers needle Approx.approximately 0.5mm open HIGH SPEEDMore MoreNEEDLE fuel fuel LessLessLOW fuel fuel SPEEDMore NEEDLEMore fuel fuel LessLess fuel fuel CarburetorCarburetor Body Body Needle head is ush with the carburetor body. This is the Fuel Tank Side 30° as factoryneeded. setting This with the Carburetor Body Fuel standardBall position.Link procedurerestrictor will be removed. repeated Open Close Open Close Replace the plug when the approx 1mm Rotate the low speed needle until the head several times throughout High Speed Needle element does not glow or is Carburetor Bodysticks out 0.5mm from the ball link body. the break-in process. Mid Needle Ball Link burnt out. This is the standard position. Replace the plug when the approx 1mm 2¾ turns out. Make adjustmentsRotate with the slide low in speed the open needle position! until the head More fuel HighLess Speedfuel NeedleMore fuel Less fuel elementGlow Plug does Igniter not glow or is Carburetor Body sticks out 0.5mm from the ball link body. burnt out. This is the standard position. Low Speed Needle Glow Plug Igniter Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. Idle Screw High speed needle position when Low Speed Needle Deliver fuel to the carburetor Low Speed Needle starting the engine. Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. Close the high speed 30º Idle Screw First rotate the mid needle until its slotted High speed needleneedle position approximately when HIGH SPEED NEEDLE LOW SPEED NEEDLE Deliver fuel to the carburetorNeedle Low Speed Needle head is ush with the carburetor body. This is the Fuel Tank Side starting the engine.30° as needed. This Fuel Close the high speed standard position. procedure30º will be repeated Open Close Open Close First rotate the mid needle until its slotted needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE Needle several times throughout head is ush with the carburetor body. This is the Fuel Tank Side 30° as needed. This Fuel the break-in process. Mid Needle standard position. procedure will be repeated Open Close Open Close 2¾ turns out. Make adjustments with the slide in the open position! several times throughoutMore fuel Less fuel More fuel Less fuel Carburetor Body the break-in process. Mid Needle 2¾ turns out. Make adjustments with the slide in the open position! More fuel Less fuel More fuel Less fuel Carburetor Body TROUBLESHOOTING REQUIRED ITEMS & BASIC ENGINE PARTS SYMPTOM: ENGINE FIRES INTERMITTENTLY BUT DOES NOT RUN The following items are required to operate the engine. FUEL Cause Corrective Action The user should only use high quality fuel for two stroke glow type Near TDC Insufficient fuel in the tank. Fill the tank with fuel. engines that contains 10-30% nitromethane. Fuel with 20% nitro content is recommended for break in. Then, change to a fuel with a Deteriorated glow plug. Replace glow plug. higher nitro content later if desired. When the brand of fuel is changed, or the nitro content is increased, it is advisable to repeat a short break Clogged fuel filter. Clean or replace fuel filter. in procedure referred to in the BREAKING IN section. Please note that Air cleaner or internal silencer are dirty. Replace air cleaner element and clean high nitro content fuels produce more power at the expense of reduced inside silencer. engine life. This will also shorten the life of the glow plug element. Piston Engine is over heated. Wait until engine is cool. Cylinder Liner WARNING Incorrect clutch release. Adjust the tension of the clutch spring. Model engine fuel is poisonous.Near TDCDo not allow it to come into contact with Glow plug battery disconnected too soon. Wait until RPM becomes stable before Near TDC the eyes or mouth. Always store it in a clearly marked container and out of disconnecting plug battery. Near TDC the reach of children. Wash hands after use. Vibration causing air bubbles in fuel. Install o-rings to the fuel tank screws to Carburetor Restrictor (Venturi) Near TDC Piston Crankshaft Model engine fuel is highly flammable.Piston Keep away from open flames, prevent bubbles. Cylinder Liner Cylinder Liner excessive heat, sparks, or anything else that could ignite it. Do not smoke Slight taper Near TDC or allow anyone else to smoke near it. Carburetor Restrictor (Venturi) Crankshaft Carburetor Restrictor (Venturi) Crankshaft High Speed SYMPTOM: UNSTABLE IDLE Piston FUEL FILTER Slight taper Slight taper Needle 7 8 Piston Install the filter in the fuel line between the fuel tank and the High Speed High Speed Slide Boot Cylinder Liner 7 8 Needle Cause Corrective Action carburetor to prevent dust from entering the carburetor. (NeedleNeedle Valve) Slide Boot Cylinder Liner Piston 7 8 (Needle Valve) (Needle Valve) Slide Boot Mid Needle Idle Screw Incorrect glow plug. Use the glow plug recommended in Cylinderthe Liner Mid NeedleMid Needle (Mixture Control Valve) (ThrottleIdle Screw Stop Screw)Idle Screw instructions. GLOW PLUG IGNITER (Mixture Control Valve) (Throttle Stop Screw) Commercially available, a glow plug igniter is a handy tool (Mixture Control Valve) (Throttle Stop Screw) CarburetorCarburetor Restrictor (Venturi) Restrictor (Venturi) Unsuitable fuel. Do not use extremely high nitro or low oil that uses an integratedWhen batterythe engine isto cold. heat Whenthe glowthe engine plug. is hot. O-Ring Crankshaftcontent fuel. Crankshaft When the engine is cold. When the engine is hot. O-Ring Carburetor Restrictor (Venturi) Crankshaft Recommended: PTK-7605 - ProTek R/C “SureStart” Rechargeable Ball Link Glow Ignitor w/Charger (2100mAhRotate the NiMH)retainer Ball Link Extremely light flywheel. Add heavier flywheel. Slight taper nutRotate gently the untilretainer it stops Slight taper Slight taper nut gently until it stops When the engine is cold. When the engine is hot. O-Ring Tighten a further O-Ring O-Ring High Speed Silencer or manifold are not securely Replace seal ring. 120ºTighten - 180º a further Retaining Screw High Speed Low Speed Needle STARTER BOX 120º - 180º Retaining Screw NeedleHigh Speed (MeteringLow Speed Needle) Needle connected or are disconnected. 7 Check and8 secure7 the system.8 Glowplug Needle Thermo Insulator (Metering Needle) GlowplugUsed to start the engine. Thermo Insulator Slide Boot SlideBall Boot Link 7 8 Rotate the retainer (Needle(Needle Valve)Needle Valve) Exhaust Dirt and dust may lodge in marked places Recommended: PTK-4500 - ProTek R/C SureStart 1/8 Off-Road Dirt and dust may lodge in marked places GasketExhaust Close Slide Boot nut gently until it stops Close Mid Needle (Needle Valve) Starter Box Gasket Turn the high speed needle clockwise Mid Needle Idle Screw Idle Screw untilTurn itthe stops. high Thisspeed is needlethe fully clockwise closed (Mixture Control Valve) Do not allow until it stops. This is the fully closed High Speed (Mixture Control Valve) (Throttle Stop Screw) position. Do not force it to turn further. High Speed bottomDo not allowof crankcase(Throttle Stop Screw) position.O-Ring Do not force it to turn further. Needle Mid Needle Tighten a further Open Needle tobottom touch of chassis crankcase Idle Screw 27 Retaining ScrewOpen 08 (Mixture Control toValve) touch chassis Low Speed Needle 120º - 180º approx 0.5mm (Throttle Stop Screw) When the engine is cold. When the engine is hot. O-Ring approx 0.5mm Element glows when energized Pliers Chamfer inside edges of bearers (Metering Needle) Glowplug When the engine is cold. When the engine is Elementhot. glows when energizedO-Ring Pliers Approx. 