I have a self propelled Brute. The mower has sat for more than a year with fuel in the tank. I replaced the spark plug, air filter, drained and re-fueled, added a fuel conditioner. It will not even attempt to turn over unless you spray starter into the carb. as long as you continue to spray it will run but will quit immediately when you stop. It seems like no fuel is getting to the carb but I removed the fuel line and fuel is flowing.