O.S. engine FS-120S-E Manuals

1 pdf manual(s) O.S. engine FS-120S-E for free download (Document Types: Owner's instruction manual)

O.S. engine FS-120S-E Owner's instruction manual [PDF] (13 pages)

  • Identifier: id-1019898
  • Brand: O.S. engine
  • Device: FS-120S-E Engine
  • Type: PDF
  • Key Aspects: Common Issue Diagnostic Flows, Basic Configuration Guidelines, Environmental Factors and Restrictions
  • UPD Date: 22.07.2026
  • Source File: 1138580.pdf
  • Pages: 13
  • Description: Instruction reference guide for the O.S. engine FS-120S-E.
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  • 2 Remember that your engine is not a
  • 4 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 carburettor. Adjust the throttle linkage so that the engine stops when the th
  • 6 The needle-valve and throttle lever locations are interchangeable by reversing the carburetor. This can be done as follows: Remove the carburetor carefully by unscrewing the two screws which secure both carburetor and choke valve. (See Photo 1.) If the carburetor remains difficult to remove, slightly loosen the two screws which secure the intake pipe to the cylinder head. After reversing the carburetor, re-fit it to the intake pipe gently, taking care no
  • 8 NEEDLE-VALVE EXTENSION The needle-valve supplied with this engine is designed to accept an extension so that, when the engine is enclosed in a cowling, the needle-valve may be adjusted from the outside. An L-shaped rod, of appropriate length, may be inserted in the needle-valve knob center hole and secured by tightening the set-screw with a 1.5mm Allen key. THROTTLE LINKAGE Before connecting the throttle to its servo, make sure that the throttle arm and
  • 10 FUEL The FS-120S-E should be operated on a methanol based fuel containing not less than 18% castor-oil, or a top quality synthetic lubricant (or a mixture of both), plus a small percentage (5-15%) of nitromethane for improved flexibility and power. The carburettor is adjusted at the factory for a fuel containing 20% lubricant and 10% nitromethane. Some commercial fuels also contain coloring additives as an aid to fuel level visibility. In some cases, th
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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 instructions supplied with the aircraft, radio control equipment, etc., are accessible for checking at the same time. 1 14-15 SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O.S. ENGINE INTRODUCTION, INSTALLING THE GLOWPLUG BASIC ENGINE PARTS RELOCATION OF CARBURETTOR CONTROLS CHOKE VALVE FUEL TANK, INSTALLATION EXHAUST HEADER PIPE AND SILENCER, THROTTLE LINKAGE, NEEDLE-VALVE EXTENSION PROPELLERS, PROPELLER AND SPINNER ATTACHMENT FUEL GLOWPLUGS CARBURETOR CONTENTS RUNNING-IN IDLE MIXTURE ADJUSTMENT VALVE ADJUSTING CARE AND MAINTENANCE O.S. GENUINE PARTS & ACCESSORIES ENGINE EXPLODED VIEWS & ENGINE PARTS LISTS CARBURETTOR EXPLODED VIEWS & PARTS LIST ENGINE THREE VIEW DRAWINGS NOTE STARTING 12-13 2-4 5 6 7 8 9-10 10 11 12 24 15 16-17 18 19 20-21 22 23

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