User manual OS ENGINE FS-56A

[. . . ] It is of vital importance, before attempting to operate your engine, to read the general 'SAFETY INSTRUCTIONS AND WARNINGS' section on pages 2-6 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. CONTENTS SAFETY INSTRUCTIONS AND WARNINGS ABOUT YOUR O. S. [. . . ] Do not screw the silencer on the header pipe more than 10mm , or it hits the silencer assembly screw. Adjust the silencer position by rotating the silencer. Apply silicone sealant to the threads to prevent the silencer and header pipe from loosening and leaking oil. Exhaust Header Pipe Nut Exhaust Header Pipe Apply silicone sealant. 17 The exhaust outlet of the silencer can be rotated to any desired position in the following manner: 1) Loosen the locknut and assembly screw. 2) Set the exhaust outlet at the required position by rotating the rear part of the silencer. 3) Re-tighten the assembly screw, followed by the locknut. Model engines generate considerable heat. Do not touch any part of your engine until it has cooled. Contact with the muffler (silencer), cylinder head or exhaust header pipe, in particular, may result in a serious burn. Keep your hands and face away from exhaust gas or you will suffer a burn. Assembly screw Exhaust pressure nipple Baffle Turn to reguired position "O" Ring Locknut Exhaust outlet 18 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. This will give approximately 12 minutes running time when some part-throttle operation is included. Locate the fuel tank so that the center line of the tank is 10 to 15mm below the center line of the needle-valve. For plumbing, use heavy duty silicone tube of 2. 5mm inner dia and 5mm outer dia. Be sure to use a pressurized fuel system by connecting the muffler pressure nipple to the vent-pipe of the fuel tank. Locate the fuel tank as close to the engine as possible to minimize fuel level head pressure variation. needle-valve Center Line Approx. 10-15mm Fuel Tank Center Line Approx. 15mm 19 PROPELLER There is a risk, particularly with powerful fourstroke engines, of the propeller flying off if the prop nut loosens due to detonation ("knocking") in the combustion chamber when the engine is operated too lean, or under an excessively heavy load. Install this as follows: Propeller washer Locknut Propeller nut 1. Install the prop to the engine shaft, followed by the retaining washer and prop nut and tighten firmly with a 12mm wrench. Add the special tapered and slotted locknut and secure with a 10mm wrench (not supplied) while holding the prop nut with the 12mm wrench. 20 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. The locknut should be tightened firmly after retightening the propeller nut. 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. [. . . ] As previously mentioned, it is vitally important to avoid operating the engine in conditions where dust, disturbed by the propeller, may be deposited on the engine and enter its working parts. Remember to keep your fuel container closed to prevent foreign matter from contaminating the fuel. Install a fuel filter to prevent dirt and foreign matter in the fuel container from entering the fuel tank. Super Filters (L) and (S) are available as optional extras. 31 Install an in-line fuel filter between the tank and carburetor to prevent dirt and foreign in the tank from entering the carburetor. [. . . ]