User manual OS ENGINES MAX-12CV-R

[. . . ] 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 WARNINGS ABOUT YOUR O. S. ENGINE INTRODUCTION, BASIC ENGINE PARTS INSTALLATION AIR CLEANER NOTES CONCERNING THE RECOIL STARTER GLOWPLUG TOOLS, ACCESSORIES, etc. [. . . ] As this oil is very sticky, take care, when handling it, to prevent dust or dirt from adhering to the element. If your fingers become contaminated, wash them with soap and water. · During storage, the oil may have become unevenly dispersed through the element. This will be indicated if the blue colour of the element material appears patchy. In this case, place the element in a small plastic bag and gently rub it Insert beneath flange between finger and thumb to redistribute the oil. REPLACEMENT OF ELEMENT · It is advisable to replace the filter element with a new one after not more than one hour of running time. Always remove contaminated elements carefully, to ensure that dirt cannot enter the carburettor. 10 x The starter prevents the engine from being rotated in the wrong direction. The unit will be damaged if you attempt to force the flywheel in the opposite direction (i. e. clockwise when viewed from the crankshaft end). NOTE: Because, in the interests of personal safety, dismantling of the starter mechanism is strongly discouraged, the Recoil Starter is available for replacement only as a preassembled unit. However, some related parts, such as Starting Shaft and Rear Adaptor, are obtainable separately. (See Parts List. ) The role of the glowplug With a glowplug engine, ignition is initiated by the application of a 1. 5-volt power source. When the battery is disconnected, the heat retained within the combustion chamber remains sufficient to keep the plug filament glowing, thereby continuing to keep the engine running. Model engine fuel is also highly flammable. Keep it away from open flame, excessive heat, sources of sparks, or anything else which might ignite it. FUEL Use only top quality methanol-based model engine fuel. For consistent performance and long engine life, it is advisable to use fuel containing AT LEAST 18% lubricant. This engine is designed to run on both low and high nitromethane content fuels, i. e. from mild mixtures containing a few percent of nitromethane, up to highspeed racing fuels containing 40%, nitromethane. Generally, power output is increased-up to a certain point-as the nitromethane content of the fuel is increased. ELECTRIC STARTER AND STARTER BATTERY Use a 12-volt electric starter with suitable battery for starting the engine. (12CV-R/R(P)) 12 BATTERY INTEGRATED GLOWPLUG HEATER Commercialy available handy glowplug heater in which the glowplug battery and battery leads are integrated. CARBURETTOR CONTROLS (10C) Three adjustable controls are provided on this carburettor. · The Needle-Valve: For adjusting the mixture strength when the throttle is fully open. FUEL PUMP For filling the fuel tank, a simple, polyethylene "squeeze" bottle, with a suitable spout, is required. · The Mixture Control Screw: For adjusting the mixture strength at partthrottle and idling speeds, to obtain steady idling and smooth acceleration to mid speeds. LONG SOCKET WRENCH Recommended for easy removal and replacement of the angled and recessed glowplug, the O. S. Long Socket Wrench incorporates a special grip. · The Throttle Stop Screw: For setting the minimum idling speed. Ball Link SILICONE FUEL LINE Heatproof silicone tubing of approx. is required for the connection between the fuel tank and engine. 13 NOTE: Readjustment may be necessary, occasionally to allow for changes in fuel formula, gear ratio or clutch engagement point. Needle Valve Throttle Stop Screw Mixture Control Valve Assembly Screw CARBURETTOR CONTROLS (10E-R) Three adjustable controls are provided on this carburettor. · PRESSURIZED FUEL SYSTEM · The somewhat violent changes of vehicle attitude The Needle-Valve: For adjusting the mixture strength when the throttle is fully open. · The Mixture Control Screw: For adjusting the mixture strength at partthrottle and idling speeds, to obtain steady idling and smooth acceleration to mid speeds. that occur in off-road running, combined with the fact that, in buggy type cars, the fuel tank is often located some distance from the carburettor, means that fuel 'head' at the carburettor can vary and upset running. Therefore, it is recommended that a muffler pressurized fuel feed system be used. run your vehicle without installing the air cleaner. Dust and dirt that may otherwise be drawn into the engine will rapidly shorten its life. · Never · The Throttle Stop Screw: For setting the minimum idling speed: Fuel Tank Connect suitable length of Silicone tubing between fuel tank and silencer. Silicone tubing NOTE: Readjustment may be necessary, occasionally to allow for changes in fuel, gear ratio or clutch enThrottle gagement point. Needle Valve Stop Screw Silencer Mixture Control Valve Assembly Screw 14 STARTING THE ENGINE & RUNNING-IN ('Breaking-in') The following procedure is suitable for these engines when the O. S. T-1020 tuned silencer and a fuel containing up to 30% nitromethane are used. Use the same fuel as is to be employed for all initial running and containing NOT LESS THAN 18% lubricant. [. . . ] Also, clean the carburetor itself occasionally. At the end of each operating session, drain out any fuel that may remain in the fuel tank. Afterwards, energize the glow-plug and try to restart the engine, to burn off any fuel that may remain inside the engine. Repeat this procedure until the engine fails to fire. [. . . ]