This is a Yard Man snowblower, probably an early 90's model 5 hp tecumseh. I just got it this season, so I don't know how well it was maintained but it starts on the first pull and sounds smooth and quiet. I put a new plug in it. On the first appreciable snow today, I warmed it up well, then proceded to blow the 2-4 inches of powder and it stalled several times and I had to really inch it to keep it running. When it was blowing, the engine speed sounded very low. When it did stall, it started right back up. What can I try? This thing starts so easy, I'd like to get it running correctly...

Had saw along time, now it wants to stop running after a few minutes of use. tried to adjust high speed but not much luck. All I can think of it is the carb. would it be worth it to rebuild or does someone think it might be something else? And is it a big deal to rebuild one myself? THANKS FOR ANY REPLY