Hey Guys. Way back when i bought a craftsman leaf blower. I realized that it can only be used around the house. Not commercially. Well anyways, the screws kept coming loose on the muffler and it just rattled off. The same thing is happening to my John Deere Trimmer. What does this mean when the screws are comming loose off the muffler. Does it mean that it's about to die? Anything will help. Thanks!