A word of caution here: assuming we are talking about a Rotax, without the
spark
plugs, there is no blow-by to pressurize the crankcase, so the oil is not
returned
to the tank. Therefore the tank may become empty and you pump air into
the oil circuit. The crankcase may be flooded.
To use this method safely, you need to disconnect the oil return line and set it
so that the oil is drained from the crankcase by gravity, and refill the oil
tank at the same time to keep the oil level high enough.
Remi
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