User manual OS ENGINES FS-26S

[. . . ] It is of vital importance, before attempting to operate your engine, to read the general 'SAFETY INSTRUCTIONS AND WARNINGS' section on pages 2-6 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. q 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 aircraft, radio control equipment, etc. , are accessible for checking at the same time. q CONTENTS SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O. S. ENGINE INTRODUCTION, BASIC ENGINE PARTS INSTALLATION INSTALLATION OF CHOKE ROD, NEEDLE VALVE EXTENSION, EXHAUST PIPE ADJUSTMENT(FS-26S) SILENCER, LINKAGE OF THROTTLE LEVER BEFORE STARTING FUEL AND PRESSURE LINES ADVICE ON SELECTION OF FUEL, GLOEPLUG & PROPELLER STARTING THE ENGINE 2~6 RUNNING -IN CARBURETOR 7 CARBURETOR AIR-BLEED ADJUSTMENT 8 TROUBLE SHOOTING WHEN THE ENGINE FAILS TO START 9 VALVE ADJUSTING 10 11~12 12 CARE AND MAINTENANCE THREE VIEW DRAWING ENGINE EXPLODED VIEW CARBURETOR EXPLODED VIEW & PARTS LIST GENUINE PARTS & ACCESSORIES MEMO 25~26 27~29 30 31 32~35 24 21 22~23 13~14 15~21 36 37 38 1 SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O. S. [. . . ] Turn the needle-valve in the direction of arrow from the closed position. FS-26S (3 to 3-1/2 turns) FS-40S (2-1/2 to 3 turns) Close the air intake by operating the choke control. Set-screw 6 Open the throttle fully Fully closed position Fully opened position Close Open Turn the propeller 3 to 4 turns counterclockwise smartly by finger in the direction of arrow. 10 turns when the engine is cold. Throttle 16 8 Hold model securely when starting Assistant should hold the model so that it cannot move forward when the engine starts. Glowplug battery. Place as far to the rear as possible. 10 Heat glowplug Starting battery Assistant Connect battery leads as shown (polarity is immaterial. ) Starter Be careful not to be hit by propeller! 9 Setting the throttle Fully closed position Fully opened position 11 Apply electric starter Set at this Position. 17 Check that the throttle is one-third open from the fully closed position. Bring the starter into contact with the spinner nut or spinner and depress the starter switch for one or two seconds. When the engine fires, withdraw the starter immediately. Attention: Never place your finger over the carburettor intake when applying the starter. Such an action will cause an excess quantity of fuel to be drawn into the cylinder and result in hydraulic lock that may damage the engine. 12 Engine starts 13 Needle-valve adjustment(1) Slowly advance throttle to its fully open position, then gradually close the needlevalve until the exhaust sound changes pitch. Close the needle-valve gradually until a high-pitched exhaust note begins to be superimposed on the lower-pitched sound. 14 Disconnect battery leads Disconnect the battery leads from the engine with care so that the plug clip does not touch the rotating pro-peller. If the engine stops when battery leads are disconnected, close the needle-valve a little (approx. 45°) further, and restart the engine. BEWARE of the rotating propeller. In the interests of safety, keep your face and other parts of the body away from the vicinity of the propeller. 18 15 Needle-valve adjustment(2) As the needle-valve is closed beyond the initial readjustment, the rpm of the engine will be increased and a continuous highpitched exhaust note, only, will be heard. 16 Needle-valve adjustment(Summary) Practical best(optimum) needle-valve setting Maximum rpm setting("Lean"). 20~30° ev d e olu cr tio n s ea start t se. to de Key to the needle-valve adjustment. (Turn 15-30° at a time. ) "Rich" needle-valve setting when starting the engine. Turn the needle-valve 15-30° in the direction of arrow, and wait momentarily for the change of r. p. m. After the rpm of the engine increases, turn the needle-valve another 10 -15° and wait for the next change of r. p. m. As the speed of the engine does not instantly change with needle-valve readjustment, small movements, with pauses between, are necessary to arrive at the optimum setting. E ngi n e s top s Ro t Disconnect battery leads from glowplug at about this point. The engine may stop if the battery leads are disconnected from the glowplug while the engine is running rich. NOTE: The above sketch is for reference purposes only. Actual needle positions may differ from those shown. 19 On starting from cold, with the needle-valve set at the rich starting position: a good deal of white smoke is emitted. As the needle-valve is closed and the r. p. m. increases Exhaust smoke will be less dense and grey in color. Further needle-valve closure: revolutions will increase and exhaust smoke will be reduced. Finally: maximum rpm is reached and will fall off (or engine will stop) if needle -valve is closed any further. [. . . ] On the other hand, a total loss of clearance may cause difficult starting due to valves not closing properly, resulting in loss of compression. Fig. 4 4. Re-tighten locknut while holding adjusting screw stationary. (Fig. 5. ) Hold at the screw head. Fig. 5 Tighten Locknut. 29 CARE AND MAINTENANCE To ensure that you obtain long life and peak performance from your engine, observe the following. Avoid running the engine under dusty conditions. [. . . ]