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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 2-4 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 i
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SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR WARNINGS O.S. ENGINE Never touch, or allow any object to come into Remember that your engine is not a " toy ", but a highly contact with, the rotating propeller and do not efficient internal-combustion machine whose power is crouch over the engine when it is running. capable of harming you, or others, if it is misused or A weakened or loose propeller may disintegrate or be thrown abused. As owner, you, alone, are responsible for the safe off a
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Use an electric starter for this engine. The wearing of safety glasses is also strongly recommended. Take care that the glow plug clip or battery leads do not come into contact with the propeller. Also check the linkage to the throttle arm. A disconnected linkage could also foul the propeller. After starting the engine, carry out any needle-valve readjustments from a safe position behind the rotating propeller. Stop the engine before attempting to make other adjustments to the carburetor. Adj
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Photo. 2 ENGINE PARTS NAME Right (No.2) Cylinder Crankcase Aluminum tube Left (No.1) Cylinder Cylinder Head Glow Plug Rocker Cover Propeller Nut Lock Nut Propeller Washer Drive Hub Exhaust Pipe Carburetor Aluminum tube is not supplied with the engine. 6 Photo. 3 Choke Valve Intake Manifold Fuel Inlet Push Rod Cover Breather Nipple Intake Pipe (Right) Intake Pipe (Left) Rear Housing 7
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INSTALLATION It is essential that the firewall is strong and rigid (e.g. at Needle-valve extension least 15mm thick) and firmly integrated with the structure of The needle-valve with this engine is designed to incorporate the aircraft. an extension so that, when the engine is enclosed within the fuselage, the needle-valve may be adjusted from the In the interests of scale appearance, the engine should be outside. An L-shaped rod, of 1.6-1.8mm dia. and installed with the carburetor below th
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Carburetor PROPELLER The needle-valve and throttle lever locations are interchangeable by reversing the carburetor. This can be The choice of propeller depends on the design and weight of done as follows: the aircraft and on the type of flying in which you will be Remove the carburetor carefully by unscrewing the two engaged. Determine the best size and type after practical screws which secure both carburetor and choke valve. experimentation. As a starting point, refer to the props listed in
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GLOWPLUGS The FT-160 is supplied with an O.S. Type F glowplug, When to replace the glowplug specially designed for O.S. four-stroke engines. Apart from when actually burned out, a plug may need to be replaced because it no longer delivers its best performance, The role of the glowplug such as when: With a glowplug engine, ignition is initiated by the application Filament surface has roughened and turned white. of a 1.5-volt power source. When the battery is disconnected, Filament coil ha
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Glowplug leads If glowplug leads are extended together as a single cable, 2 The plug leads are fitted with special snap-on connectors use heavier wire, e.g. 2.0 mm multi-strand copper core as that ensure firm contact with O.S. plug. They are a "click" fit supplied for earth lead. and are not suitable for use with most other makes of 2 glowplug. 2.0mm The earth (ground) lead is fitted with a plug terminal which should be connected to the engine by means of one of the mounting screws. Fast
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2. Make sure that glowplugs are not connected to the battery. If very strong compression is felt when trying to turn the Do not heat the glowplugs while priming. (Fig.15). propeller counter-clockwise, too much fuel has been drawn into the engine. In this case, do not use force, but release the choke valve and turn the propeller clockwise slowly to Do not connect the battery to eject excess fuel through exhaust pipes. the glowplugs while priming. Fig.18 Fig.15 Do not apply the starter with th
