I have a 1999 challenger boat with twin 787 engines. I put new engines in this spring. Went to start them, both engines started. The starboard engine would not start after shutting it down and trying to restart. It had no fire. So put a new stator on it and it again started once. It will not start a second time. The port engine is fine and starts and runs each time I try it. Does anyone have any idea what I should check or try to diagnose the problem