I am new to this forum and look forward to enjoying it alot. I do have a question to begin with. I am currently working on a friends craftsman mower, that he has hit somthing very hard with. In the past he had the flywheel key replaced. After dis-assembly, I found that the key was intact but mis-shaped abit. I installed a New key but it still acts like it is out of time. Is it possible that he might have spun the cam or other internal parts.