I had a dry run on a used Honda 928 snowblower I just bought. When throttle is at full and then engage the auger, it momentarily squeals. At low throttle, no squeal. Is this common? What, if anything, should I do to rectify it? Am I in more trouble if I engage auger when there is snow already in the auger area? Seems lame to always slow motor to engage the auger and then rev it up again.