User manual OS ENGINE MAX-55HZ HYPER

[. . . ] 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 model, radio control equipment, etc. , are accessible for checking at the same time. CONTENTS SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O. S. [. . . ] Pliers WARNING When checking the plug element hold the plug with tools, such as pliers, etc. Do not hold near your face or the fuel remaining in the filament may burn you. 21 1. Opening and closing of the Needle-Valve Turn the needle clockwise to close the needlevalve, and turn the needle counter-clockwise to open the needle-valve as shown in the sketch. Idle Mixture Control Screw: High Speed needle-valve Close Open Medium Speed needle-valve: 2. High Speed needle-valve: exactly two turns open from the fully closed position. (Note: If a different muffler is used, this setting may require readjustment) Idle Mixture Control Screw: at basic position when the engine leaves the factory. Medium Speed needle-valve: exactly two turns open from the fully closed position. Preparation of the starter Install the starting shaft to the starter securely. Improper installation will allow the shaft to swing creating a dangerous situation. 4. Checking the rotating direction of the starter Make sure that the starter rotates to the direction shown in the sketch. If the direction is reverse, reverse the leads on battery. 22 5. Inserting the starter shaft Insert the starting shaft into the shaft cup securely. Hold the rotor head by hand so that rotor cannot rotate when the engine is Started. Also, steady the model with a foot on the landing gear skid. Starting Connect the battery to the glowplug and start the engine by applying the starter. When started, switch off the starter and withdraw the starting shaft after making sure the rotation of the starter shaft stops. Stopping the engine Fully pull down the throttle trim on the transmitter. 6. Priming Without energizing the glowplug, open the throttle a little from the idle position. Turn the engine over using the starter until the fuel is seen to reach the carburetor. Preparation of starting Make sure that the transmitter throttle stick is at the fully closed position and the throttle trim at center position, and make sure that idle-up switch on the transmitter is off. 23 In case the engine does not stop. Hold the rotor head, and pinch the fuel line to stop the fuel supply. If it still does not stop, pull off the fuel line from the carburetor. It is necessary to readjust the throttle linkage so that the carburetor rotor is fully closed when the throttle stick and throttle trim on the transmitter are fully pulled Down. NOTE: If the throttle response is poor or the engine stops due to a temporarily over-rich mixture immediately after the engine is started, pinch the fuel line for one or two seconds until the engine r. p. m. increase and the engine runs steadily. Reminder! [. . . ] Engine overheated Disconnecting plug battery too soon. Air bubbles in fuel Corrective action Fill the tank with fuel. Do not disconnect plug battery and wait until the r. p. m. Fit O rings to the tank screws to prevent bubbles. 35 Symptom Unstable idle Cause Unsuitable glowplug Unsuitable fuel Silencer is disconnected or is loose Symptom Not reaching expected peak r. p. m. [. . . ]