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  • You must run-in the engine before flying.
  • Do not rev up for five minutes while warming up.
  • The running-in is over after consuming 10 liters of gas.
  • The lifespan of your engine can double with a proper running-in, while with a bad one you may damage it since the very first hours of working.
  • In the first phase of the running-in the engine must be switched on for increasing time starting from few minutes and off for the time necessary to cool.
  • While on, the engine must be gently set at different revs, starting from the lowest up to the higher.
  • Repeated revvings are unsuitable, the clutch may be surcharged.
  • After each switching off, do carefully check all the mechanic parts, bolts and knots.
  • After at least 10 minutes of work you can fly, gently,  avoiding high revs. for too a long time. 
  • After the first 30 minutes of run, do check all the bolts, knots and screws, particularly those of the engine and the prop as well. Those of the engine (bolts and knots) must be checked every 5 hours of flight.
  • At this point, you can fly. However avoid long periods of full power, and vary the throttle setting often. For heavier pilots that require more power to fly, it is recommended that 1 hour of non- flying break-in be completed before flying

Loss of Power

Engine overheating may occur while running-in, you can recognize it by a loss of power.

In this case is very dangerous to keep it on, it is better shutting off and let cooling, OR, AT LEAST SLOW DOWN BELOW 5000 RPM before applying more power

A loss of power may occur because a mixture too lean, following a wrong carburetor setting or dirty in the filter, do check for such possibilities before restarting the engine

In case of overheating it is advisable to check the head screws to verify the seal of the motor head, see locking torques. Usually a loss of seal can be perceived by dull strokes at starting or by oil leakage, once the air conveyer is removed.