O.S. engine FSA-72, Owner'S Instruction Manual

Page 1: ...s suggested that any instructions supplied with the aircraft radio control equipment etc are accessible for checking at the same time 1 2 6 7 8 9 10 13 20 21 27 28 34 35 36 37 38 17 18 SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O S ENGINE NOTES WHEN APPLYING AN ELECTTRIC STARTER ABOUT THE ENGINE ENGINE PARTS NAME BEFORE STARTING INSTALLATION INSTALLING SILENCER FUEL TANK LINES PROPELLER GLOWPLUG ...

Page 2: ...sonous Do not allow it to come into contact with the eyes or mouth Always store it in a clearly marked container and out of the reach of children Never operate your engine in an en closed space Model engines like auto mobile engines exhaust deadly carbon monoxide Run your engine only in an open area Model engines generate considerable heat Do not touch any part of your engine until it has cooled C...

Page 3: ...s check the tightness of the propeller nut and retighten it if necessary before restarting the engine Also check the tightness of all the screws and nuts before restarting the engine If you install a spinner make sure that it is a precision made product and that the slots for the propeller blades do not cut into the blade roots and weaken them Preferably use an electric starter The wearing of safe...

Page 4: ...t 20 feet or 6 meters when preparing your model for flight If you have to carry the model to the take off point with the engine running be especially cautious Keep the propeller pointed away from you and walk well clear of spectators Warning Immediately after a glowplug ignition engine has been run and is still warm conditions sometimes exist whereby it is just possible for the engine to abruptly ...

Page 5: ...ed F 5030 silencer minimizes noise with its soft low amplitude sound Threaded header pipe allows adjustments in the distance between silencer and exhaust and exhaust angle New lubricating system eliminates the need for breather tubing from the crankcase It has the same mounting dimensions drive hub position and linkage position with the FL 70 Glowplug TypeF 9 ENGINE PARTS NAME Rocker Cover Drive H...

Page 6: ...is desirable Use a heavy duty well balanced spinner either of metal or plastic Spinner FUEL The FS 72 should be operated on a methanol based fuel containing not less than 18 volumetric castor oil or a top quality synthetic lubricant or a mixture of both plus a small percentage 5 20 of nitromethane for improved flexibility and power The carburetor is adjusted a little on the rich side at the factor...

Page 7: ...tank O S Super Filters large and small are available as optional extras O S Super Filter Fuel Can Filter S To prevent the pickup from adhering to the tank wall under suction and restricting fuel flow slots may be filed in the end of the weight Alternatively an O S Non Bubble Weight is available as an optional extra O S Non Bubble Weight 13 It is recommended to install a good in line filter between...

Page 8: ...their top surfaces are in the same plane 15 How to fasten the mounting screws Hardwood mounting beams Radial motor mount cast aluminum Tighten second nut firmlydown onto first nut Tighten this nut first Steel washer 3mm steel nuts 3mm steel screw Spring washer or lock washer 15mm min 15mm min Hardwood such as cherry or maple Spring washer 3 5mm steel Allen screw Make sure that these mounting beams...

Page 9: ...end to an L shape insert it into needle s center hole and secure it by tightening the set screw in the needle valve knob with 1 5mm Allen key Needle Valve Extension Cable Set Code No 72200080 is available from O S as an optional part Needle Valve Extension Cable Set 1 5mm Allen key Set Screw 17 INSTALLING SILENCER Apply silicone sealant Exhaust Header Pipe Exhaust Header Pipe Nuts Screw the exhaus...

Page 10: ...g O Ring 19 FUEL TANK LINES Make sure that the tank is well rinsed out with methanol or glow fuel before installation and that the pickup weight is well clear of the bottom of the tank when held vertically Plug commercially available For carburetor Approx 10mm Approx 1 3 Carburetor Center Line Locate the fuel tank as close to the engine as possible to minimize fuel level pressure variation For Sil...

Page 11: ...en it is necessary to replace Carefully install plug finger tight before final tightening with the correct size plug wrench GLOWPLUG The role of the glowplug Glowplug life Particularly in the case of very high performance engines glowplugs must be regarded as expendable items However plug life can be extended and engine performance maintained by careful use i e Install a plug suitable for the engi...

