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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
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CONTENTS SAFETY INSTRUCTIONS AND IF THE ENGINE FAILS TO START 16 2~5 WARNINGS ABOUT YOUR O.S. ENGINE 16~17 FINAL ADJUSTMENT INTRODUCTION, BASIC ENGINE PARTS 6 CARBURETTOR CLEANLINESS 17~18 INSTALLATION 7~8 CARE AND MAINTENANCE 19 AIR CLEANER TYPE102 8~9 EXPLODED VIEW & NOTES CONCERNING ENGINE PARTS LIST 20~23 THE RECOIL STARTER 9~10 CARBURETOR EXPLODED VIEW 10~11 GLOWPLUG & PARTS LIST 24~25 TOOLS, ACCESSORIES, etc. 11~12 O.S. GENUINE PARTS & 26 ACCESSORIES CARBURETTOR CONTROLS 12~13 13 PRES
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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
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WARNINGS • • Never operate your engine in an en- Model engine fuel is poi- closed space. Model engines, like sonous. Do not allow it to automobile engines, exhaust deadly come into contact with the carbon-monoxide. Run your engine eyes or mouth. Always only in an open area. store it in a clearly marked container and out of the reach of children. Model engines generate • considerable heat. Do not • Model engine fuel is also touch any part of your highly flammable. Keep it engine unti
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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. Fit an effective silencer (muffler). • For their s
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NOTES • To stop the engine, fully retard the • Pull the operating handle straight out throttle stick and trim lever on the when starting the engine, so that the trans-mitter, or, in an emergency, cut cord does not rub against the vehicle off the fuel supply by pinching the fuel body or engine. This will help prevent delivery tube from the tank. the cord from being damaged by abrasion or engine heat. • Do not attempt to disassemble the recoil starter of the 15CV-X. • Warning! Immediate
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The MAX-12CV and MAX-12CV-X are BASIC ENGINE PARTS high-performance engines for 1/10 class R/C racing cars. The MAX-12CV-X Heatsink Head is equipped with a built-in recoil starter Carburetor system which eliminates the need for a separate electric and starter battery. Starter Handle NOTE: With this engine, the piston will feel tight at the top of its stroke when the engine is cold. This is normal. The piston and cylinder are designed to achieve a perfect running clearance when they rea
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Avoid forcing the screws. Secure with locknuts. ENGINE INSTALLATION If the bottom of the recoil starter housing would Make sure that the vehicle's engine mounting otherwise touch the car chassis, fit the engine surfaces are level and in the same plane. Poor mount spacers (supplied) between the engine's installation may cause distortion of the mounting lugs and the engine mount. Use the crankcase, bearings, etc., resulting in erratic M3x15 screws provided. With some vehicles, it running
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AIR CLEANER TYPE 102 INSTALLATION OF THE CARBURETOR This is a heavy-duty wet type air cleaner that has As delivered, the engine has its carburetor been developed specifically for the O.S. MAX-CV lightly fit into the intake boss. Secure it as series model car engines. follows. It contains specially impregnated filter elements which prevent highly damaging dust and dirt from being Loosen the retainer screw, rotate the 1. drawn into the engine through the carburetor, yet carburetor to its
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Position the air cleaner correctly, so that it does not Always remove contaminated elements carefully, to • foul the cylinder-head or obstruct the needle-valve. ensure that dirt cannot enter the carburettor. AIR CLEANER ELEMENTS NOTES CONCERNING THE RECOIL STARTER Replacement elements Lower Filter Upper Filter • ( 12CV-X ONLY) Element Element are already impregnated REMINDER! with filter oil. As this oil is Do not attempt to disassemble the recoil very sticky, take cere, starter. If you
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The role of the glowplug The starter prevents the engine from being With a glowplug engine, ignition is initiated by the rotated in the wrong direction.The unit will application of a 1.5-volt power source. When the be damaged if you attempt to force the battery is disconnected, the heat retained within the flywheel in the opposite direction (i.e. combustion chamber remains sufficient to keep the clockwise when viewed from the crankshaft plug filament glowing, thereby continuing to kee
