User manual OS ENGINES MAX-12CV

[. . . ] 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. q 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. q q CONTENTS SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O. S. ENGINE INTRODUCTION, BASIC ENGINE PARTS INSTALLATION AIR CLEANER TYPE102 NOTES CONCERNING THE RECOIL STARTER GLOWPLUG TOOLS, ACCESSORIES, etc. [. . . ] It is not necessary to discard the lower element as frequently, but be sure to change it when it becomes soiled. unit and its cord. Some fuels have a detrimental effect on these parts. 9 x The starter prevents the engine from being 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. Ignition timing is 'automatic' : under reduced load, allowing higher rpm, the plug becomes hotter and, appropriately, fires the fuel/air charge earlier; conversely, at reduced rpm, the plug become cooler and ignition is retarded. 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 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. ) Glowplug life Particularly in the case of very high performance engines, glowplugs must be regarded as expendable However, plug life can be extended and engine performance maintained by careful use, i. e. : GLOWPLUG Since the compatibility of glowplug and fuel may have a marked effect on performance and reliability, it may be worthwhile to choose the R/C type plug found most suitable after tests. Recommended O. S. Carefully fit plug finger-tight, before final tightening with the correct size plug wrench. · Install a plug suitable for the engine. · Use fuel containing a moderate percentage battery connected while adjusting the needle. of nitromethane unless more is essential for racing events. · Do not run the engine too lean and do not leave the 10 When to replace the glowplug Apart from when actually burned out, a plug may need to be replaced because it no longer delivers its best performance, such as when: · Filament surface has roughened and turned white. · Filament coil has become distorted. · Foreign matter has adhered to filament or plug body has corroded. · Engine tends to cut out when idling. · Starting qualities deteriorate. TOOLS, ACCESSORIES, etc. The following items are necessary for operating the engine. As a starting point, we recommend a fuel containing 1020% nitromethane, changing to a fuel containing more nitro only if necessary. When the nitro content of the fuel is increased or the brand of fuel is changed, it is advisable to initially run the engine with a richer needle-valve setting, so that the optimum setting for the new fuel may be rechecked as described in the RUNNING-IN paragraphs. Dust and dirt that may otherwise be drawn into the engine will rapidly shorten its life. · Never run your vehicle without fitting the air cleaner. ¡ The Throttle Stop Screw: For setting the minimum idling speed: Fuel Tank NOTE: Needle Valve Readjustment may be necessary, occasionally to allow for changes in fuel formula, gear ratio or Throttle clutch engagement Stop Screw point. Mixture Control Valve Assembly Screw Connect suitable length of Silicone tubing between fuel tank and silencer. Silicone tube Silencer 13 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. x In case of the 10E-R caburettor · Set the throttle-stop screw so that the minimum throttle opening (idle setting) is approximately 1. 0mm. approx 1mm · · Temporarily remove the glowplug to check that it · Re-check the needle-valve Close and throttle settings. Turn the needle-valve clockwise slowly and gently until it stops. This is the fully Open Needle Valve closed position. Do not use force to turn the needle-valve beyond this point. Open the Needle-Valve 2 turns from the fully closed position. Approx. [. . . ] It is also recommended that a good in-line filter be installed between the tank and carburetor. Do not forget to clean the filters regularly to remove dirt and lint that accumulate on the filter screens. Also, clean the carburetor itself occasionally. At the end of each operating session, drain out any fuel that may remain in the fuel tank. [. . . ]