Ok, im going to be getting a boat here within a week hopefully. It has a 170 in it, from which I gather is a 3.7 inline 4. No problem there. Here's the question, with some info. Guy said the motor needed replaced, as the mechanic left the plugs out, and the cylinders rusted. He pulled the head off to check it, and the best answer I can get so far is that it could be rebuildable. If I get this thing and the rust appears to have not caused pitting, and the motor will turn, could I just clean the rust out of the cylinders with PB or WD-40 or something, slap a new head gasket on it and go to town? Obviously, the head would be looked over since its off, and normal maintenance done to it before firing it up, ie. Oil change, etc. I may even fill the cylinders up with marvel or something for it to soak on the rings. Just didn't know if I could get away cheap here, with some gaskets, time, and fluids? Thoughts?