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When to replace the glowplug As a starting point, we recommend a fuel containing 10- Apart from when actually burned out, a plug may 20% nitromethane, changing to a fuel containing more need to be replaced because it no longer delivers its nitro only if necessary. When the nitro content of the fuel best performance, such as when: is increased or the brand of fuel is changed, it is advisable to initially run the engine with a richer needle-valve Filament surface has roughened and turned whi
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ELECTRIC STARTER AND STARTER BATTERY ( ) CARBURETOR CONTROLS 10C Use an electric starter with 12-volt Three adjustable controls are provided on this battery for starting the MAX-12CV. carburetor. ¡ The Needle-Valve: For adjusting the mixture strength when the throttle LONG SOCKET WRENCH is fully open. ¡ Recommended for easy removal The Mixture Control Screw: and replacement of the angled For adjusting the mixture strength at part- throttle and idling speeds, to obtain steady and recessed g
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( ) CARBURETOR CONTROLS 10E-R PRESSURIZED FUEL SYSTEM Three adjustable controls are provided on this The somewhat violent changes of vehicle attitude • carburetor. that occur in off-road running, combined with the fact that, in buggy type cars, the fuel tank is often ¡ The Needle-Valve: located some distance from the carburetor, means For adjusting the mixture strength when the throttle that fuel 'head' at the carburetor can vary and upset is fully open. running.Therefore,it is recommended
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STARTING THE ENGINE & RUNNING-IN ('Breaking-in') The following procedure is suitable for these engines In case of the 10E-R caburettor approx 1mm when the O.S. T-1020 tuned silencer and a fuel Set the throttle-stop screw so • containing up to 30% nitromethane are used. that the minimum throttle Use the same fuel as is to be employed for all initial opening (idle setting) is • running and containing NOT LESS THAN 18% approximately 1.0mm. lubricant. DO NOT energize glowplug, • Throttle S
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30º 30º 30º Remember! Repeat this procedure until 5 more tanks of fuel have It is vitally important to set the been consumed, during which time the throttle may throttle at the correct position be opened for brief bursts of increased power. If the before attempting to start the engine stops at medium speeds, close the Mixture engine.If the engine is Screw 45-90˚. allowed to run with the The position of the needle-valve throttle too far open under when starting the engine. Needle "no l
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FINAL ADJUSTMENT IF THE ENGINE FAILS TO START Check the following: Run the vehicle (with throttle fully open) over the • longest available straight course, in order to observe Glowplug battery discharged or glowplug defunct. • the model's speed. Next return the car to the starting Fuel not reaching carburetor. • point, close the Needle-Valve 30˚ and repeat the Engine flooded. Do not over-prime. (This could also run, taking note of the improvement in performance. • Continue with further run
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In this case, turn the Mixture Control Valve With the optimum mixture control position, light • • clockwise 45~90˚. If, on the other hand, the engine smoke is visible during high speed running,and the tends to speed up momentarily and then cut out engine revolutions increase smoothly during abruptly when the throttle is opened,the idling acceleration. Remember that, if the engine is mixture is too lean. Correct this by turning the operated with the fuel/air mixture slightly too lean, it Mix
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In case of the 10C caburetor BALL LINK AND SLIDE VALVE EXTENSION (In case of the 10C caburetor) First rotate the Mixture Control It is seldom necessary to separate the slide-valve Valve until its slotted head is extension from the slide-valve itself. For cleaning, flush with the carburetor body. withdraw this complete sub-assembly from the Then screw the valve in exactly carburetor body after removing the slide-valve guide 2.5 turn. screw. Then wash with methanol or glow-fuel. This is
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4. Then, inject some after-run oil into the engine, and CARE AND MAINTENANCE rotate the engine with an electric starter for 4 to 5 1.The minute particles of foreign matter, that are seconds to distribute the oil to all the working present in any fuel may, by accumulating and parts. partially obstructing fuel flow, cause engine Note: performance to become erratic and unreliable. Do not inject after-run oil into the carburetor as O.S. 'Super-Filters' (large and small) are available, this m
