Os-engines 50SX User Manual

It is of vital importance, before attempting to operate your engine, to read the general 'SAFETY INSTRUCTIONS AND WARNINGS' section on pages

Inlet HolderPlug Screw (50SX/91FX)Fuel InletNeedle-ValveAssemblyNeedle ExtensionInlet HolderFuel InletNeedle-ValveAssembly45mmFuel InletNeedle-ValveAs

Hardwood mounting beamsO.S. radial motor mount(cast aluminum)How to fasten the mounting screws.Make sure that the mounting beams are parallel and that

The exhaust outlet of the silencer can be rotated to any desired position in the following manner:Loosen the locknut and assembly screw.Set the exhaus

Suggested fuel tank capacities are listed opposite.These will allow 12-13 minute flights.Locate the fuel tank so that the top of the tank is 5-10mm (1

The role of the glowplugWith a glowplug engine, ignition is initiated by the application of a 1.5-volt power source. When the battery is disconnected,

FUELPROPELLERSSuggested propeller sizes are listed on page 15. The suitability of the prop depends on the size and weight of the model and type of fly

MIXTURE CONTROLS50SX40FX46FX61FX91FXRING10✕6,10.5✕6,11✕6~710.5✕6,11✕6~8,12✕6~712✕6~8,13✕6~715✕8,16✕6~8,17✕614✕7 (3-blade)Sport13✕11~13,14✕10~1111✕8~10

BEFORE STARTINGTools, accessories, etc.The following items are necessary for operating the engine.1 FuelModel glowplug engine fuel of good quality, p

12V BatteryStarter6 Fuel tankFor installation in the model, a 300cc (10.6oz.) for 50SX and 40,46FX, a 350cc (12oz.) for 61FX, a 450cc (15.8oz.) for 9

6. Connect battery leads to glowplug.Bring electric starter into contact with spinner-nut or spinner and depress starter switch for one or two second

SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINEFEATURES OF FX SERIES ENGINES, BEFORE INSTALLING THE ENGINEBASIC ENGINE PARTS NEEDLE-VALVE LOC

RUNNING-IN ("Breaking-in")All internal-combustion engines benefit from extra care when they are run for the first few timesknown as running-

Slowly advance the throttle to its fully open position, then gradually close the needle-valve until the exhaust note begins to change. (4-cycle to 2-c

20°~45°Needle-valve adjustment diagramThis diagram is for reference purposes only. Actual needle positions may differ from those shown.To stop the e

IDLING ADJUSTMENT CHARTStart the engine.Make sure that the throttle isfully open.Adjust the neede-valve.Close the throttle gradually.Find the idling p

MIXTURE CONTROL VALVE ADJUSTMENTREALIGNMENT OF MIXTURE CONTROL VALVEWith the engine running, close the throttle and allow it to idle for about five se

SUBSEQUENT STARTING PROCEDURESUBSEQUENT READJUSTMENTOnce the optimum needle-valve setting has been es-tablished (see page 19, Needle-valve adjustment

CARBURETOR CLEANLINESSENGINE CARE AND MAINTENANCEAt the end of each operating session, drain out any fuel that may remain in the fuel tank.Next, energ

ytrewq=-07654321C.M3✕15C.M2.6✕18iuC.M3✕8S.M3✕398q-1i-1i-2i-3i-4i-5i-6i-7i-8i-9i-10o✽ Type of screwC…Cap Screw F…Flat Head Screw N…Round Head Screw

1234567890-=qq-1wertyuii-1i-2i-3i-4i-5i-6i-7i-8i-9i-10o25204010252031002530340025203200252060002521700025205000256810102528114023981700232100072320900

=-09875432166-26-1qtewr-7r-6r-5r-4r-3r-2r-1rC.M3X15N.+M3.5X6S.M3X3C.M3X8✽Type of screwC…Cap Screw F…Flat Head Screw N…Round Head Screw S…Set Scr

