Contents of This Instruction Manual, So As to Familiarize Yourself with the Controls and Other Features of the Engine
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It is of vital importance, before attempting to operate your engine, to read the general 'SAFETY INSTRUCTIONS AND WARNINGS' section on pages 2-5 of this booklet and to strictly adhere to the advice contained therein. Also, please study the entire contents of this instruction manual, so as to familiarize yourself with the controls and other features of the engine. Keep these instructions in a safe place so that you may readily refer to them whenever necessary. It is suggested that any instructions supplied with the vehicle, radio control equipment, etc., are accessible for checking at the same time. CONTENTS SAFETY INSTRUCTIONS AND STARTING THE ENGINE & RUNNING-IN WARNINGS ABOUT YOUR O.S. ENGINE 2-5 ('Breaking-in) 18-22 ENGINE CONSTRUCTION, NOTES WHEN FINAL ADJUSTMENT 23-25 APPLYING AN ELECTRIC STARTER 6-7 CARE AND MAINTENANCE 26-27 ABOUT THE WARRANTY ABOUT THE ENGINE 8-9 TROUBLE SHOOTING 28-31 TOOLS, ACCESSORIES, etc. ENGINE EXPLODED VIEW &PARTS LIST 32-33 BASIC ENGINE PARTS 10-12 CARBURETOR EXPLODED VIEW &PARTS LIST 34-35 INSTALLATION OF THE STANDARD ACCESSORIES, GLOWPLUG 13-14 O.S. GENUINE PARTS & ACCESSORIES 36-37 THREE VIEW DRAWING 38 INSTALLATION , CARBURETOR CONTROLS 12F 15-17 1 SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE Remember that your engine is not a "toy", but a highly efficient internal- combustion machine whose power is capable of harming you, or others, if it is misused. As owner, you, alone, are responsible for the safe operation of your engine, so act with discretion and care at all times. If at some future date, your O.S. engine is acquired by another person, we would respectfully request that these instructions are also passed on to its new owner. The advice which follows applies basically to ALL MODEL ENGINES and is grouped under two headings according to the degree of damage or danger which might arise through misuse or neglect. ! WARNINGS ! NOTES These cover events which These cover the many other might involve serious (in possibilities, generally less obvious extreme circumstances, even sources of danger, but which, under fatal) injury. certain circumstances, may also cause damage or injury. 2 ! WARNINGS • Model engine fuel is poi- • Never operate your engine in an en- sonous. Do not allow it to closed space. Model engines, like come into contact with the automobile engines, exhaust deadly eyes or mouth. Always store carbon-monoxide. Run your engine it in a clearly marked con- only in an open area. tainer and out of the reach of children. • Model engines generate • Model engine fuel is also considerable heat. Do not highly flammable. Keep it touch any part of your away from an open flame, engine until it has cooled. excessive heat, sources of Contact with the muffler sparks, or anything else (silencer), cylinder head which might ignite it. Do not or exhaust header pipe, in smoke or allow anyone else particular, may result in a to smoke, near to it. serious burn. 3 ! NOTES • This engine is intended for model cars. • The wearing of safety glasses is also Do not attempt to use it for any other strongly recommended. purpose. • Mount the engine in your model • Take care that the glowplug clip or securely, following the manufacturers' battery leads do not come into contact recommendations, using appropriate with rotating parts. Also check that the screws and locknuts. linkage to the throttle arm is secure. • Install an effective silencer (muffler). • For their safety, keep all onlookers Frequent close exposure to a noisy (especially small children) well back exhaust (especially in the case of the (at least 20 feet or 6 meters) when more powerful highspeed engines) preparing your model for running. may eventually impair your hearing and such noise is also likely to cause annoyance to others over a wide area. 4 ! NOTES Before starting the engine, always check • Warning! Immediately after a glowplug- the tightness of all the screws and nuts ignition engine has been run and is still especially those of joint and movable warm, conditions sometimes exist parts such as throttle arm. Missing whereby it is just possible for the engine retightening the loose screws and nuts to abruptly restart if it is rotated over often causes the parts breakage that is capable of harming you. compression WITHOUT the glowplug battery being reconnected. • To stop the engine, fully retard the throttle stick and trim lever on the transmitter, or, in an emergency, cut off the fuel supply by pinching the fuel delivery line from the tank. 5 Near TDC ENGINE CONSTRUCTION With this engine, the piston will feel tight at the top of its stroke Piston (TDC) when the engine is cold. Cylinder Liner This is normal. The cylinder bore has a slight taper. The piston and cylinder are