0.5mm open ChamferThermo inside edges Insulator of bearers factoryApprox. setting 0.5mm with open the Ball Link Rotate the retainer restrictorfactory setting removed. with the restrictor removed. Ball Link nut gently until it stops Carburetor Body When the engine is cold. WhenRotate the the engine retainer is hot. Dirt and dust may lodge in marked placesCarburetor Body Ball Link Exhaust Replace theO-Ring plug when the Ball Link nut gently until it stops Replace the plug when the approx 1mm O-Ring High Speed Needle Rotate the low speed needle until the head Closeelement does notTighten glow or isa further approx 1mm High Speed Needle Rotate the low speed needle until the head Gasket element does not glow or is sticks out 0.5mm from the ball linkLow body. Speed Needle burnt out. 120º - 180º Retaining Screw Thissticks is out the 0.5mm standard from position. the ball link body. Ball Link Turn the high speed needle clockwise Tightenburnt out. a further O-Ring This is the standard position. (Metering Needle) GlowplugRotate the retainer Glow Plug Igniter Thermo Insulator until it stops. This is the fully closed 120º - 180ºGlow Plug Igniter Retaining Screw Do notLow allow Speed Needle nut gently until it stops High Speed Low Speed Needle (Metering Needle) Glowplug position. Do not force it to turn further. Dirt and dust may lodge in marked places Slide Valve 5.5Low turns Speed out. Make Needle adjustments with the slide in the open position. Exhaust Idle Screw Slide Valve 5.5 turns Thermoout. Make adjustments Insulator with the slide in the openbottom position. of crankcase Deliver fuel to theClose carburetorNeedleHigh speed needle position when Idle Screw Gasket Open startingHigh speed theO-Ring needleengine. position when Low Speed Needle Tighten a further Deliver fuel to the carburetor Low Speed Needle to touch chassis Turn the high speed needle clockwise starting the engine. Close the high speed First rotate the mid needle until its slotted 30º Close the highDirt speed and dust may lodge in marked places Low Speed Needle Exhaust 120º - 180º 30º needleRetaining approximately Screw HIGH SPEED NEEDLE LOW SPEED NEEDLE headFirst rotateis ush the with mid the needle carburetor until its body. slotted This is the until it stops. This is the fully closed Needle needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE Do not allow CloseFuel Tank Side Needle High Speed30° as needed. This standardhead is ush position. with the carburetor body. This is the Gasket Fuel Fuel Tank Side 30° as needed. This (Metering Needle) position. Do not forceFuel it to turn further. procedure will be repeated Open Close Open Close standard position.bottom of crankcase Glowplug Turn the high speed needleapprox clockwise 0.5mm Needle procedure will be repeated Open Close Open Close Open several times throughout toThermo touch chassis Insulator Element glows when energized until it stops. This is the fully closed theseveral break-in times process. throughout ChamferMid Needle inside edgesDo not ofallow bearers Pliers High Speed the break-in process. 2Mid¾ turns Needle out. Make adjustments with the slide in the open position! Approx. 0.5mmposition. open Do not force it to turn further. approx 0.5mm More fuel Less fuel More fuel Less fuel Carburetor Body 2¾ turns out. Make adjustments withbottom the slide in theof open crankcase position! Exhaust Needle Dirt and dust mayMore fuel lodgeLess in fuel More markedfuel Less fuel placesCarburetor Body Element glows whenfactory energized setting withPliers the Open Chamfer inside edges of bearersto touch chassis Gasket Approx.Close 0.5mm open Turn therestrictor high speed removed. needle clockwisefactory setting with the restrictor removed. approx 0.5mm Element glows when energized until it stops. This is the fully closed Carburetor Body Do not allow Pliers High Speed Carburetor Body Ball LinkChamfer inside edges of bearers Replace the plug when the position. Do not force it toApprox. turn 0.5mmfurther. open Ball Link bottom of crankcase Replace the plug approxwhen the 1mm factory setting with the Needle Rotate the low speed needle until the head approx 1mmOpenHigh Speed Needle High Speed Needle Rotate the low speed needle until the head element does not glow or is element does not glow or is restrictor removed. sticks out 0.5mm from the ball link body. to touch chassis burnt out. sticks out 0.5mm from the ball link body. burnt out. Carburetor Body This isThis the standard is the position.standard position. approx 0.5mm Ball Link Replace the plug when the Glow Plug Igniter Element glowsGlow when Plug energized Igniter approx 1mm High Speed Needle Rotate the lowChamfer speed needle inside until edges the head of bearers element does not glowPliers or is Low Speedsticks Needle out 0.5mm from the ball link body. burnt out. Approx. 0.5mm open Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. Idle Screw Low ThisSpeed is the Needle standard position. Deliverfactory fuel to the setting carburetor withHigh the speed needle position when Glow Plug Igniter starting the engine. Low Speed Needle Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. restrictor removed. Close the high speed 30º Idle Screw First rotate the mid needle until its slotted High speed needle position when needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE Deliver fuel to the carburetor Needle Carburetor Body Lowhead Speedis ush Needlewith the carburetor body. This is the Fuel Tank Side 30° as needed. This Ball Link startingFuel the engine. Low Speed Needle Slide Valve 5.5standard turns out. position. Make adjustments with the slide in the open position. procedure will be repeated Open Close Open Close Replace the plug when the approx 1mmClose the high speed Idle Screw First Rotaterotate the midlow speedneedle needle until its until slotted the head Deliver fuel to the carburetor30º High speed needle position when severalHigh Speedtimes throughout Needle element does not glow or is startingneedle the engine.approximately the break-inHIGH SPEED process. NEEDLE LOW SPEEDLow SpeedNEEDLE Needle Mid Needleheadsticks is ush out with 0.5mm the carburetorfrom the ball body. link This body. is the burnt out. Needle 30° as needed. ThisClose the high speed 2¾ turns out. Make adjustments with the slide in the open position! Fuel Tank Side 30º More fuel Less fuel More fuel Less fuel First rotateThis the is midthe needlestandard until position.its slotted Fuel needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE Carburetor Body standard position. Needleprocedure will be repeated Open Close Open Close head is ush with the carburetor body. This is the Fuel Tank Side 30° as needed. This Glow Plug Igniter Fuel standard position. several times throughoutprocedure will be repeated Open Close Open Close Mid Needle the break-in process.several times throughout Low Speed Needle the break-in process. Mid2¾ Needleturns out. Make adjustments with the slide in the open position! More fuel Less fuel More fuel Less fuel CarburetorSlide Valve Body25.5¾ turns turns out. out. Make Make adjustments adjustments with the with slide the in the slide open in position! the open position. More Idlefuel ScrewLess fuel More fuel Less fuel Carburetor Body Deliver fuel to the carburetor High speed needle position when starting the engine. Low Speed Needle Close the high speed 30º First rotate the mid needle until its slotted needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE Needle head is ush with the carburetor body. This is the Fuel Tank Side 30° as needed. This Fuel standard position. procedure will be repeated Open Close Open Close several times throughout the break-in process. Mid Needle 2¾ turns out. Make adjustments with the slide in the open position! More fuel Less fuel More fuel Less fuel Carburetor Body Near TDC STARTER BOX BATTERIES TROUBLESHOOTING Near TDC Use the battery type that is recommended by the starter box manufacturer. Ensure that the battery is fully charged before use. Recommended: ECP-LPH-5000-2S30 (x2) - EcoPower 2S Li-Poly Battery Pack SYMPTOM: ENGINE FAILS TO START

