110hp engine on a 42ft boat - repower?

[Shaneesprit]

Originally Posted by more

No,you are wrong. Diesel engine like 70-80 rated RPM and power less better for example 75% rpm and 50% rated power be nice and prefer.

Correct and
50% is considered minimum running load, and you probably need 65% load, very few hours if not achieving 50% often.

Don’t know what you should do here, how many hours does the engine have?
If you’re going to change the MWM ( that they don’t make anymore ) then sell it before removing it.