Piston and sleeve are toast. When I was running this weekend, the motor was running okay and then all of a sudden I lost compression and power. It made the temp gun temp HI when I pulled it off. I am debating getting a new one versus rebuilding this one. There is $150 difference that I am not sure I want to spend. I have already polished the rust off of the crankshaft and it is now shiny and slick as glass. I don't know as I have had nothing but bad luck with this motor. I think I want to do away with the bad karma and buy new, but the money is keeping me back from it.