O.S. Engines FS-91 II FI - Manual (Page 21)

21
CARE AFTER USE
First vent the pressure from the fuel tank. Next, drain any fuel in the fuel tank. Turn on the
transmitter and receiver switches but do not heat the plug. Move the transmitter engine control
lever to the center position without heating the plug, and then turn the engine over with the
electric starter several times. (This is done to discharge any fuel between the tank and the
injector.) Pour a little after-run oil in the air valve and turn over the engine with the starter several
times.
In order to maintain the engine in the optimum state, it is important to vent any residual gas
generated during engine operation as quickly as possible. In addition, since this engine uses a
manifold and tuned silencer, residual gas may be present in these components as well. It is
recommended to remove the tuned silencer after use and store it.
Connectors and leads are arranged in the engine compartment. They be soiled with dust or
other debris. (This can cause a malfunction.) Clean these components to prevent them from
becoming soiled as much as possible. Do not use paint thinner, gasoline or other cleaners that
erode plastic when cleaning.