Hey Old Guy - that would have been a good idea - but it was a surprise to me that it happened at all. I've got a Stihl MS291 which routinely loosens the muffler screws and searching the forums, I see that I am not the only one with that problem too, and there are several posted cures to the problem. If the old Husky ran - I may investigate how to better hold the muffler on that one too! Drilled screw heads and safety wire - just like on the jet engines!!