Sno-trac snowblower 314450502

My snow blower starts very well runs smooth. I adjusted the carburetor and got some good gas. After running about 30 secs or when warm under load, it just stops. Easy to re-start but same again. I opened the carburetor and check for anything missing. The carb has no dirt in it and is clean. Gas runs well from the tank. Followed guide and videos for adjusting the carb good.

Help why does it shuts down after warming up and under load.

 

"Just stops, but easy to re-start". How long after it stops are you able to restart it? Immediately? A minute or so? If it restarts immediately, and since you said it otherwise runs fine, I would be inclined to try some Sea Foam in the gas to see if that might clear it up. Otherwise, I would overhaul the carburetor, as you probably have a little bit of something in a small space. If you have to leave it set for a minute or so before restarting, I would check the plug as soon as it stops, to see if it has a good spark. If not, could be that your coil is breaking down. Otherwise, it's back to the carburetor.

 

Coil: this model has a magnet tied to the cable to the spark plug. I am hesitating to open this up.
I will try a new spark plug.
Carburetor. In opened the bottom a few times. It might be that I did not set the needle valve properly. It is so simple that i am not sure what I could do wrong here. When I opened the carburetor I never seen any dirt or scrap about the float.
One thing I wanted to check and forgot, it has been about -22C and I am not inclined to spend that much time bare fingers. I did remove the key and the wires in behind to prevent it from starting. It has been like this for about 10 years now. When I looked at it. I cannot see what could go wrong.
Still puzzled

 

i should add that it has been very easy to start back almost immediately. Push the gas pump once or twice and pull the cord.

A few times, I think I flooded it and it took longer.

When I stopped it, it drained a lot of gas from the carburetor