Have a YardMan 31cc leaf blower. Having trouble starting it. Can only get it started if I "prime" it with carburetor cleaner and then it only runs with the choke in the middle of its three positions or fully closed. If I open the choke to fully open, it quickly stalls out. Have replaced the spark plug, using a fresh mix of gas/oil, tried cleaning the carburetor with cleaner, and adjusted the idle speed, but still can't keep it running. Have also cleaned the air filiter and checked the spark arrestor (was clean). Other than throwing it away (only 2 years old, but only cost about $70 new) and buying another (a refurbished Craftsman 25cc for $60), any suggestions to get this guy running. Thanks.