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10. Adjust the needle-valve RUNNING-IN ("Breaking-in") Abrupt adjustment of the needle-valve may cause the Obtain a 18x6 propeller for running-in. engine to stop, especially when it is new and insufficiently run-in. 1. Running-in on the ground As the speed of the engine does not instantly change with needle-valve readjustment, small movements, with pauses Start the engine between, are necessary to arrive at the optimum setting. 1 Practical best (optimum) needle-valve setting Set the needle
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20 Start the engine. Disconnect the glowplugs from the battery. open the throttle fully . Approx 40˚ open from maximum r.p.m. setting. Adjust the neede-valve. Make sure that all 2 cylinders are firing. Close the throttle gradually. The position where the lowest Find the idling position. possible r.p.m. ,with steady running, is obtained. Fix the idling position. Set the throttle opening by means of the throttle trim on the transmitter so that the lowest Re-set the idling position at practical
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Adjusting the mixture control valve of the + mark about 1/12 turn (30 ). Normal safe idling speeds are in the region of 2,000 r.p.m.. 1. If the engine hesitates, puffing out Mixture Control Screw a good deal of smoke, before NOTE: picking up to full speed, it is As this is two-cylinder four-stroke-cycle engine, firing Turn 30 probable that the idling mixture is strokes occur every half revolution (360 ), that is, two too rich. firings take place every one complete revolution. In this c
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VALVE CLEARANCE ADJUSTMENT ALL O.S. four-stroke engines have their valve (tappet) 2.Remove all the glowplugs except the one fitted to the clearances correctly set before they leave the factory. cylinder that you want to check. However, if, after many hours of running time have been logged, a loss of power is detected, or if the engine has to Note: be disassembled or repaired as a result of an accident, Each glowplug should be re-fitted to the original cylinder. valve clearances should be
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4. Re-tighten locknut while holding adjusting screw stationary. (Fig.33.) Hold at the screw head. Tighten Locknut. Fig.33 5.Remove 0.04mm feeler, rotate prop through two revolutions and recheck gap. 6. If clearance is correct, loosen the locknut on the other rocker-arm and repeat steps 1 to 5 above. Finally, replace rocker box cover. Remember: Excessive valve clearance will cause loss of power, due to valve (s) not opening sufficiently. On the other hand, a total loss of clearance may caus
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EXPLODED VIEW 36 C.M3x16 C.M4x22 29 28 C.M3.5x12 39 1 29-1 31 30 37 M3 35 8 38 34 27 6 26 C.M3.5x10 33 7 6-2 25 6-3 12-2 1 6-4 3-1 3-2 32 3 12 5-2 C.M3.5x15 5 13 12-1 14 24 5-1 2 13-1 13-2 23 C.M3x15 19 9-2 6-1 17 9-1 22 4-2 4-1 C.M3.5x20 9-3 21 16-2 16-1 9-2 16-3 10 4 C.M2.6x7 15 1 16 20 9 11 C.M3x8 18 Type of screw N.+M3x22 C...Cap Screw M...Oval Fillister-Head Screw F...Flat Head Screw N...Round Head Screw S...Set Screw 26 PARTS LIST No. Code No. Description No. Code No. Description 1 Scr
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CARBURETOR EXPLODED VIEWS & PARTS LIST S.M3x3 Description No. Code No. Set-screw 1 26381501 1 Throttle Lever Assembly 2 24981405 2 Set-screw 2-1 26381501 5 6 2-1 Mixture Control Screw Assembly 3 46481320 3-1 22781800 "O" Ring (2pcs.) 3-1 S.M3x3 4-1 8 46481330 Mixture Control Screw Holder Assembly 3 4 4 7-1 4-1 26381501 Set-screw S.M3x3 5 46481200 Carburetor Rotor 7 6 46281340 Mixture Control Valve Pin 7 46481310 Mixture Control Valve Assembly 10-2 7-1 22781800 "O" Ring (2pcs.) 10-1
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THREE VIEW DRAWING Specifications Displacement 13.26cc x 2 / 1.218cu.in. x 2 Bore 27.7mm / 1.091in. Stroke 22.0mm / 0.866in. PracticalR.P.M. 2.000-10.000r.p.m. Output Weight 1,100g / 38.8oz. 4 -5.2 120 68 76 196 Dimensions(mm) 30 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 60090531 040501 C Copyright 2004 by O.S.Engines Mfg. Co., Ltd. All rights reserved. Printed in Japan. 50.5 56.
