I could just get the motor to turn when I got it but now it was stuck. Took a 50/50 mix of gas and oil and put about 8 oz. in the crankcase and some in the cylinders. Sloshed it around once a day and after a few days it would move again. One half of this exhaust port was almost totally blocked with carbon. After cleaning it out, I positioned the piston so I could check the rings. Both were stuck hard. I was hoping not to have disassemble the power head but with all the carbon in this motor it seemed to be necessary. Turned out it’s a good thing I did. The wavy thing, I’ve been told, is a back fire suppressor. They can break up, like this one has, and go into the crankcase. As you can imagine, that is not a good thing. Even if you find them to be in good condition you should remove them. The rings freed up pretty easily except for the top ring. It was only stuck in the area of the exhaust port. It took forever to get it free without breaking it. Piston and cyl. both look good.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.