It is of vital importance, before attempting to operate your engine, to read the general 'SAFETY INSTRUCTIONS AND WARNINGS' section on
18The exhaust outlet of the silencer can be rotated to any desired position in the following manner:Loosen the locknut and assembly screw.Set the exha
20PROPELLERThere is a risk, particularly with powerful four-stroke engines, of the propeller flying off if the prop nut loosens due to detonation
22TYPE 61R CARBURETTORThe sequence in which these controls are adjusted is explained in the succeeding sections, under Starting, Running
24STARTINGThe FS -81-P is not equipped with manual choke controls, as it is intended for use with an electric starter only.A high-torque
26Check these conditions and, instead of pressing the starter button after applying the starter, have the starter spinning before applying
28WARNING:When ground running the engine, avoid dusty or sandy locations. If dust or grit is drawn into the engine, this can have
30CARBURETOR CARE & MAINTENANCEIf you experience difficulty in obtaining a consistent mixture setting it could be due to foreign deb
32Install an in-line fuel filter between the tank and carburetor to prevent dirt and foreign in the tank from entering the carburetor.If the
34ENGINE EXPLODED VIEW & PARTS LISTCAP SCREW SETS(10pcs./sets)Code No.SizeRocker Support Retaining Screw (1pc.) Pcs. used in an engineCylinder Hea
36CARBURETOR EXPLODED VIEWType of screw C...Cap Screw M...Oval Fillister-Head ScrewF...Flat Head Screw N...Round Head Screw S...Set ScrewN.+M3x6S.M
2Remember that your engine is not a "toy", but a highly efficient internal-combustion machine whose power is capable of h
38(71531000)(71531010)(72403050)(71521000)The specifications are subject to alteration for improvement without notice.SUPER FILTERLONG SOCKET WRENCHWI
40MEMOC Copyright 2009 by O.S.Engines Mfg. Co., Ltd. All rights reserved. Printed in Japan.60092240 1109026-15 3-Chome Imagawa Higashisumiyoshi-ku
4NOTESThis engine was designed for model aircraft. Do not attempt to use it for any other purpose.Mount the engine in your model se
6NOTESAdjust the throttle linkage so that the engine stops when the throttle stick and trim lever on the transmitter are fully retarded. A
8STANDARD ACCESSORIESF-5030 Silencer AssemblySilencer BodyABOUT THE ENGINEExhaust Header Pipe(W/M11 Lock Nuts)Please note that this engine is no
10Tools, accessories, etc. The following items are necessary for operating the engine.BEFORE STARTINGThe choice of propeller depends on the desig
12A fuel tank of approximately 320cc capacity is suggested. This allows around 14 minutes flying time, dependent upon the type of fuel
14It is suggested to use as heavy and rigid as possible engine mounting for highest performance and safe running. Conventional wooden mounting b
16THROTTLE LINKAGEBefore connecting the throttle to its servo, make sure that the throttle arm and linkage safely clear any adjacent
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