LOL...Thats like asking if your tires on your car are to far out of balance if your teeth chatter at 55mph.(sorry. it just struck me funny) Yes I feel that would be a good indacation that the motor, either itself or the prop is a bit too far out'a balance. Of course we all assume that the motor is bolted to something ridgid and if you can say the prop is good to go then the mis-match of parts has got to be a good place to start. Piper