I have had an issue with my h75 on the ignition. First turn it on no spark. If you leave the switch on for about 1 minute it will have spark and runs fine. I've tried new batteries, different brands of batteries, same thing. So now I turn it on, put fuel in tank and oil it and by then it's ready to run. I've had this issue from the start. I've got a new ignition for it but figure run this one till it stops working completely then I'll change it.