Thanks mac for the info there ...... realize there is no connection to the gas generator thought that the oil required to drive the prop to fine would require some hp too ??? is the temp that critical on the batteries ?? and the starter gen has its own fan so that as soon as you start cranking it has air going through it. When we start always leave in feather till oil temp in the green starters always make overhaul no problems. Just wondering not being smart....... thanks again byee