Outdoor Power Equipment (Lawn Mowers, Snow Blowers, Chain Saws and more) Discussions

I have a 1995 Ariens 932027 (ST724) snow blower that is frequently having the drive belt fall off. I tried replacing the belt, but that has not helped. The idler pulley seems to keep adequate tension on the belt. I have noticed some play in the drive plate that I am guessing is the problem. It seems that the drive plate may wobble with the pressure of the friction wheel, causing the belt to fall off. It was extremely frustrating to have to reattach the belt about 10 times while clearing the more than one foot of snow from last Wednesday's nor'easter. Any ideas on what might be causing this problem and how to resolve it?