O.S. engine FSa-155-P Owner'S Instruction Manual Download

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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.

●

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 aircraft, radio control equipment, etc., are
accessible for checking at the same time.

●

2-6

10-13

27-28

34-35

36-37

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

MIXTURE CONTROLS

CONTENTS

CARE OF FUEL PUMP & REGULATOR

STARTING

RUNNING -IN ("Breaking-in")

IDLE MIXTURE ADJUSTMENT

CARE AND MAINTENANCE

ENGINE EXPLODED VIEW & PARTS LIST

CARBURETOR EXPLODED VIEWS
& PARTS LIST

GENUINE PARTS & ACCESSORIES

THREE VIEW DRAWING

MEMO

29-30

31-33

14-16

24-26

Summary of Contents for FSa-155-P

Page 1: ...at 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 MIXTURE CONTRO...

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: ...0 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 res...

Page 5: ...ot only for 120 size scale and sport models but also for aerobatic models which require stable power and linear throttle response The O S pump system is easy to handle because it supplies fuel direct to the carburetor without pressurizing the fuel tank Be sure to vent the fuel tank New lubricating system eliminates the need for breather tubing from the crankcase The F 6020 silencer and Type F plug...

Page 6: ...ion of a spinner assembly for centering the starter sleeve is desirable Use a heavy duty well balanced spinner either of metal or plastic Spinner Fuel The FS 155 P 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 Some...

Page 7: ...k 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 th...

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 5mm steel nuts 5mm steel screw Spring washer or lock washer 15mm min 15mm min Hardwood such as cherry or maple Spring washer 5mm steel Allen screw Make sure that these mounting beams ...

Page 9: ... Set is supplied with the engine If a longer extension is reguired cut a commercially available rod to the required length bend one 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 Knob Cable 17 INSTALLING SILENCER Apply silicone sealant Exhaust Header Pipe Exhaust Header Pipe Nuts Screw the exhaust header...

Page 10: ...r you will suffer a burn Reminder 1 2 3 O Ring O Ring If the silencer is enclosed within a cowl it must be supplied with cooling air If cooling is insufficient the joint O ringe will deteriorate or melt in a short period of time Note 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...

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: ...the fuel system Dirt inside the pump or regulator no matter how small may obstruct the flow of fuel and prevent these components from working properly ALWAYS use fuel filters Keep the fuel tank scrupulously clean and filter all fuel as it enters the tank e g via an O S Super Filter Code No 72403050 and use a good quality in line filter between the tank and pump Remember to inspect filter screens a...

Page 13: ...nder head NOTE Check that the current to the glowplug is switched off 2 25 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 3 Open the needle valve 2 5 3 turns from the fully closed position and set the throttle in the fully open position 4 Apply the starter a...

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: ...nsiderable 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 Clearance should be 0 04mm 0 1mm 0015 004 For checking and adjusting the valve clearances a VALVE ADJUSTING TOOL KIT is available as an optional accessory Also a 5 5mm wrench not supplied is required for this purpose Feeler gauge 0...

Page 17: ...ed 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 ...

Page 18: ...retor Complete Type 70R Piston Ring Piston Piston Pin Piston Pin Retainer 2pcs Connecting Rod Cylinder Liner Pump Unit PD 08 Cover Plate Cover Gasket Crankshaft Crankshaft Ball Bearing Rear Crankcase Camshaft Ball Bearing 1pc Camshaft O Ring Cam Cover Push Rod 2pcs Push Rod Cover 1pc Push Rod Cover O Ring 2pcs Cam Follower 2pcs Crankshaft Ball Bearing Front Thrust Washer Drive Hub W woodruff key W...

Page 19: ...pcs O Ring S 2pcs Carburetor Body W Regulator Carburetor Rubber Gasket 1pc Rotor Guide Screw Needle Valve Holder Assembly Ratchet Spring Needle Assembly O Ring 2pcs Set Screw Fuel Inlet No 1 Air Funnel Set Screw Carburetor Retaining Screw 2pcs Description Code No No Specifications are subject to alteration for improvement without notice 1 1 1 2 3 3 1 3 2 4 5 6 7 7 1 8 8 1 8 2 9 10 10 1 11 22081408...

Page 20: ...R SINGLE CYLINDER 5 16 M4 72200060 72109720 M14 IN COWL HEADER PIPE INVERTED 80D IN COWL EXHAUST HEADER PIPE M14 IN COWL HEADER PIPE SIDE 60D 72109730 72200170 72200171 72200190 72200180 Plug Cable Set Plug Cable Plug Terminal Earth Cable 5 39 95 g 3 35 oz SPECIFICATIONS Dimensions mm THREE VIEW DRAWING F 6020 Silencer Assembly Displacement Bore Stroke Practical R P M Power output Weight 127 5 UNF...

Page 21: ...right 2010 by O S Engines Mfg Co Ltd All rights reserved Printed in Japan 60092460 061103 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 ...

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O.S. engine FSa-155-P, Owner'S Instruction Manual

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