I have an Ariens ST 1032 with the HM100 on it. I forget the exact model number; but this one is black, has the engine-mounted throttle, primer on the blower housing, small recoil handle and as I recall, POINT and CONDENSER ignition. The last time I tried to start it, it ripped the starter cord out of my hand a number of times and even backfired so bad that I lifted the whole back end of the whole machine off the ground with the starter cord! Sometimes it would try to run intermittently. Once it finally fired off, it ran great for the whole, wonderful snowblowing experience. Ideas?