Ok, I've seen a pattern on here with this same problem. Sometimes I can turn the switch on and it will start and then turn it off and back on and no fire but will turn over and over. Its getting fuel no spark. Turn it off and back on sometimes it will fire off and sometimes not. I don't know why. There is no rhym or reason of what is happening. But I've noticed quite a few people on here with the same problems. Any one have any answers.