The problem is probably your fuel. Gas will go bad after 2-3 months. Smell it and you can smell the stink. If so replace it and add a fuel stabilizer to your fuel. It will clean your carb as you use it and keep it fresh for up to two years. It will also help you on starting. Good Luck By the way it is gravity fed from the tank. And I would suggest you Flush it.
John at Rona, September 2004