I have a 1991 Avalon 900 FS that has started giving me auger jamming problems. I successfully removed the motor and was able to manually unjam the auger by moving it back and forth. The motor was reassembled to the auger after lubricating the inner auger with a penetrating spray oil and being wiped dry. It turned on and worked again just fine for about 12 hours, then jammed again. Do I need a new auger? The motor was checked by direct line to outlet and turns well so I think that is ruled out. Where should I be looking into?