Are these 2-or 4-cycle engines? Someone not associated with this forum recently told me that mixing STA-BIL with the gas helps in starting. I had only used it in the past for gas that I knew would be stored for several months before I could get around to using it, but he said it's also good for engines that balk at starting. I don't have any like that, so I haven't been able to test this idea. He claimed it worked for both 2 and 4 cycle. Maybe you'll want to try it.I've been having problems(not starting)with some of my equipment,the dealer says it's the new fuel formulation,has anyone else had problems?