Remember that your engine is not a "toy", but a highly efficient internal-combustion machine whose power is capable of harming you, or other

ENGINEN PARTS LIST (40,46FX) Specifications are subject to alteration for improvement without notice.1234566-16-27890-=qwerr-1r-2r-3r-4r-5r-6r-7tCode

EXPLODED VIEW (61FX)✽ Type of screwC…Cap Screw F…Flat Head Screw N…Round Head Screw S…Set ScrewC.M3✕151et24356-16-267w890-=qN.M3.5✕6r-1r-5r-3r-4

ENGINEN PARTS LIST (61FX) Specifications are subject to alteration for improvement without notice.No.1234566-16-27890-=qwerr-1r-2r-3r-4r-5r-6r-7r-8r-9

EXPLODED VIEW (91FXRING)✽ Type of screwC…Cap Screw F…Flat Head Screw N…Round Head Screw S…Set ScrewC.M3✕15yy2347r658-18-28N.M3.5✕6q=-900-1et-10t

ENGINE PARTS LIST (91FX RING)No.123456788-18-2900-1-=qwertt-1t-2t-3t-4t-5t-6t-7t-8t-9t-10y295040002950310029503400290532004540600027917000295050002958

9876543211-11-22-1N.+M3.5X69876543212-11-21-1N.+M3.5X6CARBURETOR 40B (50SX,40,46FX)11-11-222-13456789Throttle Lever Assembly Thrott

123-13-23N.M3.5✕687645N.+M3✕6CARBURETOR 60F (91FXRING)1233-13-245678Throttle Lever AssemblyCarburettor RotorMixture Control Valve Assembly "O&

No.8(71608001)A5(71605100) For 50SX. 40.46FX 73101000731010101/4"-285/16"-2450SX. 40. 46FX61FX. 91FX254255002662541050SX. 40.46FX(873)61

(72101230)For 61FX¡91FX (72403050) (71531000) (72101120)(71521000) 555000025550000350SX. 40.46FX61FX.91FXM3M4 721053377210133840.46FX61FX.91FX 25425

MAX-50SXRINGDisplacement Bore Stroke Practical R.P.M. Power output Weight8.17 cc (0.499 cu.in.)22.0mm (0.866 in.)21.5mm (0.847 in.)2,000~20,000 r.p.m

WARNINGSModel engine fuel is poisonous. Do not allow it to come into contact with the eyes or mouth. Always store it in a clearly marked container and

MAX-40FXMAX-46FX17.544UNF1/4-2860.519.57088355136.3Displacement Bore Stroke Practical R.P.M. Power output Weight6.47 cc (0.395 cu.in.)20.5mm (0.807 i

MAX-61FX4361UNF5/16-2466.529.14379100.5ø4.24225ø4.252Displacement Bore Stroke Practical R.P.M. Power output Weight9.95 cc (0.607 cu.in.)24.0mm (0.945

MAX-91FXRINGDimensions(mm)Displacement Bore Stroke Practical R.P.M. Power output Weight14.95 cc (0.912 cu.in.)27.7mm (1.091 in.)24.8mm (0.976 in.)2,0

C Copyright 2001 by O.S.Engines Mfg. Co., Ltd. All rights reserved. Printed in Japan.110101TEL. (06) 6702-0225FAX. (06) 6704-27226-15 3-Chome Imagawa

NOTES•••••This engine was designed for model aircraft. Do not attempt to use it for any other purpose.Mount the engine in your model securely, followi

NOTES••Always check the tightness of the propeller nut and retighten it, if necessary, before restarting the engine, particularly in the case of four

NOTES•••••Adjust the throttle linkage so that the engine stops when the throttle stick and trim lever on the transmitter are fully retarded. Alternati

This range of engines is ideally suited to a variety of R/C aircraft, including trainer, sports, aerobatic and scale types.A separate precision-made n

The procedure for relocating the needle-valve vertically is as follows:As delivered from the factory, the MAX-61FX and MAX-91FXRING have their needle-