Hydraulic oil lock has been with us since the very first 912 was installed on a model 3. It is not new and is easy to live with if proper procedures are used before starting your engine for the first time each day.


I agree with Av8r3400. The oil system on the Kitfox is tried and proven. The shape and size of the oil tank is integral to the proper function of the oil system. Reinventing the oil tank could lead to unexpected consequences as could installing shut off valves in the oil lines. I would not recommend either approach.
The new oil filter from Rotax is designed to reduce this condition. It has helped using the new Rotax oil filter. I still, out of habit, pull my prop though many times before starting the engine after the aircraft has sat for a period of time to make certain no oil has gotten into the cylinders.

P.S.- never pull your prop in reverse direction to engine rotation to clear oil out of your cylinders.