Annie,i have the same problem except mine is hard to start cold and fires right up when hot i was told to completly clean out carb. poss.dirt varnish etc.also there is a needle vavle with a rubber o ring i cant think of the exact name of the vavle . anyway if the o ring is not seated thats another poss. besides a vavle adjustment. i would check that out b4 doing the vavle adjustmeny