User manual OS ENGINES MAX-21XM

[. . . ] It is of vital importance, before attempting to operate your engine, to read the general 'SAFETY INSTRUCTIONS AND WARNINGS' section on pages 2-3 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. ENGINE FITTING THE GLOWPLUG, INSTALLATION OF THE CARBURETTOR BASIC ENGINE PARTS PIPING, INSTALLATION, LINKAGES FUEL AND GLOWPLUG FLEXIBLE DRIVE SHAFT, PROPELLER, BEFORE STARTING THE ENGINE ADJUSTING THE CARBURETTOR, REALIGNMENT OF MIXTURE CONTROL VALVE STARTING RUNNING-IN (''Breaking-in'') ADJUSTMENT, CARBURETTOR CLEANLINESS CARE AND MAINTENANCE TROUBLE SHOOTING WHEN THE ENGINE FAILS TO START EXPLODED VIEW PARTS LIST CARBURETTOR EXPLODED VIEW & PARTS LIST THREE VIEW DRAWING AND SPECIFICATION 2~3 4 5 6 7 8 9 10 11 12~13 14 15 16 17 18 19 1 SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O. S. [. . . ] This may cause an hydraulic lock and bend the connecting-rod. x Adjusting the needle-valve: adjust the needle-valve to its without forcing, until it stops. Then, reopen the needle-valve 2-1/2turns counterclockwise. Mark Close Turn needle-valve counterclockwise to open (for richer mixture) Turn needle-valve clockwise to close (for leaner mixture) optimum setting only while actually running your boat on the water. x To stop the engine, fully close the throttle to cut off air Open supply. x Open the throttle very slightly: This is to avoid unnecessarily high revolutions when the engine starts. 10 RUNNING-IN (''Breaking-in'') For long life and high-performance, every engine needs to be properly 'run-in' or 'broken-in'. There are several running-in methods, but the following is suitable for use with the MAX21XM. Turn the Needle-Valve clockwise slowly and gently until it stops. Do not use force to turn the Needle-Valve beyond this point. Now reopen the Needle two-and-one-half turns. (The set-screw on the Needle-Valve knob may be used as a reference mark. ) 2. Set the throttle at the starting position, (i. e. very slightly opened from idling position) and start the engine. The propeller blades are extremely sharp. Never touch, or allow any object to come into contact with, the rotating propeller and do not crouch over the engine when it is running. Do not touch any part of the power-head until it has cooled. Contact with the muffler (silencer) or cylinder, also, may result in a serious burn. It is vitally important to set the throttle at the correct starting position before starting the engine. If the engine is allowed to run under 'no-load' conditions, it will speed up to extremely high revolutions even at part-throttle settings which may result in serious damage. Be careful not to put excessive load on the steering servo when starting the engine with an electric starter. It is advisable to set the steering fully left before applying an electric starter. 3. It is necessary to warm up the engine by running it at around the idling setting for a while after starting, as with the engine of a full size boat. operation without warming up will shorten engine life or damage it. Leaving the Needle-Valve set at the starting setting of 2-1/2 turns open, run the boat several times with the throttle fully open until at least three full tanks of fuel have been consumed. (It should be noted that, at this stage, it may not be possible for the engine to idle reliably because of the over-rich setting of the Needle-Valve. ) 5. This completes the initial running-in stage. [. . . ] Re-check and readjust referring to "BEFORE STARTING" Continue to apply starter. If necessary disconnect battery from glowplug and leave for a few minutes, then re-energize plug. If engine still does not start, remove glowplug and pump out excess fuel. Recharge lead-acid cell or replace dry battery. [. . . ]