O.S. Engines 18TM Revo - Manual (Page 19)

The carburetor of this engine is set at starting
setting when the engine leaves the factory.
Switch on the transmitter, and check that all the
linkage movescorrectly.
Remember!
It is vitally important to set
the throttle at the correct
position before attempting
to start the engine. If the
engine is allowed to run
with the throttle too far
open under "no load"
conditions, it will rapidly
overheat and may be
seriously damaged.
When the engine starts, first allow it to operate
in short runs on its very rich starting settings,
with the glowplug battery still connected and
with its driving wheels clear of the ground. The
rich mixture will, under these conditions,
provide adequate lubrication and cooling,
indicated by profuse smoke from the exhaust.
Next, disconnect the glowplug battery and try
running the car on the track. If the engine
stalls, open the throttle fractionally, but try to
keep the engine running as rich as possible: if
it stops because of being excessively over-
rich, close the Needle-Valve 30° and try
again.
Run the car on the track until one tank of fuel has
been consumed, then close the Needle-Valve
30°. Repeat this procedure again until five tanks
of fuel have been consumed, during which time
the throttle may be opened for brief bursts of
increased power. If the engine stops at medium
speeds, close the Mixture Screw 45-90°.
Needle
The position of the needle-valve
when starting the engine.
Close the needle-valve approx.
30 deg after running the vehicle
every one full tank of fuel.
Repeat this procedure around
five times.
18