Well done speedy, so what did you actually do? Did you just clean the piston up, reused the original rings? What did you clean in the carb and do you have any rev control on it?. Did you see inside the crankcase as to what controls the revs in there?. I am going to pull one down when I get a bit of time to see if I can work out what exactly goes on in there. I think they have potential as a good strong motor if the revs can be controlled. I believe the carby is blamed for a lot of these being thrown out and I don't think they are the real cause of the problem, just part of it. They must have sold millions of poppets, diaphragms and "O" rings to no avail, mower then dumped