It is normal and you get used to it. The blower quiets down somewhat when you start pulling snow through it. I would check the allen screws along with any nuts and bolts after a few uses. When my BX 2750 blower was new, I found things loosened up quickly and had to be re-tightened. The bolts that attach the quick connect frame to the blower were amazingly loose after a couple of snowfalls. I used loctite blue on most everything and have not had the problem since. Have fun with the new blower! Dyer, retired