I have a 1971 Ariens that I have used a couple times with no issues. Last week I tried to start it after a snow storm and it just wouldn't turn over. When pulling the pull starter sometimes the engine would try to turn over but then for some reason it would pull back on the starter rope which was still in my hand and I couldn't let go quick enough causing the engine to not turn over. Thinking it was an issue with the pull starter I took an identical pull starter off another Ariens I have and had the same issue. A couple times I noticed a flash and smoke coming from the carbutator. Here are the steps I followed to try to start it (the steps printed on the engine). Put the choke to full. Hold down black button while slowly pulling starter once. Try to start it with black button released. I seems to want to turn over after that but like I said it pulls back on the starter rope and fails to turn over. I also noticed it seems like it is closer to turning over at half choke position. The last couple times I got it to start and used it I had to very quickly flip the choke lever off or it would die right away. It is snowing right now and were supposed to have a lot of snow tomorrow so I would appreciate some troubleshooting steps I can try tomorrow. I have very little experience with these types of machines but I'm mechanically inclined and can follow directions. Any advice is greatly appreciated. If you need more details to better advise me let me know.