Well, first off, its one of my landscapers fathers that he asked me to work on. Yeah, I'd be glad too. I'm regretting those words now. Heres the problem. Had several air leaks. 1 in the fuel line, 1 in the impulse where it comes through the intake block. Took care of those. Theres one remaining one pto side seal. Put a piston stop in the bore and tried wrenching it off. Wasnt coming off. So, got the air impact. I've had one saw that I couldnt get it off with. That one I had to heat up the clutch past melting red and it finally came off. Put the air gun to it, it was on there so f****** tight it pushed the stop up and boogered up the spark plug threads. The piston stop was down tight, before you ask. Got the threads all back to normal, tried it again, same result. I dont want to heat it, not yet. Do you guys think some PB on the clutch and crank will help. Dont want to send it away for a spark plug hole insert! Or is there something else that Im missing that will work?