User manual OS ENGINES MAX-15LD

[. . . ] 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 ENGINE SHIELD, INSTALLATION THROTTLE LINKAGE AIR CLEANER NOTES CONCERNING THE RECOIL STARTER GLOWPLUGS TOOLS, ACCESSORIES, etc. [. . . ] battery connected while adjusting the needle. · 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. · 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. When engines are run at very high speeds and on high-nitro fuels, glowplug elements do not last so long. Reminder! Model engine fuel is poisonous. Always store it in a clearly marked container and out of the reach of children. 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 fuelis increased. GLOWPLUG BATTERY The power source for heating the glowplug may be either a large heavy-duty 1. 5Volt dry cell, or a 2-Volt rechargeable lead-acid cell with extended leads (or a resistance) to reduce the applied voltage to 11 BATTERY LEADS These are used to conduct current from the battery to the glowplug. glows bright red when energized. · Temporarily remove the glowplug to check that it · Re-check the needle-valve Needle Valve and throttle settings. This is the fully Open Close 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. 0. 3-0. 5mm · Never run your vehicle without fitting the air cleaner. · · Switch on the transmitter and Silencer receiver and set the throttle very slightly opened from the idling position. 13 · DO NOT energize glowplug, but apply electric starter to draw fuel to carburetor. Rear Front · When the engine starts, first allow it to operate in short runs at the very rich starting settings, with the glowplug battery still connected and with its driving wheels clear of the ground. The rich mixture will, under these conditions, provide adequate lubrication and cooling, indicated by profuse smoke from the exhaust. · Now connect glowplug battery lead to heat the plug filament and start the engine. Push the choke button on the fuel tank several times to deliver the fuel to the carburetor. (Do not overprime or the recoil starter cannot be pulled. ) Rotating Direction s In case of the 12/15LD-X · Next, · disconnect the glowplug battery and try running the car on the track. If the engine stalls, open the throttle fractionally, but try to keep the engine running as rich as possible: if it stops because of being excessively over-rich, close the Needle-Valve 30° and try again. Starter Handle · Run the car on the track until one tank of fuel has been consumed, then close the Needle-Valve 30° and run the car for another full tank of fuel. Repeat this procedure until 5 more tanks of fuel have been consumed, during which time the throttle may be opened for brief bursts of increased power. If the engine stops at medium speeds, close the Mixture Screw 45-90°. Pull the starter handle briskly straight out several times to start the engine. It is vitally important to set the throttle at the correct position before attempting to start the engine. If the engine is allowed to run with the throttle too far open under "no load" conditions, it will rapidly overheat and may be seriously damaged. · 14 Repeat this procedure until 5 more tanks of fuel have been consumed, during which time the throttle may be opened for brief bursts of increased power. If the engine stops at medium speeds, close the Mixture Screw 45-90°. Needle IF THE ENGINE FAILS TO START Check the following: 30º The position of the needle-valve when starting the engine. · Glowplug battery discharged or glowplug defunct. (This could also cause hydraulic lock and damage the engine on application of the electric starter. ) Remove glowplug, close needlevalve and apply starter to pump out surplus fuel. [. . . ] These procedures will reduce the risks of starting difficulties or corrosion after a period of storage. Finally, when cleaning the exterior of the engine, use methanol or kerosene. Do not use gasoline or any solvent that might damage the silicone fuel tubing. Caution: The rear crankshaft bearing of this engine uses a special plastic retainer. [. . . ]