I went to the gulf coast this past weekend the engine ran fine until the last day. The water alarm started to make a vibrating sound and now it just wont turn over at all. I replace the impeller, water cooling sensor. Still nothing. I have to be looking near the rectifier and noticed a black melting substance. I removed the rectifier and the back of it looked like it was getting hot. It was was melted behind the recitifer. So, would that be the cause of my problem? Any suggestions would be apprecitated.