RB Concept engines - Running-in Procedure

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Tip: When the piston/sleeve is still new the fit can be very tight and

so at first starting the engine can be quite difficult. To make this easier,

you can heat up the engine with a hairdryer before starting.

If the engine fails to start…

· Check if the glow plug is still working.

· Check if the battery of the glow driver is properly charged.

· Check if the fuel is reaching the carburetor.

· Check that the engine is not flooded.

6) If you have your engine equipped with a pull starter, then proceed as

point 1 to 5 above. The only thing which is important to know is never to

pull the cord all the way out, limit the pulls to 12 inches(30cm) and do not

insist when the engine is flooded since you can break the cord which then

has worked like a failsafe. If your would not break the cord, then you

probably can break something else inside the engine which then is worse.

5) Running-in procedure

A nitro engine is a mechanical masterpiece and requires careful running

in to allow the internal parts and tight tolerances to match and reach proper

operating clearances. The proper running in of your engine determines its

eventual performance and life. During this procedure, if you run the engine

too lean and/or you let the engine make too much rpm, you shorten the

life and performance dramatically, and you can also permanently damage

the engine. Running in the engine while installed in the car takes some

time, but it also allows the driveline components of the car to operate

together for the first time under controlled conditions.

1) Once you have started the engine let it run at idle (low RPM)

for at least 125cc of fuel, the idle must be regular, and if the RPM goes

down and the engine stalls, you must close the idle needle (1/4 turn at a

time), and if the RPM goes up, you must open the idle needle.