Piston Cause Corrective Action Near TDC Cylinder LinerPiston FUEL BOTTLE Fuel tank is empty. Fill the tank with fuel and repeat priming Use this to fill the fuel tank. Cylinder Liner Fuel not reaching the engine. procedure. Recommended: PTK-7600 - ProTek R/C “Fast Fill” Fuel Bottle (500cc) & PTK-7603 - ProTek R/C “Quick Pit” Fuel Gun Glow plug element is burned out. Replace glow plug. Carburetor RestrictorGlow (Venturi) plug battery discharged. Recharge or replace the battery. Crankshaft Carburetor Restrictor (Venturi)Clogged fuel filter. Clean or replace fuel filter. Slight taper Piston SILICONE FUEL LINE Air cleaner or internal silencer are dirty. Replace air cleaner element and clean Crankshaft Heatproof silicone tubing suitable for nitro fuel with an approximate inside silencer. Cylinder Liner 5mm outer diameter and 2mm inner diameter is required to make the High Speed Slight taper 7 8 connection between the fuel tank and the engine. Needle Engine is over primed (flooded). Remove glow plug and pump out excess Slide Boot High Speed(Needle Valve) fuel. Needle Fuel tubing is disconnected. Connect fuel tubing securely. 7 8 TOOLS Mid Needle Idle Screw CarburetorSlideFuel Boot tubing Restrictor is kinked, (Venturi) split or has a hole. Check the tubing carefully and replace if (Needle Valve)(Mixture Control Valve) (Throttle Stop Screw) Crankshaft HEX SCREWDRIVER necessary. Use for engine installation. 1.5mm, 2mm, 2.5mm, 3mm Mid Needle Idle Screw Near TDC Incorrect servo linkage. Connect correctly after setting servo at Slight taper Recommended: PTK-8227 - ProTek R/C “TruTorque” (Mixture Control Valve) (Throttle Stop Screw) neutral. When the engine is cold. When the engine is hot. O-Ring Metric Hex Driver Set High Speed Reverse rotating direction of the Make sure the starter box rotates counter Ball Linkstarter box. clockwise as seen from crankshaft side. 7 8 Near TDC Rotate the retainer Needle When the engine is cold. When thenut engine gently isuntil hot. it stops O-Ring SCREWDRIVER (Needle Valve) Slide Boot Necessary for carburetor adjustments. No.1, No.2, etc. Piston O-Ring Tighten a further Recommended: PTK-8219 - ProTek R/C “TruTorque” Flat Mid Needle Ball Link Cylinder Liner Rotate the retainerNear TDC 120º - 180º Blade Screwdriver (4mm)Retaining Screw Low Speed NeedleIdle Screw (Mixture Control Valve)(Metering Needle) Glowplug nut gently until it stops Thermo Insulator (Throttle Stop Screw) Piston O-Ring Cylinder Liner Tighten a further LONG SOCKETDirt and WRENCH dust may lodge in marked places Exhaust Retaining Screw Carburetor Restrictor (Venturi) Low Speed Needle Crankshaft 120º - 180º Close WITH PLUG GRIP Gasket (Metering Needle) Glowplug When the engine is cold. PistonWhen theTurn engine the high is speedhot. needle clockwiseO-Ring Recommended for easy removal and replacement of the glow Thermo Insulator Slight taper until it stops. This is the fully closed plug, this socket wrench incorporates a special internal grip. Cylinder Liner High Speed Carburetor Restrictor (Venturi) Do not allow position. Do not force it to turn further. Recommended: PTK-8202 - ProTek R/C High“TruTorque” Speed 4-in-1 Ball Link Crankshaft NeedleDirt and dust may lodge in marked places bottom of crankcase Exhaust Rotate the retainer Open Multi-Wrench Needle 7 8 Close to touch chassis SlightGasket taper nut gently until it stops (Needle Valve) Slide Boot Turn the high speed needle clockwise ProTek R/C offers a full line of batteries, chargers, servosCarburetor and Restrictor (Venturi) approx 0.5mm accessories. Visit www.ProTekRC.com forHigh more Speed information. Crankshaft until it stops. This is the fully closed O-Ring Mid Needle Idle Screw Do not allow Element glows when energized Pliers Tighten a further High Speed Needle Chamfer inside edges of bearers 7 8 position. Do not force it to turnApprox. further. 0.5mm open (Mixture Control Valve) (Throttle Stop Screw)bottom of crankcase Low Speed Needle Slight taper 120º - 180º Needle Retaining Screw (Needle Valve) Slide Boot factory settingOpen with the 09 to touch chassis (Metering Needle) 26 Glowplug restrictor removed. HighMid NeedleSpeed Thermo Insulator Needle Idle Screw 7 8 When the engine is cold. When the engine is hot. Carburetor(Mixture Body Control Valve) O-Ring approx 0.5mm (Needle Valve) Ball Link (ThrottleSlide Stop Boot Screw) Dirt and dust may lodge in marked places Element glows when energizedReplace theExhaust plugPliers when the approx 1mm ChamferRotate the inside low speededges needle of bearers until the head Approx. 0.5mm open High Speed Needle Mid Needle Ball Link elementRotate does notthe glowretainer or is Close sticks out 0.5mmIdle fromScrew the ball link body. Gasket (Mixture Control Valve) Whenburnt the out.nut engine gently is untilcold. it stopsWhenTurnfactory the the engine high setting isspeed hot. with needlethe clockwiseO-Ring This is the standard(Throttle position. Stop Screw) restrictor removed. Glow Plug Igniteruntil it stops.Tighten This a is further the fully closed O-Ring Ball Link Do not allow Rotate the retainer High Speed Carburetor Body position. Do120º not - force180º it to turn further. Retaining Screw Ball Link Low Speed Needle bottom of crankcase When the enginenut is gently cold. until itWhen stops the engine is hot. O-Ring Needle Low Speed Needle(Metering Needle) GlowplugReplace the plug when the Open SlideThermo Valve RotateInsulator5.5 the turns low out. Makespeed adjustments needle with until the slidethe in head the open position. to touch chassis approx 1mm High Speed NeedleO-Ring element does not glow or is Tighten a further Idle Screw Ball Link Rotate the retainer High speed needle position when Retaining Screw sticks out 0.5mm from theLow ballSpeed link Needle body. burnt out. Exhaust Deliver fuel to the carburetor 120º - 180º Dirt and dust may lodge in markedLow Speed places Needle nut gently until it stops starting Closethe engine. approx 0.5mm This is the standard position.(Metering Needle) Glowplug Gasket Close the high speed Thermo Insulator Element glows when energized Turn the high speed needle clockwise 30º First rotate the mid needleChamfer until its inside slotted edges of bearers Glow Plug Igniter Pliers Tighten a further needle approximately O-RingHIGH SPEED NEEDLE LOW SPEED NEEDLE until it stops. This is the Approx.fully closedNeedle 0.5mm open head is ush with the carburetor body. This is the Fuel Tank Side 120º - 180º 30° asHigh needed. Speed This RetainingDirt and dust Screw may lodge in marked places Do not allow Low Speed Needle ExhaustFuel position. Do not force it to turn further. standard position. factory setting withClose the procedureNeedle will be repeated Open Close Open Close Low Speed bottomNeedle of crankcase (Metering Needle) Glowplug Gasket Open Thermo Insulator Turn the high speedrestrictor needle clockwise removed. several times throughout Slide Valve 5.5 turns out. Maketo touch adjustments chassis with the slide in the open position. Idle Screw Mid Needle Highuntil speed it stops. needle This is position the fully whenclosed the break-in process. Dirt and dust may lodge in marked places Do not allow Deliver fuel to the carburetorExhaust approx 0.5mm High Speed Carburetor Body2¾ turns out. Make adjustments with the slide in the open position! position. Do not force it to turn further. Close Low Speed Needle bottomBall of Linkcrankcase Element glows when energized Gasket starting the engine. Needle More fuel Less fuel More fuel Less fuel Chamfer insideCarburetor edges Body of bearers Replace the plug when the Pliers Turn the high speed needleClose clockwise the high Open speed to touch chassis Approx. 0.5mm 30ºopenapprox 1mm High Speed Needle First rotate the mid needleRotate until the itslow slotted speed needle until the head until it stops. This is the fullyneedle closed approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE element does not glow or is factory setting with the High Speed head is ush Dowith not the allow carburetor body. This is the Needleposition. Do not force it to30° turn asfurther. needed.approx This 0.5mm sticks out 0.5mm from the ball link body. burnt out. Fuel Tank Side restrictor removed. Needle standard position.bottom of crankcase ElementFuel glows when energized Open Chamfer inside edges of bearersThis is the standard position. Pliers procedure will be repeated Open Close Open Carburetor CloseBody to touch chassis Approx. 0.5mm open Ball Link Glow Plug Igniter factory setting with severalthe times throughout Replace the plug when the approx 0.5mm Rotate the low speed needle until the head approxrestrictor 1mm removed. the break-inHigh process. Speed Needle Mid Needle elementElement does glows not glow when or energizedis sticks out 0.5mmChamfer from2 insidethe¾ turns ball edges out. link Make body.of bearers adjustments with the slide in the open position! Pliers Carburetor Body Low Speed Needle burnt out. Approx. 0.5mm open More fuel Less fuel More fuel Less fuel ThisBallCarburetor is Link the standard Body position. Replace the plug when the factory setting with the Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. Glow Plug Igniter approxrestrictor 1mm removed. High Speed Needle Idle Screw Rotate the low speed needle until the head element does not glow or is High speed needle position when sticks out 0.5mm from the ball link body. Deliver fuel to the carburetor Carburetor Body burnt out. starting the engine. Low SpeedLow Needle SpeedBall ThisNeedle Link is the standard position. Replace the plug when the Close the high speed Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. Glow Plug Igniter approx 1mm High Speed Needle Rotate the low speed needle until theFirst head rotate the mid needle until its slotted element does not glow or is High speed needle position when 30º Idle Screw Deliver fuel to the carburetor needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLEsticks out 0.5mm from the ball link body.head is ush with the carburetor body. This is the burnt out. starting the engine.Needle Low Speed Needle Low Speed Needle Fuel Tank Side Close the high speed30° as needed. This This is the standard position. Fuel 30º Slide Valve First5.5 rotate turns out. the Make mid adjustments needle until with theits slide slotted in the openstandard position. position. needle approximatelyprocedure HIGH will SPEED be repeatedNEEDLE OpenLOW SPEED NEEDLEClose Open Close Glow Plug Igniter Needle Idle Screw head is ush with the carburetor body. This is the Fuel Tank Side High speed needle position30° as needed. when This Fuel Deliver fuel to the carburetor several times throughout Low Speed Needle standard position. starting the engine. Open Close Low Speed Needle procedureClose willthe behigh repeated speed Close Open the break-in process. Slide Valve 5.5First turns out.rotate Make the adjustments mid needle with the until slide its in theslotted openMid position. Needle 30ºseveral times throughout needle approximately HIGH SPEED NEEDLEIdle Screw LOW SPEED NEEDLE head is ush with the carburetor body. This2¾ turns is the out. Make adjustments with the slide in the open position! HighNeedle speed needle positionthe break-in30° when as needed.process. This Mid Needle Deliver Fuelfuel Tankto the Side carburetor More fuelLow SpeedLess Needle fuel More fuel 2¾Less turnsstandard out.fuel Make adjustmentsposition. Carburetorwith the slide in the Body open position! Fuel starting the engine. Close Closeprocedure the high will speedbe repeated More fuelOpen Less fuelClose MoreOpen fuel Less fuel Carburetor Body 30º First rotate the mid needle until its slotted needleseveral approximately times throughout HIGH SPEED NEEDLE LOW SPEED NEEDLE Needle head is ush with the carburetor body. This is the Fuel Tank Side 30°the break-inas needed. process. This Mid Needle Fuel 2standard¾ turns out. position.Make adjustments with the slide in the open position! Open Close Open Close procedure will be repeated More fuel Less fuel More fuel Less fuel Carburetor Body several times throughout the break-in process. Mid Needle 2¾ turns out. Make adjustments with the slide in the open position! More fuel Less fuel More fuel Less fuel Carburetor Body Near TDC

