lefty wrote:This is a neighbor's machine. The machine would start and run but after warm, it would not restart. He called me over and I tried to start it but it wouldn't. And it would kick back on the rope every full pulls.
Would have been very helpful from the start - First thing to check every time would be the flywheel key
Valve clearance would have been the next thing to check (for maintenance at least even if engine ran fine after fixing the key issue) I'll bet you have a sheared key.