I have a Craftsman Blower/Vac Mulcher. 32cc, 170 MPH, 360 CFM. I can get it to start just fine and it will go to full RPM when I hit the throttle but weather it is full throttle or just idle, it will kill after about 5-7 seconds or so every time. The choke is off and the gas is new (few months anyway). What could be the problem and what should I try? Thanks