also just make sure the throttle is up, i dont know how many times i've seen people take the mower out of stroage and the throttle jsut be all the way down.... best way i find to start a mower is to pusht he throttle all the way down, and then try and start it, then slowly pull up and down on the throttle once it catches and starts... also you might want to try and block the air filter and then unblcok it once it starts (think engine choke)