[trit21]

I think the rated Max rpm for these engines are 2600? If so, you need to reduce pitch or at least determine why they do not turn up to 2600 at a minimum. Head over to boatdiesel.com and start chatting with some of the guru's over there on how to make these engines last a long time. You are currently overloading the engines and if you continue to do so you are going to be in for a large expensive repair. You can learn a lot about what i takes to make a diesel engine last a long time, verify the entire seawater circuit is 100% and don't overload the engines which means verify they reach over 2600 (max rated) when you are loaded max (like a trip to the bahamas for example). Good luck.

Tom