Page 12: ... succeeding sections under Starting Running in and Idle Adjustment The Needle Valve When set to produce maximum power at full throttle this establishes the basic fuel air mixture strength The correct mixture is then maintained by the carburetor s built in automatic mixture control system to cover the engine s requirements at reduced throttle settings The Mixture Control Valve This meters fuel flow...

Page 13: ...remaining in the filament may burn you 25 Check that the current to the glowplug is switched off 3 To close the needle valve turn it clockwise while to open the needle valve turn it counter clockwise Turn the needle valve clockwise slowly until it stops This is the fully closed position 4 Open the needle valve 2 5 3 turns from the fully closed position and set the throttle in the fully open positi...

Page 14: ...nd for flying your model 1 2 Open the needle valve 2 5 3 turns from the fully closed position and start the engine 3 Open the throttle slowly to the mid speed position and disconnect the current to the glowplug 4 Now open the throttle slowly to the fully opened position and run the engine for no more than 5 seconds with the needle valve tuned to produced near maximum r p m then immediately slow th...

Page 15: ...to be readjusted to a richer setting 7 29 IDLE MIXTURE ADJUSTMENT Start the engine open the throttle fully and set the needle valve slightly rich 30 45 from the highest r p m setting Close the throttle to the idle position Allow the engine to idle for about 5 seconds then reopen the throttle The engine should accelerate smoothly back to full speed If instead the engine responds sluggishly and emit...

Page 16: ...seldom require adjustment However if after a considerable amount of running time a loss of power is detected or if he engine has been disassembled for repair these clearances should be checked and reset as necessary For checking and adjusting the valve clearances a VALVE ADJUSTING TOOL KIT is available as an optional accessory Feeler gauge 0 04mm The kit comes in a plastic case and includes Code N...

Page 17: ...fuel in the engine at the conclusion of a day s flying Accepted practice is to cut off the fuel supply while the engine is still running at full throttle then expel as much fuel residue as possible by turning the engine over 5 10 seconds with the electric starter Finally inject some after run oil through the glowplug hole and turn the engine over several times by hand 33 When the engine is not to ...

Page 18: ...W Gasket Cylinder Head Gasket 1pc Intake Manifold 1pc Carburetor Complete Type 61N Piston Ring Piston Piston Pin Connecting Rod Cylinder Liner Cover Plate Crankshaft Crankshaft Ball Bearing Rear Crankcase Camshaft Ball Bearing 1pc Camshaft Cam Cover Push Rod 2pcs Push Rod Cover 1pc Push Rod Cover O Ring 2pcs Cam Follower 2pcs Crankshaft Ball Bearing Front Drive Hub W woodruff key Woodruff Key Lock...

Page 19: ...t No 1 Carburetor Rubber Gasket 1pc Rotor Guide Screw Mixture Control Valve Assembly O Ring L 2pcs O Ring S 2pcs Carburetor Rotor Throttle Lever Assembly Throttle Lever Retaining Screw Air Funnel Set Screw Carburetor Retaining Screw 2pcs Description Code No No Specifications are subject to alteration for improvement without notice 1 1 1 1 2 2 2 1 3 4 5 6 7 7 1 7 2 8 9 9 1 10 10 1 11 44881970 24981...

Page 20: ...OL KIT NON BUBBLE WEIGHT NON BUBBLE WEIGHT S 72200060 72109680 M11 IN COWL HEADER PIPE INVERTED 80D IN COWL EXHAUST HEADER PIPE M11 IN COWL HEADER PIPE SIDE 60D 72109690 72200080 Needle Valve Extension Cable Set 39 Displacement Bore Stroke Practical R P M Power output Weight SPECIFICATIONS Dimensions mm THREE VIEW DRAWING F 5030 Silencer Assembly 54 g 1 9 oz 11 79 cc 0 720 cu in 27 0 mm 1 063 in 2...

Page 21: ...right 2008 by O S Engines Mfg Co Ltd All rights reserved Printed in Japan 60092140 110901 6 15 3 Chome Imagawa Higashisumiyoshi ku Osaka 546 0003 Japan TEL 06 6702 0225 FAX 06 6704 2722 URL http www os engines co jp ...