Piston Cylinder Liner

Carburetor Restrictor (Venturi) Crankshaft Slight taper High Speed

7 8 Needle (Needle Valve) Slide Boot

Mid Needle Idle Screw (Mixture Control Valve) (Throttle Stop Screw)

When the engine is cold. When the engine is hot. O-Ring Ball Link Rotate the retainer nut gently until it stops

Tighten a further O-Ring 120º - 180º Retaining Screw Low Speed Needle (Metering Needle) Glowplug Thermo Insulator

Exhaust Dirt and dust may lodge in marked places BASIC ENGINE PARTS Gasket Close Turn the high speed needle clockwise until it stops. This is the fully closed High Speed Do not allow Cooling Head position. Do not force it to turn further. Needle bottom of crankcase Open to touch chassis approx 0.5mm Element glows when energized Pliers Chamfer inside edges of bearers Approx. 0.5mm open factory setting with the restrictor removed. INSTALLING DUST CAPSCarburetor Body When storing the engine install the cap on the exhaust port, carburetor,Ball Link etc. to prevent dust Carburetor Replace the plug when the from entering the engine. This can cause permanent damage. approx 1mm High Speed Needle Rotate the low speed needle until the head Exhaust element does not glow or is sticks out 0.5mm from the ball link body. burnt out. CHECKING THE ENGINE As the engine wears, performance will decrease. It is suggested to replaceThis isparts the asstandard needed position. Glow Plug Igniter when the following symptoms are detected. Back Plate • Engine sound changes and easily overheats. Low Speed Needle • Power has dropped. Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. High speed needle position when Idle Screw Deliver fuel to the carburetor • Idling is unstable and/or engine cuts out when idling. starting the engine. Low Speed Needle Crankshaft Close the high speed 30º In most cases, the bearings, piston & sleeve assembly, connectingFirst rod rotate and/or the crankcase mid needle until its slotted needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE Needle have become worn. Check the parts carefully and replace as needed.head is ush with the carburetor body. This is the Fuel Tank Side 30° as needed. This Fuel standard position. Open Close Open Close procedure will be repeated Mounting Lugs several times throughout the break-in process. Mid Needle 2¾ turns out. Make adjustments with the slide in the open position! Crankcase More fuel Less fuel More fuel Less fuel Carburetor Body

Front Bearing

25 10 CARBURETOR CONTROLS CARE & MAINTENANCE

The following procedure is recommended for this engine when the ProTek R/C P3, PTK-2060 or PTK-2090 tuned pipe and fuel containing up to 30% nitromethane are used. 1 The small particles of foreign matter that may be present in any fuel may obstruct fuel flow, causing erratic engine performance, unreliable operation or permanent damage to HIGH SPEED NEEDLE (NEEDLE VALVE) the engine. It is recommended that a high quality in-line fuel filter be installed between the fuel tank and carburetor. Near TDC Use to adjust the fuel mixture when the throttle is fully open. (*3½ Turns from fully closed) MID NEEDLE (MIXTURE CONTROL VALVE) 2 Do not forget to clean or replace filters regularly to remove the dirt and other material that For changing the fuel mixture at mid speed and acceleration. DO NOT rotate the screw more can accumulate. Additionally, the carburetor may require occasional maintenance. than one turn. (*2¾ turns from fully closed) 3 At the end of each operating session, drain out any remaining fuel from the fuel tank. LOW SPEED NEEDLE (METERING NEEDLE) Then restart the engine to burn off any fuel that may remain inside the engine. Repeat this procedure until the engine fails to start. This should be performed while the engine Piston For adjusting the fuel mixture at partial throttle and idle speed to obtain steady idling and is still warm. smooth acceleration to mid speed. (*5½ turns from fully closed) Cylinder Liner

IDLE SCREW (THROTTLE STOP SCREW) 4 Remove the glow plug and inject a small amount of after-run oil into the engine from the glow plug hole in the combustion chamber. Then turn over the engine with the starter box For setting the minimum idle speed. This is adjusted at the factory. for 4 to 5 seconds to distribute the oil to the working parts inside the engine. Carburetor Restrictor (Venturi) NOTE: We recommend Crankshaft NOTE: Do not inject after run oil in through the carburetor, as this may cause the you double check carburetor o-rings to deteriorate. These procedures will reduce the risk of starting the needle settings Slight taper difficulties or corrosion after a period of storage. prior to beginning the High Speed break in process. The settings are set at 7 8 Needle 5 Finally, when cleaning the exterior of the engine, use an approved nitro cleaner. Do not use the factory, but slight Slide Boot gasoline, kerosene, or any petroleum based chemical as this could damage engine seals (Needle Valve) readjustment may be and other components. necessary to allow Mid Needle Idle Screw for changes in fuel (Mixture Control Valve) formula, gear ratio or (Throttle Stop Screw) NOTE: This engine uses a silicone ramped crankshaft. DO NOT use light oil, water- clutch engagement displacing oil, kerosene, or other petroleum based oils as an after run oil or to clean the point. crank, as this will permanently damage the silicone. Use alcohol or nitro fuel to clean the crank. When the engine is cold. When the engine is hot. O-Ring *Factory default settings. When screwing the needles all Ball Link the way in, the slide must be in Rotate the retainer the fully open position. nut gently until it stops

