Does anyone have a diesel Yanmar YSM12 in your boat in the Jacksonville FL area. If so any chance I could meet up with you. I'd like to make a few comparisons. I'm not sure if I have a low rpm problem or not. Would save me a lot of work. when I bought the boat I could rev up the engine to where it felt like it wanted to jump out of the boat. After setting for 4-5 months it hasn't been the same. Had a mechanic look at it and fiddle with the governer, injectors.... starts up with no problem. I'm wondering if my fuel line has something in it??? or maybe the governer wasn't working at first? don't know?? Tks Steve