My wife an I bought a 1976, and although the engine runs, we are thinking about repower, for a number of reasons. Everything I hear so-far is that the old Yanmar is underpowered. We have a 12 year old with CP, and the certainty and relaiability of a new motor makes sleeping easier. We have to a fair amount of cabin work over the winter and it just seems to be the best time to do it now. I have obtained some super prices on a new 18 hp Westerbeke, and a new 16 hp Vetus. I am a novice and I keep hearing Yanmar is the way to go, and there are not a lot of good rebuilts around. Anybody have any thoughts or suggestions. One person told me 1 hp per foot, but thats one persons opinion. Help?