My question is about an Ariens snowblower model 932100. The auger does not engage. The sheer bolts are OK and the second stage auger does work. The belts also seem OK. What could be the problem, thank you, John

With engine off and augers enaged, can you rotate that auger by hand?

Hi,
A succinct question Bob. Hopefully this will be a link to the Ariens PartsRadar where the correct diagram will be the Gear Case and Impeller for the associated parts.
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Peace,
Clarke