For some reason my coil has burnt out on my Wheel Horse 518H Onan 2 cylinder unit. I have just bought the unit second hand and its been in a field for a couple of years. There is no start on the key switch so not sure where that is but when powering up the ignition the col burnt out. I cannot see this type of clamp down wasted coil for sale anywhere have they replaced it with something else???. What is the easiest way to wire it up for ignition and starter system?