Found bad auger motor drive shaft, it was rounded on the end that goes into motor. While I was there I replaced the seal, auger (old one rusty) and coupler. The new auger is stainless steel (I believe and slightly longer) and should not corrode like old white one. If changing auger, make sure you put the assembly back together correctly (take a few pics of the old one and lay it out as taken apart). As always, parts arrived quickly.