It may fire but shortly dies. So I took it to the dealer. They just turn up the idle screw. I also changed spark plug. Now it starts but seems to run a little too high and backfires when i cut it off. I took out the screen in the muffler. Iam waiting for the new muffler to come in. Should the carb need cleaning? It looks like its in a closed in system I wouldnt think it would be dirty? Other than that i dont know. I may just need to adjust the idle screw a little. Wondering if anyone else has had any similiar problems with their redmax. by the way its 2 years old and this is the first time i have had any problems. Love redmax.