O.S. Engines 91HZ-R 3C - Manual (Page 16)

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5. Inserting the starter shaft
Insert the starting shaft into the
shaft cup securely.
6. Priming
Check the movement of all the controls after
switching on both the transmitter and the receiver.
Then, fully open the throttle valve without heating
the plug. Turn the engine with an electric starter
until the fuel comes into the carburetor inlet.
Stopping the engine
Fully pull down the throttle trim on the transmitter.
Starting
Connect the battery to the glowplug and start the
engine by applying the starter. When started, switch
off the starter and withdraw the starting shaft after
making sure the rotation of the starter shaft stops.
Preparation of starting 7.
8.
9.
Hold the rotor head by hand so that rotor cannot
rotate when the engine is Started. Also, steady the
model with a foot on the landing gear skid.
Make sure that the transmitter
throttle stick is at the fully closed
position and the throttle trim at
center position, and make sure
that idle-up switch on the
transmitter is off.
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In case the engine does not stop.
Hold the rotor head, and pinch the fuel line to stop the
fuel supply. If it still does not stop, pull off the fuel line
from the carburetor.
It is necessary to readjust the throttle linkage so that
the carburetor rotor is fully closed when the throttle
stick and throttle trim on the transmitter are fully
pulled Down.
NOTE:
If the throttle response is poor or the engine
stops due to a temporarily over-rich mixture im-
mediately after the engine is started, pinch the
fuel line for one or two seconds until the engine
r.p.m. increase and the engine runs steadily.
Reminder!
Never touch, or allow any object to
come into contact with, the rotating
rotor.