I had three bad instances with the ethanol they add to the gas. Seems if you let your old ride sit for a while the gas evaporates and leaves behind a sticky corn mess. My Shebly Dakota died twice on me. My Aspen wouldn't start because the needle valve underneath the shooter got stuck closed. And just lately I could not start the Gran Fury. Stuck float valve was the culprit. All issues have been resolved now and won't return. I use Lucas Oil Product's Safeguard Ethanol Fuel Conditioner. One 16oz bottle treats up to 80 gallons of gas.