These little engines are too easy to find and too cheap to fool with a bad piston and/or cylinder. It will just give you grief. Keep looking, and before you know it you'll have dozens of little engines. Check small engine repair shops. They often have an area where they store machines that customers never came back for, etc. and will sell them cheap. Yard sales and garbage dumpsters are fair game, and I know one guy that made a deal with his garbage man to bring him yard work machines. Before he knew it he had more than he knew what to do with. They are out there....

AV8TOR