User Manual

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Attention :
Do not choke the carburetor air intake when
applying the starter. This could cause an
excessive amount of fuel to be drawn into the
cylinder which may initiate an hydraulic lock
and damage the engine.
If the engine does not start within 10 repeat
applications of the starter, remove the glow-
plug, check that it glows brightly and that the
cylinder is not flooded with fuel. (To eject
excess fuel, close needle-valve and apply
starter with glowplug removed.) Then try again.
Note:
Make sure that the throttle linkage is made
so that the throttle is fully closed when the
throttle lever as well as trim lever on the
transmitter are fully pulled down.
How to stop the engine
Pull down the throttle lever and trim lever on
the transmitter fully.
Close
VERY IMPORTANT!
Before being operated at full power (i.e. at full-
throttle and with the needle-valve closed to its
optimum setting) the engine must be adequately
run-in, otherwise there is a danger of it becoming
overheated and damaged.
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Install the engine with the propeller intended
for your model. Open the needle-valve to the
advised starting setting and start the engine.
If the engine stops when the glow plug
battery is disconnected, open the needle-
valve to the point where the engine does not
stop.Run the engine for one minute with the
throttle fully open, but with the needle-valve
adjusted for rich, slow "four-cycle"operation.
RUNNING-IN (“Breaking-in”)
Now close the needle-valve until the engine
speeds up to "two-cycle"operation and allow
it to run for about 10 seconds, then reopen
the needle-valve to bring the engine back to
"four-cycle"operation and run it for another
10 seconds. Repeat this procedure until the
fuel tank is empty.
2.
All internal-combustion engines benefit from
extra care when they are run for the first few
timesknown as running-in or breaking-in.
This allows the working parts to mate together
under load at operating temperature.
Therefore, it is vitally important to complete the
break-in before allowing the engine to run
continuously at high speed and before
finalizing carburetor adjustments.
However, because O.S. engines are produced
with the aid of the finest modern precision
machinery and from the best and most suitable
materials, only a short and simple running-in
procedure is called for and can be carried out
with the engine installed in the model.
The process is as follows.
1.
Re-start and adjust the needle-valve so that
the engine just breaks into "two-cycle" from
"four-cycle" operation, then make three or
four flights, avoiding successive "nose-up"
flights.
3.