Tighten a further O-Ring 120º - 180º Retaining Screw Low Speed Needle (Metering Needle) Glowplug Thermo Insulator 11 24 Exhaust Dirt and dust may lodge in marked places Gasket Close Turn the high speed needle clockwise until it stops. This is the fully closed High Speed Do not allow position. Do not force it to turn further. Needle bottom of crankcase Open to touch chassis approx 0.5mm Element glows when energized Pliers Chamfer inside edges of bearers Approx. 0.5mm open factory setting with the restrictor removed. Carburetor Body Ball Link Replace the plug when the approx 1mm High Speed Needle Rotate the low speed needle until the head element does not glow or is sticks out 0.5mm from the ball link body. burnt out. This is the standard position. Glow Plug Igniter Low Speed Needle Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. Idle Screw Deliver fuel to the carburetor High speed needle position when starting the engine. Low Speed Needle Close the high speed 30º First rotate the mid needle until its slotted needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE Needle head is ush with the carburetor body. This is the Fuel Tank Side 30° as needed. This Fuel standard position. procedure will be repeated Open Close Open Close several times throughout the break-in process. Mid Needle 2¾ turns out. Make adjustments with the slide in the open position! More fuel Less fuel More fuel Less fuel Carburetor Body Near TDC

Piston Cylinder Liner

Carburetor Restrictor (Venturi) Crankshaft Slight taper High Speed

7 8 Needle (Needle Valve) Slide Boot

Mid Needle Idle Screw (Mixture Control Valve) (Throttle Stop Screw)

When the engine is cold. When the engine is hot. O-Ring Ball Link Rotate the retainer nut gently until it stops

Tighten a further O-Ring 120º - 180º Retaining Screw Low Speed Needle (Metering Needle) Glowplug Thermo Insulator

Exhaust Dirt and dust may lodge in marked places Gasket Close • After the break in period, a leaner needle setting may be required to maintain maximum Turn the high speed needle clockwise performance. GLOW PLUG until it stops. This is the fully closed High Speed Do not allow position. Do not force it to turn further. CARBURETOR CLEANLINESS bottom of crankcase Since the chosen glow plug and fuel type will effect performance and reliability, it will Needle The small fuel orifices must be kept clear to ensure correct carburetor function. Open to touch chassis be worthwhile to test with different plugs to find the best plug for your application. We recommend the ProTek R/C P3 plug. Carefully install the plug finger tight before final • REALIGNMENT OF THE LOW SPEED NEEDLE & MID NEEDLE tightening with the correct size plug wrench. approx 0.5mm When making carburetor adjustments, it is possible that the low speed needle and mid Element glows when energized needle may be inadvertently screwed in or out too far and thereby moved beyond the Pliers effective adjustment range. The basic positionsChamfer can be inside found edgesby rotating of bearers the low speed THE ROLE OF THE GLOW PLUG Approx. 0.5mm open needle until its slotted head is flush with the ball link body. With a glow plug engine, ignition is initiated when a 1.5 volt power source is connected to factory setting with the the plug. When the engine is running and the power is disconnected, the heat retained within restrictor removed. the combustion chamber remains sufficient to keep the plug filament glowing. This keeps the engine running. Ignition timing is automatic. This means under reduced load and higher RPM, Carburetor Body Ball Link the plug gets hotter and fires the fuel/air charge earlier in the piston stroke; at reduced RPM the plug becomes cooler and ignition is retarded firing the charge later in the stroke. Replace the plug when the approx 1mm High Speed Needle Rotate the low speed needle until the head element does not glow or is sticks out 0.5mm from the ball link body. GLOW PLUG LIFE burnt out. This is the standard position. In the case of high performance nitro engines, glow plugs must be regarded as expendable items. However, plug life can be extended and engine performance maintained by careful Glow Plug Igniter use, i.e.: Low Speed Needle • Use a plug suitable for the engine. Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. • Use fuel containing a moderate percentage of nitromethane, unless more is essential for Idle Screw Deliver fuel to the carburetor High speed needle position when racing events. starting the engine. Low Speed Needle Close the high speed • Do not run the engine too lean and do not leave the igniter battery connected while making 30º First rotate the mid needle until its slotted needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE needle adjustments. Needle head is ush with the carburetor body. This is the Fuel Tank Side 30° as needed. This Fuel standard position. Open Close WHEN TO REPLACE THE GLOW PLUG procedure will be repeated Close Open Apart from when actually burnt out, a plug may need to be replaced because it no longer several times throughout delivers its best performance, such as when: the break-in process. Mid Needle 2¾ turns out. Make adjustments with the slide in the open position! • Filament surface is rough and has turned white. More fuel Less fuel More fuel Less fuel Carburetor Body • Filament coil has become distorted.

• Foreign matter has adhered to filament or plug body has corroded.

• Engine tends to cut out when idling.

• Engine becomes more difficult to start.

23 12 Near TDC

Piston Cylinder Liner

Carburetor Restrictor (Venturi) Crankshaft Slight taper High Speed • With the engine running, close the throttle and allow it to idle for about five seconds Needle INSTALLATION7 OF8 THE and then open the throttle to the full throttle position. If, at this point, the engine puffs out (Needle Valve) Slide Boot STANDARD ACCESSORIES excessive smoke and the vehicle does not accelerate smoothly and rapidly, it is likely that the idle mixture is too rich. In this case, turn the low speed needle clockwise 45-90°. If the Mid Needle engine speeds up momentarily and then cuts out abruptly when the throttle is opened, the Idle Screw idle mixture is too lean. Correct this by turning the low speed needle counter clockwise 45-90°. (Mixture Control Valve) (Throttle Stop Screw) INSTALL THE GLOW PLUG Insert the included plug into the heatsink head carefully making sure that it is not cross threaded before tightening firmly. When the engine is cold. When the engine is hot. NOTE: Low speedO-Ring needle adjustments should be made in increments no more than INSTALL THE INCLUDED EXHAUST GASKET. 45-90°, carefully checking the effect on throttle response with each small adjustment. Ball Link Rotate the retainer nut gently until it stops • Carry out adjustments patiently under actual running conditions, until the engine responds quickly and positively to the throttle inputs. Tighten a further O-Ring 120º - 180º Retaining Screw Low Speed Needle WARNING! (Metering Needle) Glowplug Thermo Insulator Mixture adjustments (whether via the low speed needle, or the high speed needle), cannot be made accurately under ‘no load’ conditions.Dirt These and adjustments dust may arelodge not in marked places Exhaust recommended and carry’s the risk of seriously damaging the engine through over Gasket revvingClose and overheating. Turn the high speed needle clockwise until it stops. This is the fully closed High Speed Do not allow position. Do not force it to turn further. • With the optimum mixture controlNeedle position, light smoke is visible during high speed running bottom of crankcase and theOpen engine RPM increases steadily during acceleration. Remember, if the engine is to touch chassis operated with a lean fuel/air mixture, it will overheat and run unevenly. It is advisable to set One 0.1mm cylinder head shim and one 0.2mm head shim are installed in the engine when it bothapprox the high 0.5mm speed needle and low speed needle slightly on the rich side of the best RPM leaves the factory. An additional 0.1mm head shim is supplied with the engine. You may add setting as a safety measure. it for break in, whenElement you are tryingglows to when achieve energized increased run time at thePliers expense of a loss in Chamfer inside edges of bearers power, or if the glow plug tends to burn out due to high temperature and/or high humidity.Approx. 0.5mm open • If the engine runs too fast with the throttle closed, the idle screw should be factory setting with the turned counter-clockwise to reduce the throttle opening. INSTALLING THE CARBURETOR REDUCER restrictor removed. Choose the reducer according to the track conditions. Carburetor Body Ball Link • 7mm Installed fromReplace the factory. the plug when the approx 1mm High Speed Needle Rotate the low speed needle until the head • 8mm Included inelement package. does not glow or is sticks out 0.5mm from the ball link body. burnt out. This is the standard position. INSTALLATION OF THE DUST CAP SET If the engine is going to be stored,Glow install Plug the includedIgniter exhaust and carburetor dust caps to prevent debris or other foreign matter from getting inside the engine. Low Speed Needle 13 Slide Valve 225.5 turns out. Make adjustments with the slide in the open position. Idle Screw Deliver fuel to the carburetor High speed needle position when starting the engine. Low Speed Needle Close the high speed 30º First rotate the mid needle until its slotted needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE Needle head is ush with the carburetor body. This is the Fuel Tank Side 30° as needed. This Fuel standard position. procedure will be repeated Open Close Open Close several times throughout the break-in process. Mid Needle 2¾ turns out. Make adjustments with the slide in the open position! More fuel Less fuel More fuel Less fuel Carburetor Body Near TDC

