C950-52474-6 snowblower starts but don't stay ignited

Many small engine problems such as you described are fuel related. In today's world, most of our gasolines are blended with ethanol and thus gasoline shelf life has been reduced to 4-6 months. It is important that after each season's use you be certain to run the snowblower until all gasoline in the tank and carburetor have been used - effectively running the snowblower out of gas. If you did't do that last season the "old" gasoline in the carburetor has began to gum up and will not let the carburetor mix fuel and air properly. The solution will be to remove, disassemble and clean the carburetor. It is likely the gas tank will also need to be drained, removed, and cleaned. If you are unable to do this you will need to take to a qualified small engine mechanic in your area.

Lastly and, very importantly, make certain when you are ready to use your repaired snowblower that you use FRESH gasoline. And, remember the first part of this discussion at the end of the season.