HI All,
Dan was nice enough to spend some time on the phone with me last night, and talked through a couple of options and ideas. While on the phone, I pulled the intake and reed plate and took a peek into the crankcase. I don’t see any signs of rust on the crank or bearings. Dan has the idea of trying to flush them with WD-40 to see if any crap comes out. I’ll do this this weekend.
One thing to note, it that I have run this motor for 3 to 4 tanks of gas since I completed my boat back in September. And it was operated a lot at or near WOT (too much fun cruising!). Dan said this indicates that the crank may be fine. Other things from the conversation, were the fact that both pistons were equally black, so he didn’t think any significant amount of water was getting into the motor
One last concern that I noticed, was some significant scoring on the top piston around one of the exhaust ports. This I can feel, but the cylinder wall is still smooth, and both cylinders have ~115psi of compression. So, I’m not sure if this is another argument to crack the crankcase open and do a full rebuild (new pistons, hone/bore block, fix crank?).
