It is suggested that any instructions supplied with the aircraft, radio control equipment, etc., are accessible for checking at the same time. CONTENTS RUNNING -IN SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE 22-23 CARBURETOR INTRODUCTION,BASIC ENGINE PARTS CARBURETOR AIR-BLEED ADJUSTMENT INSTALLATION...
As owner, you, alone, are responsible for the safe operation of your engine, so act with discretion and care at all times. If at some future date, your O.S. engine is acquired by another person, we would respectfully request that these instructions are also passed on to its new owner.
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NOTES This engine was designed for model If you remove the glowplug from the engine aircraft. Do not attempt to use it for any and check its condition by connecting the other purpose. battery leads to it, do not hold the plug with bare fingers.Use an appropriate tool or a Mount the engine in your model securely, folded piece of cloth.
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This manual handles the following two versions. BASIC ENGINE PARTS FS-30S, FS-40S Rocker Cover The FS Series engines are up-to-date overhead-valve four-stroke-cycle engines for Glow plug...
3mm steel screw Steel washer Rigid hardwood for FS-30S (e.g. maple) 3.5mm steel screw At least 12mm At least 12mm (1/2") for FS-30S for FS-40S (1/2") for FS-30S At least Hardwood mounting beams 15mm(19/32") for FS-40S At least 15mm(19/32") for FS-40S...
Battery leads Resistance coil (nichrome wire) 7 Fuel tank For installation in the model, a 150cc(5oz.) for FS-30S and FS-40S tank is suggested. These will allow 10 minute flight. Fuel bulb 8 Fuel bottle or pump Battery leads Fuel pumps For filling the fuel tank, a simple, polyethylene "squeeze"...
9 Electric starter and starter battery Note: When cutting silicone tubing··· An electric starter is recommended Silicone tubing for starting. 10 Fuel can filter Install a filter in the outlet line of your refuelling container to prevent entry off oreign matter into Do not use wire cutters the fuel tank.
Do not run the engine too lean and do not leave the GLOWPLUG battery connected while adjusting the needle. The FS-30S and FS-40S are supplied with an O.S. Type F glowplug, specially designed for O.S. four- When to replace the glowplug stroke engines.
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Turn the needle-valve in the direction of arrow from the closed position. Turn the propeller 3 FS-30S (2 to 2-1/2 turns) to 4 turns counter- FS-40S (2-1/2 to 3 turns) clockwise smartly...
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Check that the throttle is one-third open from the fully Needle-valve adjustment(1) closed position. Bring the starter into contact with the Slowly advance throttle to its spinner nut or spinner and depress the starter switch fully open position, then gradually close the needle- for one or two seconds.
Subsequent starting procedure On starting from cold, with the needle-valve Once the optimum needle-valve setting has been set at the rich starting position: established (see "Needle-valve adjustment- a good deal of white smoke is emitted. Summary") the procedure for starting is simplified as follows: As the needle-valve is closed and the r.p.m.
CARBURETOR These engines are equipped with a throttle type car- buretor which provides a wide range of engine speed control. With the throttle lever linked to a suitable servo in the model, movement of the throttle control on the transmitter will enable engine to be varied, proportionally, from idling speed to full power.
CARBURETOR AIR-BLEED ADJUSTMENT Start the engine. Pre-Flight Check Make sure that the throttle is fully open. Start engine and adjust needle- valve as previously described. ˚ 20-30 open from maximum Adjust the neede-valve. r.p.m. setting. Close the throttle gradually. Close the throttle gradually. Find the idling position.
TROUBLE SHOOTING WHEN THE ENGINE FAILS TO START Four key points For quick, reliable starting, the following four conditions are required. 1 Good compression. 2 Adequate "glow" at glowplug. 3 Correct mixture. 4 Sufficient electric starter rotating speed. If the engine fails to start, or does not keep running after being started, check symptoms against the following chart and take necessary corrective action.
Note: VALVE ADJUSTING Valve clearances of all O.S. four-stroke-cycle ALL O.S. four-stroke engines have their valve(tappet) engines must be checked and reset ONLY WHEN clearances correctly set before they leave the factory. THE ENGINE IS COLD. However, if, after many hours of running time have Procedure is as follows: been logged, a loss of power is detected, or if the engine has to be disassembled or repaired as a result...
Remove 0.04mm feeler, rotate prop through two Insert 0.04mm feeler gauge between valve stem and revolutions and recheck gap. rocker-arm and gently turn adjusting screw clockwise until it stops.(Fig.4.) If clearance is correct, loosen the locknut on the other rocker-arm and repeat steps 1 to 5 above. Turn with fingers until it stops.
O.S. GENUINE PARTS & ACCESSORIES Valve Adjusting Propeller Locknut Set O.S.Glow Plug Radial Mount Set Tool Kit TYPE F For FS-30S (71908300) For FS-40S (45810100) For FS-40S (71906000) (72200060) (71615009) Flexible Exhaust Pipes Super Filter (L) NEEDLE VALVE EXTENSION 1010A (72108300)