This post was helpful in solving my exact problem. I had spark, gas, pressure but wouldn't start. The problem was; everyone said to choke, pull till it burps, then put the control to the next higher to start. Well, it never burped in my case at all as I kept pulling in chock. So, I kept flooding the engine every time. Now, one pull in chock, forget purp, then start on the next level. Thanks.