Hello all. This is my first post. I noticed that our Jet Jam boats randomly cavitate (or ventilate) when the water becomes slightly choppy. It seams as if the jet drive system gets too much air inside the chamber which causes the boat to stop temporarily until I let off the throttle and let the chamber fill back up with water again. When it first happened, it sounded like the impeller shaft came loose because I could hear the motor revving but the boat sat motionless. There's no way to move components around to balance the weight inside the hull so I'm not sure what to do. Any ideas?