I have a 2004 120 HP westerbeke in a 44' sailboat. In 3000 hours I have had 3 damper plate failures. the 1st less than 400 hours. The manufacturer is no help. Any ideas??? This is dangerous and expensive.
Wow! That's a bad track record. Is it the springs that are giving way, or is there something else that is breaking? Are you sure your engine is properly aligned? Stupid question, but is the transmission properly supported? Is there something else in the propulsion system that could be adding vibration at a particular RPM (or at WOT) that would contribute to the damping plate breaking?