i recently purchased a second B1700 HSD that came with a B2650 Blower. My other B1700 HSD has a B2550B Blower. When i purchased the B2650 the first stage augers were turning clockwise pushing snow out of the housing. B2550B turn counter clockwise and works just fine. The second stage auger on the B2650 turns the proper direction counter clockwise. I'm wondering if it was possible to install the wrong worm gear. To buy a replacement non returnable worm gear is over $330.00. Any help is appreciated.