What to do when your snow blower won’t start
Checking your spark plug is also good practice as they can gum up quickly and are easy and cheap to replace. If your spark plug is wet when you remove it, you flooded the engine and will need for some of that excess fuel to dissipate. Check the gap size and also check for cracks in the porcelain.
Another problem that may occur with dual stage blowers is when the impeller stops working. The impeller (also called a turbine, or second auger) turns behind the main auger to help propel snow outwards through the chute. As long as this is turning you know the belt is good, but if it isn’t, the first thing to look for is if the roll pins are still intact.
Also be sure to check your fuel cap vent before getting too drastic. Air needs to enter the tank to make up for the fuel that is being used. If the vent is clogged it can stall out the engine. Try running your machine with a loosened fuel cap for a bit to see if that might be the cause. If so, then you may just want to purchase a new cap.