Hi there! I want to do the following completely silly thing,unless someone else did it already before me....1.Take my engine apart . (may be any current 2 or 4 stroke ) 2. fit propeller hub,unbalanced propeller (plus its washer& nut etc. ) to crankshaft . Mark angular relationship of propeller rel. to crank 3. Balance this whole setup. 4. Re-assemble everything , see what happens-unless-see above