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.
WARNINGS SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE Never touch, or allow any object to come into contact with, the rotating propeller and do not crouch over the engine when it is running. Remember that your engine is not a " toy ", but a highly efficient internal-combustion machine whose power is capable of harming you, or others, if it is misused or abused. As owner, you, alone, are responsible for the safe operation of your engine, so act with discretion and care at all times.
NOTES 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.
ABOUT THE ENGINE This is an overhead valve four stroke cycle engine for model aircraft use. This engine has a largest displacement of 32.4cc in the FS series and is suitable for big scale and sport models. STANDARD ACCESSORIES Glowplug TypeF Needle Valve Extension Cable Set The new O.S.
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. For plumbing, use heavy duty silicone tubing of 2.5mm inner dia and 5mm outer dia. The suggested fuel tank size is 500cc or 14 oz. This will give approximately 12-13 minutes running time when some part-throttle operation is included.
How to fasten the mounting screws. 5mm steel nuts Spring washer or lock washer Tighten second nut firmly down onto first nut. Tighten this nut first. 5mm steel Allen screw Spring washer 15mm min. Hardwood such as cherry or maple. Steel washer 15mm min. 5mm steel screw Hardwood mounting beams radial motor mount (cast aluminum) Make sure that these mounting beams are accurately aligned and firmly integrated with the airframe, reinforcing the adjacent structure to absorb vibration.
EXHAUST HEADER PIPE & SILENCER IInstall these in the following sequence. Screw the exhaust header pipe into the exhaust port until it “bottoms”, then unscrew it approximately 90 degrees,and secure with locknut. Screw the silencer onto the header pipe more than 10mm and maximum 30mm to achieve the desired exhaust angle and tighten the other locknut.
2. Install the prop to the engine shaft, followed by the retaining washer and prop nut and tighten firmly with a 14mm wrench. (not supplied). NOTE: Make a habit of always checking the tightness of the propeller before starting the engine. Remember that, especially with wooden propellers, there is a tendency for the material to shrink, or for it to be reduced by the serrated face of the drive hub. Retighten the propeller nut if necessary after loosening the Safety Propeller Locknut.
GLOWPLUG Since the compatibility of the glowplug and fuel may have a marked effect on performance and reliability, it is suggested to use the O.S. Type F plug when it is necessary to replace. Carefully install plug finger-tight, before final tightening with the correct size plug wrench. 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.
CARE OF FUEL PUMP & REGULATOR DO NOT obstruct the small rectangular hole at the bottom of the regulator, nor the regulator will not function correctly. When new, 2~3 minutes of running time will be required for the pump and regulator to begin functioning properly, During this period you may not be able to get the full throttle mixture rich enough. In this case, just run the engine at approx, 3/4 throttle a little longer. NEVER disassemble the fuel pump or pressure regulator.
RUNNING-IN ("Breaking-in") For long life and peak performance, every engine needs special treatment when new, know as “running-in” or “breaking-in”. This is a procedure during which the engine is operated under strictly controlled conditions at the beginning of its life, in order to avoid the risk of immediate damage to certain components through becoming overheated or stressed and to help working surfaces to become smoothed and aligned for maximum mechanical efficiency thereafter.
IDLE MIXTURE ADJUSTMENT REALIGNMENT OF MIXTURE CONTROL VALVE 1. Start the engine, open the throttle fully and set the needlevalve slightly rich (45-60°) from the highest r.p.m. setting. In the course of making carburetor adjustments, it is just possible that the Mixture Control Valve setting may be upset. 2. 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.
MAINTENANCE Please pay attention to the matters described below to ensure that your engine serves you well in regard to performance, reliability and long life. The use of modern high-performance alcohol based model engine fuels, while promoting cooler running, improved antidetonation combustion and increased power, have the disadvantage of causing corrosion due to the acid byproducts of combustion. The use of nitromethane in the fuel can also contribute to the problem.
27 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 32-1 33 34 35 36 37 38 39 40 40-1 40-2 40-3 40-4 40-5 Description Rocker Cover Rocker Cover Gasket Rocker Arm Retainer (2pcs.) Rocker Support Rocker Arm (1pc.) Tappet Adjusting Screw (1pair) Split Cotter (2ps./1pair) Valve Spring Retainer (1pc.) Intake Valve Spring (1pc.) Exhaust Valve Spring (1pc.) Intake Valve (1pc.) Exhaust Valve (1pc.) Cylinder Head (W/Gasket) Head Gasket (2pcs.) Intake Manifold Gasket (2pcs.
EXPLODED VIEW & PARTS LIST S.3x3 1-3 8 1-2 1-5 1-1 4 3 1-4 2 1 5-2 N.+M3x22 9 5-1 2 5 N.+M3x6 6 7-1 No. Code No. Description 1 1-1 1-2 1-3 1-4 1-5 2 3 4 5 5-1 5-2 6 7 7-1 8 9 23881900 22681980 24981837 26381501 27381940 26711305 22681953 44582100 45581820 44581600 46066319 24881824 44582200 27881400 22081313 44581500 45581700 Needle-valve Assembly Needle Assembly "O" Ring (2pcs.) Set Screw Needle-valve Holder Assembly Ratchet Spring Fuel Inlet (Nipple No.
THREE VIEW DRAWING Specifications 4- 5.1 116g (4.1 oz.) 58 (Silencer including exhaust header pipe) 32.4 cc / 1.98 cu.in. 38.0 mm / 1.50 in. 28.6 mm / 1.13 in. 1,800 - 10,000 r.p.m. 3.0 ps / 9,000 r.p.m. 876 g / 30.9 oz. 50~70 Displacement Bore Stroke PracticalR.P.M. Output Weight 64 25 82 144 119 97~117 25 UNF5/16-24 48 67 30.5 37 77 65 Dimensions (mm) 30 URL : http://www.os-engines.co.jp C Copyright 2008 by O.S.Engines Mfg. Co., Ltd. All rights reserved. Printed in Japan.