Piston Cylinder Liner

Carburetor Restrictor (Venturi) Crankshaft Slight taper High Speed

7 8 Needle (Needle Valve) Slide Boot

Mid Needle Idle Screw (Mixture Control Valve) (Throttle Stop Screw)

When the engine is cold. When the engine is hot. O-Ring Ball Link Rotate the retainer nut gently until it stops

Tighten a further O-Ring Near TDC 120º - 180º Retaining Screw Low Speed Needle (Metering Needle) Glowplug Thermo Insulator

Exhaust Dirt and dust may lodge in marked places Gasket Close Turn the high speed needle clockwise Piston until it stops. This is the fully closed High Speed Cylinder Liner Do not allow position. Do not force it to turn further. Needle bottom of crankcase Open to touch chassis Carburetor Restrictor (Venturi) approx 0.5mm Crankshaft Element glows when energized Pliers Chamfer inside edges of bearers Approx. 0.5mm open FINAL ADJUSTMENT INSTALLATIONSlight taper OF factory setting with the THE CARBURETOR High Speed restrictor removed. • Final adjustment should be performed only after the break-in has been completed. 7 8 Needle Carburetor Body Slide Boot Ball Link The carburetor is only lightly installed into the intake boss when it leaves the factory. Follow (Needle Valve) Replace the plug when the Near TDC the steps below to complete the installation. approx 1mm High Speed Needle Rotate the low speed needle until the head Mid Needle element does not glow or is sticks out 0.5mm from the ball link body. Idle Screw burnt out. 1 Loosen the retainer screw, rotate the carburetor into the position that best suits your (Mixture Control Valve) (Throttle Stop Screw) This is theapplication standard and position. make sure that it is fully seated into the intake boss, compressing the rubber gasket. Glow Plug Igniter 2 GentlyWhen turnthe theengine retainer is cold. screw until it stops, then tighten it an additional 120° - 180°. Do LowPiston Speed Needlenot over tighten the screw as this willWhen damage the engine the carburetor is hot. body. O-Ring Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. Cylinder Liner Ball Link Idle Screw Rotate the retainer Deliver fuel to the carburetor High speed needle position when starting the engine. Low Speed Needle nut gently until it stops Close the high speed 30º First rotate the mid needle until its slotted needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE Tighten a further O-Ring Carburetor Restrictor (Venturi) Needle head is ush with the carburetor body. This is the Fuel Tank Side 30° as needed. This Crankshaft 120º - 180º Retaining Screw Low Speed Needle Fuel standard position. procedure will be repeated Open Close Open Close (Metering Needle) Slight taper Glowplug Thermo Insulator several times throughout the break-in process. Mid Needle Dirt andHigh dust Speed may lodge in marked places 2¾ turns out. Make adjustmentsExhaust with the slide in the open position! 7 8 Close Needle More fuel Less fuel More fuel Less fuel Carburetor Body Gasket (Needle Valve) Slide Boot NOTE: Be careful not Turnto damage the high the o-ringsspeed needlewhen removing clockwise the carburetor retainer from the engine. Do not pushuntil the it part stops. in or This it could is the damage fully closedthe o-rings. Do not allow High Speed Mid Needle Idle Screw • Run the vehicle down the longest straight away at full throttle to observe the speed. Bring position. Do not force it to turn further. bottom of crankcase the car back to the starting point, close the high speed needle 30° and repeat the run, Needle (Mixture Control Valve) (Throttle Stop Screw) taking note of the improvement in performance. Open to touch chassis

• Continue with additional runs, gradually reducing the high speed needle setting with a goal approx 0.5mm to achieve the highest straight line speed. Remember thatWhen if the thehigh engine speed needleis cold. is shut When the engine is hot. O-Ring too far the engine will run lean and overheat, accompanied by visibly diminishedElement exhaust glows when energized Pliers Chamfer inside edges of bearers Approx. 0.5mm open smoke. At this point the model will begin to lose speed. If this happens, throttle down Ball Link immediately, stop the vehicle and open the high speed needle 45-90°. Rotate the retainer factory setting with the nut gently until it stops restrictor removed. Carburetor Body Tighten a further O-Ring Ball Link Replace the plug when the Low Speed Needle 120º - 180º approx 1mm Retaining ScrewHigh Speed Needle Rotate the low speed needle until the head element does not glow or is (Metering Needle) Glowplug Thermo Insulator sticks out 0.5mm from the ball link body. burnt out. This is the standard position. 21 14 Exhaust Glow Plug Igniter Dirt and dust may lodge in marked places Gasket Close Turn the high speed needle clockwise Low Speed Needle until it stops. This is the fully closed Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. High Speed Do not allow position. Do not force it to turn further. Idle Screw Deliver fuel to the carburetor High speed needleNeedle position when bottom of crankcase Openstarting the engine. Low Speed Needle to touch chassis Close the high speed 30º First rotate the mid needle until its slotted needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE approxNeedle 0.5mm head is ush with the carburetor body. This is the Fuel Tank Side 30° as needed. This Element glows when energized Pliers Fuel Chamfer inside edges of bearers standard position. Approx. 0.5mm open procedure will be repeated Open Close Open Close factory setting with the several times throughout restrictor removed. the break-in process. Mid Needle 2¾ turns out. Make adjustments with the slide in the open position! Carburetor Body More fuel Less fuel BallMore Link fuel Less fuel Carburetor Body Replace the plug when the approx 1mm High Speed Needle Rotate the low speed needle until the head element does not glow or is sticks out 0.5mm from the ball link body. burnt out. This is the standard position. Glow Plug Igniter Low Speed Needle Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. Idle Screw Deliver fuel to the carburetor High speed needle position when starting the engine. Low Speed Needle Close the high speed 30º First rotate the mid needle until its slotted needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE Needle head is ush with the carburetor body. This is the Fuel Tank Side 30° as needed. This Fuel standard position. procedure will be repeated Open Close Open Close several times throughout the break-in process. Mid Needle 2¾ turns out. Make adjustments with the slide in the open position! More fuel Less fuel More fuel Less fuel Carburetor Body Near TDC

Piston Cylinder Liner

Carburetor Restrictor (Venturi) Crankshaft Slight taper High Speed

7 8 Needle (Needle Valve) Slide Boot

Mid Needle Idle Screw (Mixture Control Valve) (Throttle Stop Screw)

When the engine is cold. When the engine is hot. O-Ring Ball Link Rotate the retainer nut gently until it stops

Tighten a further O-Ring 120º - 180º Retaining Screw Low Speed Needle (Metering Needle) Glowplug Thermo Insulator

Exhaust Dirt and dust may lodge in marked places Close Near TDC Gasket Turn the high speed needle clockwise until it stops. This is the fully closed High Speed Do not allow position. Do not force it to turn further. Needle bottom of crankcase Open to touch chassis

