Popped off the cover on my BX2750D blower today to oil the chain. Happened to notice that the pin was sticking out and when I touched it, I was able to slide it freely. Not good. Looked further and the set screw that is supposed to hold it in place was entirely missing. Other set screw was in place. Went to dealership and got 2 new set screws. Put them both in - (these are longer than the one that was in there before and dealer recommend to even replace the one that didn't fall out, so I did). Fortunate that I caught this. If the other one had come out, I suspect I would have had a mess on my hands with parts flying everywhere. Not sure if the set screws were not tightened properly at factory or what. I will now make sure I check them regularly.