I have a 24 HP horizontal shaft Onan engine I want to use. I know how the wiring works on a Kohler but not this engine. The Onan is an older model. It has some sort of coil that the spark plug wires come out of and go to the spark plugs. It has three wires that go to a rectifier and only one coming off the rectifier. What I need to know is how to wire the mortor. I believe the last user had an electric fuel pump connected, not a vacum operated fuel pump. The starter has only one post on the bottom.