Piston approx 0.5mm Cylinder Liner Element glows when energized Pliers Chamfer inside edges of bearers Approx. 0.5mm open factory setting with the restrictor removed. Carburetor Restrictor (Venturi) Carburetor Body Crankshaft Ball Link Replace the plug when the approx 1mm Rotate the low speed needle until the head Slight taper High Speed Needle element does not glow or is sticks out 0.5mm from the ball link body. High Speed burnt out. This is the standard position. Needle 7 8 Glow Plug Igniter (Needle Valve) Slide Boot Low Speed Needle Mid Needle Idle Screw Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. (Mixture Control Valve) (Throttle Stop Screw) Idle Screw ENGINE INSTALLATION Deliver fuel to the carburetor High speed needle position when starting the engine. Low Speed Needle Close the high speed 30º First rotate the mid needle until its slotted When the engine is cold. When the engine is hot. Make sure that the vehicles engine mount surfaces are level, and on the same plane. needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE O-Ring Needle head is ush with the carburetor body. This is the Poor installation may cause distortion of the crankcase, bearings, etc, resulting in erratic Fuel Tank Side 30° as needed. This Fuel standard position. performance and permanent damage. Ball Link procedure will be repeated Open Close Open Close Rotate the retainer several times throughout nut gently until it stops The recommended screws for securing the engine are Allen head, hexagon socket type 3mm or 4-40 steel screws. the break-in process. Mid Needle O-Ring 2¾ turns out. Make adjustments with the slide in the open position! Tighten a further More fuel Less fuel More fuel Less fuel Retaining Screw If existing holes in the engine mount do not align perfectlyLow with Speed the engineNeedle mounting lugs in Carburetor Body 120º - 180º the crankcase, enlarge the holes in the lugs slightly with a needle file so that the screws are (Metering Needle) NOTE: In the event that you replace any of the major engine components (piston, Glowplug perfectly aligned with theThermo engine Insulator mount holes. sleeve, con rod, crankshaft or bearings), a brief break-in should be performed. If you change to a fuel with higher nitro content, the engine will need to be re-tuned. Exhaust Dirt and dust may lodge in marked places Gasket Close HOW TO STOP THE ENGINE Turn the high speed needle clockwise To stop the engine during normal operation, reduce the throttle to neutral, flip the car over until it stops. This is the fully closed and push a blunt rubber object against the flywheel.DO NOT use your fingers! High Speed Do not allow position. Do not force it to turn further. Needle bottom of crankcase Open to touch chassis WARNING! approx 0.5mm Do not touch rotating parts, the engine, or the tuned pipe; these components get extremely hot and contact with them may result in a serious burn or other injury. Element glows when energized Pliers Chamfer inside edges of bearers Approx. 0.5mm open factory setting with the restrictor removed. • Do not allow the bottom of the crankcase to touch the chassis. Carburetor Body Ball Link• If needed, chamfer the inside edges of the engine mounts for clearance. Replace the plug when the approx 1mm High Speed Needle Rotate the low speed needle until the head element does not glow or is sticks out 0.5mm from the ball link body. burnt out. This is the standard position. Glow Plug Igniter Low Speed Needle Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. Idle Screw Deliver fuel to the carburetor High speed needle position when starting the engine. Low Speed Needle Close the high speed 30º First rotate the mid needle until its slotted needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE Needle head15 is ush with the carburetor body. This is the 20 Fuel Tank Side 30° as needed. This Fuel standard position. procedure will be repeated Open Close Open Close several times throughout the break-in process. Mid Needle 2¾ turns out. Make adjustments with the slide in the open position! More fuel Less fuel More fuel Less fuel Carburetor Body Near TDC

Piston Cylinder Liner

Carburetor Restrictor (Venturi) Crankshaft Slight taper High Speed

7 8 Needle (Needle Valve) Slide Boot

Mid Needle Idle Screw (Mixture Control Valve) (Throttle Stop Screw)

When the engine is cold. When the engine is hot. O-Ring Ball Link Rotate the retainer nut gently until it stops

Tighten a further O-Ring 120º - 180º Retaining Screw Low Speed Needle (Metering Needle) Glowplug Thermo Insulator

approx 0.5mm Element glows when energized Pliers Chamfer inside edges of bearers Approx. 0.5mm open factory setting with the restrictor removed. Carburetor Body Ball Link Replace the plug when the approx 1mm High Speed Needle Rotate the low speed needle until the head element does not glow or is sticks out 0.5mm from the ball link body. burnt out. This is the standard position. Glow Plug Igniter Low Speed Needle Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. Idle Screw Deliver fuel to the carburetor High speed needle position when starting the engine. Low Speed Needle Close the high speed 30º First rotate the mid needle until its slotted needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE Needle head is ush with the carburetor body. This is the Fuel Tank Side 30° as needed. This Fuel standard position. procedure will be repeated Open Close Open Close STARTING & BREAKING-IN NOTE: It is incredibly important to set the throttle to the neutral several times throughout position before starting the engine. If the engine is allowed to run THE ENGINE the break-in process. Mid Needle with the throttle open too far under “no load” conditions (i.e. with 2¾ turns out. Make adjustments with the slide in the open position! the driving wheels not in contact with the ground), the engine may overheat and could be damaged. More fuel Less fuel More fuel Less fuel Carburetor Body WHILE OPERATING • DO NOT drive the model on a public street! This can cause serious accidents, personal injuries and/or property damage. HEAT CYCLE BREAK-IN METHOD • DO NOT operate near pedestrians or small children.

The purpose of this break in method is to heat cycle the engine without subjecting the • DO NOT operate in small or confined areas. components to the stress that comes from breaking-in an engine that is overly rich and cold. You want the engine to reach temperatures in the low 200°F (93ºC) range to reduce stress • DO NOT operate in areas where loud noises can disturb others, such as residential areas. on the components. WARNING Pre-heat the engine to approximately 150°-160°F (66º-71°C) using an engine heater or heat gun before starting for the first time and pre-heat the engine each time you start it during the Before starting the engine, make sure all fasteners are tight, especially those at joints and break-in process. Additionally, if you have trouble keeping the temperature in the 200°F range moving parts, such as the throttle arm. Loose fasteners are often the source of damaged while the engine is running, it may be beneficial to wrap the cooling head with an insulator components and could lead to injury and/or property damage. of some type, such as tin foil, or an old sock. This will help the engine retain heat and reach 200°F while it is tuned with the rich needle settings.

After a brief warm up period, disconnect the glow plug igniter and run the car on the track BREAKING-IN for approximately 3 minutes at low speed. If the engine stalls, increase the amount of throttle The break-in procedure is performed to prepare the engine for running conditions (fuel, being applied slightly. If the engine stalls because it is excessively rich, close the needle valve RPM, engine temperature, etc). Excessively rich and prolonged low speed running should be 30° and try again. When the 3 minutes are up, shut the engine down, verify that the piston avoided. Running at low speeds and low temperatures for prolonged periods of time will have is at the bottom of the stroke (Bottom Dead Center - BDC) and let it cool completely. Once a negative effect on the performance and lifespan of your engine. the engine has cooled down, close the needle valve 30°, start it again and run the car for another 3 minutes, let it cool off with the piston at BDC. Repeat 3 more times for a total of 15 PRESSURIZED FUEL SYSTEM minutes (five 3 minute cycles), keeping an eye on the temperature and making sure it is in the • The constant changes in vehicle attitude that occur in off-road conditions, combined low 200° range. Now increase the run time to 4 minute intervals and close the needle valve with the distance between the fuel tank and carburetor can negatively affect performance. as needed to prevent the engine from running overly rich. Vary the RPM, gradually increasing Because of this, it is recommended that only a muffler with a pressurized fuel feed system speed, and make sure that the temperature is in the low 200° F range. Run at 4 minute be used. intervals, five cycles, for a total of 20 minutes. After this the engine is ready for race tuning. • Never run your vehicle without installing the air filter. The dust and dirt that will be drawn into the engine will cause permanent damage to the components. NOTE: During the first few cycles, it is important that you use smooth throttle inputs and do not “spike” the throttle to protect the bearings.

19 16 Near TDC

Piston Cylinder Liner

Carburetor Restrictor (Venturi) Near TDC Crankshaft Slight taper High Speed

7 8 Needle (Needle Valve) Slide Boot Piston Cylinder Liner Mid Needle Idle Screw Near TDC (Mixture Control Valve) (Throttle Stop Screw)

