Let me preface this by saying I love my engine. It hand starts easily, is easy to set up, has plenty of power, and is reliable as heck. Anyway, the other day I noticed a small scrape 1/4 of the way around the flywheel which looked like it was from the metal ATM pickup. I figured that it had come loose as noted in another thread, but it was tight. I then checked for bearing play but everything is tight like it should be. I just don't understand how this could have happened. I moved the pickup further from the flywheel just in case. Any ideas on what the heck could have caused this? I don't think it's going to be a problem, but am just wondering what happened so that I can prevent this from happening again.

No biggie.