designed to Crankshaft achieve a perfect running Slight taper clearance when they reach operating temperature. When the engine is cold. When the engine is hot. 6 NOTES WHEN APPLYING AN ELECTRIC STARTER Do not over-prime. This could cause a hydraulic lock and damage the engine on application of the electric starter. If over-primed, remove glowplug, close needle-valve and apply starter to pump out surplus fuel. Cover the head with a rag to prevent any pumped out fuel from getting into your eyes. 7 NOTES ON OPERATION While Operating GUARANTEE Please do not run on a public street, this This engine is constructed from the very could cause serious accidents, personal best materials available and to the very injuries and/or propetry damage. highest engineering standards, using the most advanced precision machinery. Please do not run near pedestrians or However, the extremely high stresses small children. imposed by car racing operation under Please do not run in small or confined very severe conditions, as well as areas. stresses which are exacerbated by the Please do not run where loud noises can use of powerful fuels containing very disturb others, such as hospitals and high concentrations of nitromethane, residential areas. constitute hazards which are beyond a manufacturer's control. Accordingly, we regret that it is not possible to extend NOTE our usual warranty terms to this As delivered, the engine has the particular engine -i.e. no guarantee is carburetor lightly fit into its intake. offered against material wear, or damage Secure it changing its angle according resulting therefrom, in actual use. to the car chassis. 8 ABOUT THE ENGINE The MAX-12XZ is developed basing on the Standard accessories O.S. Speed 12XZ. All the major parts are newly designed for increased torque at low Glow Plug RP6 T-type head (Turbo head) to mid speed. Crankshaft has an improved 1piece counter-balance shape and more efficient intake port. Connecting rod employs a new material and crankcase has an improved Carburetor Reducer (5.5mm Black) shape for increased strength. Liner ports W/ "O" Ring have been improved for increased torque. Inner head and carburetor are designed to match these improvements. Like other O.S. Exhaust Seal Ring 1piece engines, this engine achieves both easy handling and high performance. Dust Cap Set 3mm 1piece 16mm 2pcs. 9 TOOLS, ACCESSORIES, etc. The following items are necessary for operating the engine. Model engine fuel is also highly Items necessary for starting flammable. Keep it away from open FUEL ! flame, excessive heat, sources of sparks, Generally, it is suggested that the user selects a fuel or anything else which might ignite it. Do that is commercially available for model two-stroke not smoke or allow anyone else to engines and contains 10-30% nitromethane. As a smoke, near to it. starting point, we recommend a fuel containing 20% nitromethane, changing to a fuel containing more FUEL FILTER nitro if necessary. When the brand of fuel is changed, To be installed in the fuel line or the nitro content increased, it is advisable to between fuel tank and carburetor repeat the running-in procedure referred to in the to prevent dust from entering the RUNNING-IN paragraphs. Please note that with carburetor. high-nitro fuels, although power may be increased for competition purposes, GLOWPLUG IGNITER glowplug elements do not last as long Commercialy available handy and engine life will be shortened. glowplug heater in which the REMINDER! glowplug battery and battery leads are integrated. Model engine fuel is poisonous. Do not allow it to come into contact with the ! eyes or mouth. Always store it in a STARTER BOX clearly marked container and out of the For starting the engine. reach of children. 10 BATTERIES FOR STARTER BOX TOOLS Batteries for starter box.Select HEX SCREWDRIVER according to the starter box Necessary for engine installation. used. Be sure to fully charge 1.5mm, 2mm, 2.5mm, 3mm before using. FUEL PUMP SCREWDRIVER For filling the fuel tank, a simple, Necessary for carburetor adjustments. polyethylene "squeeze" bottle, No.1, No.2, etc with a suitable spout, is required. LONG SOCKET WRENCH WITH PLUG GRIP SILICONE FUEL LINE Heatproof silicone tubing of Recommended for easy removal and approx. 5mm o.d. and 2mm i.d. is replacement of the angled and recessed required for the connection glowplug, the O.S.Long Socket Wrench between the fuel tank and engine. incorporates a special grip. 11 BASIC ENGINE PARTS Outer Head Exhaust Cover Plate Carburetor Type 12F Crankshaft Mounting Lugs Crankcase Crankshaft Ball Bearing (Front) 12 INSTALLATION OF THE STANDARD ACCESSORIES Installing the glow plug. INSTALLATION OF THE DUST CAP SET Insert RP6 plug supplied If the engine is to be stored or out of use for a while, into heatsink-head care- install the included exhaust and carburetor dust caps to prevent foreign matter from entering the engine.