Carburetor Restrictor (Venturi) Crankshaft When the engine is cold. When the engine is hot. O-Ring Slight taper Piston Ball Link Rotate the retainer Cylinder Liner High Speed nut gently until it stops 7 8 Needle (Needle Valve) Tighten a further Slide Boot O-Ring 120º - 180º Retaining Screw Low Speed Needle Mid Needle Idle Screw Carburetor Restrictor (Venturi) (Metering Needle) Crankshaft Glowplug Thermo Insulator (Mixture Control Valve) (Throttle Stop Screw) Slight taper Exhaust Dirt and dust may lodge in marked places Gasket Close High Speed Near TDC When the engine is cold. When the engine is hot. Turn the high speed needle clockwise Near TDC 7 8 O-Ring Needle until it stops. This is the fully closed Slide Boot High Speed (Needle Valve) Do not allow position. Do not force it to turn further. Ball Link Rotate the retainer Needle bottom of crankcase Open Mid Needle nut gently until it stops Idle Screw to touch chassis (Mixture Control Valve) (Throttle Stop Screw) O-Ring Piston Tighten a further approx 0.5mm Piston Retaining Screw Low Speed Needle 120º - 180º Element glows when energized Pliers Chamfer inside edges of bearers Cylinder Liner Approx. 0.5mm open (Metering Needle) Cylinder Liner Glowplug When the engine is cold. When the engine is hot. Thermo Insulator O-Ring factory setting with the restrictor removed. Ball Link Exhaust Rotate the retainer Dirt and dust may lodge in marked places Close Carburetor Restrictor (Venturi) Carburetor Body The following procedure is recommended for this engineGasket when the ProTek R/C P3, • Low speed needle (meteringnut gently needle) until and it mid stops needle (mixture controlCarburetor valve) Restrictorare set at the (Venturi) Ball Link CrankshaftPTK-2060 or PTK-2090 tuned pipe and fuel containing up to 30% nitromethaneTurn the are high used. speed needle clockwisebasic position (refer to P23). Crankshaft Replace the plug when the approx 1mm Rotate the low speed needle until the head until it stops. This is the fully closed O-Ring Do not allowHigh Speed Needle Slight taper• Identify and note the flywheel position when the piston is at Bottom Dead Center (BDC). • Switch the transmitter on andHigh make Speed sure thatelement the linkage does movesnot glowTighten correctly. or is a further sticks out 0.5mm from the ball link body. Slight taper position. Do not force it to turn further. Retaining Screwbottom of crankcase Low Speed Needle Needle burnt out. 120º - 180º This is the standard position. Open High Speed (Metering Needle) • Fill the tank completely with fuel. Glowplug • Pre-heat the engine to approximately 150°-160°FHigh Speed (66º-71°C) using an engine heater or heat to touch chassis Thermo Insulator 7 8 gun before starting. Needle Glow Plug Igniter 7 8 • Check the glow plug and verify that the filament glows bright red when the igniter is attached. Needle Slide Boot approx 0.5mm (Needle Valve) Slide Boot • Plug the stingerExhaust on the exhaust and (Needle Valve) Dirt and dust may lodge in marked places Low Speed Needle Element glows when energized Chamfer inside edges of bearers Pliers turn the engineGasket over with the starter Mid Needle Close Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. Approx. 0.5mm open box to draw fuel into the engine. Mid Needle Idle Screw Turn the high (Mixturespeed needle Control clockwise Valve) Idle Screw factory setting with the (Throttle StopHigh Screw)speed needle position when Idle Screw until it stops.(Mixture This is theControl fullyDeliver Valve)closed fuel to the carburetor(Throttle Stop Screw) restrictor removed. • Now connect the glow plug igniter to startingHigh the Speed engine. Low Speed Needle Do not allow heat the plug and start the engine.position. Do not force it to turn further. Close the high speed bottom of crankcase Carburetor Body Needle 30º First rotate the mid needle until its slotted Open Ball Link needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE to touch chassis When the engine is cold. When the engine is hot. O-Ring If the engine does not start, or Needle head is ush with the carburetor body. This is the When the engine is cold. WhenReplace the theengine plug is when hot. the Fuel Tank Side 30° as needed. This O-Ring approx 1mm stalls out right after started, try Fuel Rotate the low speed needle until the head standard position. High Speed Needle Open Close element does not glow or is the following: approxBall 0.5mm Link sticks out 0.5mm fromprocedure the ball will link be body. repeated Close Open Rotate the retainer Ball Link Rotate the retainerburnt out. Element glows when energized Pliers This is the standardseveral position. times throughout Chamfer inside edges of bearers nut gently until it stops Set the high speed needle approximatelyApprox. 2.5 0.5mm turns open open from the fully closed position. Do Mid Needle nut gently until it stops the break-in process. not force the high speed needle to turnfactory beyond setting a lightly with closed the position. 2¾ turns out. Make adjustments with the slide in the open position! Glow Plug Igniter O-Ring Tighten a further More fuel Less fuel More fuel Less fuel Carburetor Body Tighten a further O-Ring Set the throttle opening a little widerrestrictor than the factoryremoved. setting by adjusting the idle screw The carburetor is set at the factory120º as shown- 180º in the images below. Double check the Retaining Screw Low SpeedLow Needle Speed Needle Retaining Screw (throttle stop screw). Low Speed Needle Carburetor Body settings before you start the engine.120º - 180º Slide (MeteringValve 5.5 Needle) turns out. Make adjustments with the slide in the open position. Glowplug Thermo Insulator (Metering Needle) Ball Link Glowplug Replace the plug when the Idle Screw Thermo Insulator • The high speed needle (needleDeliver valve) fuel is set to approximatelythe carburetor 3-turnsHigh open speed from needle the fully position when approx 1mm High Speed Needle Rotate the low speed needle until the head closed position. starting the engine.element Dirt does and not dust glow may or lodgeis in marked places Low Speed Needle sticks out 0.5mm from the ball link body. Exhaust burnt CloseDirtout. and the dust high may speed lodge in marked places Exhaust Close 30º First rotate the mid needle until its slotted This is the standard position. Gasket Close needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE Gasket Turn the high speed needle clockwise Needle head is ush with the carburetor body. This is the Turn the high speed needle clockwiseFuel Tank Side 30° as needed.Glow Plug This Igniter until it stops. ThisFuel is the fully closed Do not allow standard position. until it stops. This is the fully closed High Speed procedure will be repeated Open Close Open CloseDo not allow position. Do not force it to turn further. High Speed bottom of crankcase Low Speed Needle position. Do not force it to turn further. Needle several times throughout bottom of crankcase Open Needle to touch chassis Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. Open the break-in process.• When the engine starts, warm it up using smooth throttle inputs,to touch increasing chassis the rpm to Mid Needle • Idle gap is set approximately 0.5mm open. 2¾ Idleturns Screwout. Make adjustments with the slide in the open position! Deliver fuel to themedium carburetor speed andHigh back speed to a fast needle idle in position the neutral when position with the mixture set rich. approx 0.5mm LeaveMore the glow fuel plugstarting igniterLess theconnected,fuel engine.More and fuelkeep theLess wheels fuel of the car offCarburetor the ground. Body Low Speed Needle Element glows when energized approx 0.5mm Chamfer Closeinside theedges high of speed bearers Pliers The slightly rich mixture will provide adequate30º lubrication and cooling indicated by profuse First rotate the mid needle until its slotted Element glows when energized Pliers Approx. 0.5mm open exhaust smoke. Chamfer insideneedle edges approximately of bearers HIGH SPEED NEEDLE LOW SPEED NEEDLE Approx. 0.5mm open Needle head is ush with the carburetor body. This is the factory setting with the Fuel Tank Side 30° as needed. This factory setting with the Fuel standard position. restrictor removed. procedure will be repeated Open Close Open Close restrictor removed. Carburetor Body several times throughout Carburetor Body Ball Link Ball Link the break-in process. Mid Needle Replace the plug when the approx 1mm Rotate the low speed needle until the head 2¾ turns out. Make adjustments with the slide in the open position! Replace the plug when the • The opening should be approximately 0.5mm withHigh the Speed restrictor Needle removed. Rotate the low speed needle until the head element does not glow or is approx 1mm High Speed Needle sticks out 0.5mm from the ball link body. More fuel Less fuel More fuel Less fuel Carburetor Body element does not glow or is 17 sticks out 0.5mm from the ball link body. 18 burnt out. This is the standard position. burnt out. This is the standard position. Glow Plug Igniter Glow Plug Igniter Low Speed Needle Low Speed Needle Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. Slide Valve 5.5 turns out. Make adjustments with the slide in the open position. High speed needle position when Idle Screw Deliver fuel to the carburetor High speed needle position when Idle Screw Deliver fuel to the carburetor starting the engine. Low Speed Needle starting the engine. Close the high speed Low Speed Needle 30º Close the high speed First rotate the mid needle until its slotted 30º needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE First rotate the mid needle until its slotted Needle needle approximately HIGH SPEED NEEDLE LOW SPEED NEEDLE head is ush with the carburetor body. This is the Fuel Tank Side Needle 30° as needed. This head is ush with the carburetor body. This is the Fuel Fuel Tank Side 30° as needed. This standard position. Fuel procedure will be repeated Open Close Open Close standard position. procedure will be repeated Open Close Open Close several times throughout several times throughout the break-in process. Mid Needle the break-in process. Mid2¾ Needleturns out. Make adjustments with the slide in the open position! More fuel Less fuel More fuel Less fuel Carburetor Body2¾ turns out. Make adjustments with the slide in the open position! More fuel Less fuel More fuel Less fuel Carburetor Body