Heard a loud "bump"

Jun 4, 2004
292
Hunter 49 123
Check your engine mounts again. I had the same clunking noise when I shifted gears and when revving up. It turned out that 2 of the bolts were sheared and the only way I found out was because I wanted to check shaft engine alignment when the nuts with 1/2 of bolts came off. Unscrew the top nuts a few turns of all 4 mounts.
 
Jun 2, 2014
589
Catalina 30 mkII - 1987 Alamitos Bay Marina, LB, CA
I took the boat out last weekend for a day fishing trip and didn't hear anything strange this time. I'll keep looking for something, but haven't come up with anything yet.