I've got a customer who wants me to fix his clipper elite mower. It's a 7224. The problem is that it throws the drive belt not three minutes after reinstalling it. A new belt didn't help. It's a wierd setup, It almost looks as if it needs a special belt. I contacted the company that makes it, but they never contacted me back. My customer keeps bugging me about it though. Any suggestions from someone familiar with these units?