Mine has two switches - a key and a off/on/off slide switch. Does yours have two? Does it matter which switch is used? My key switch doesn't always shut off the engine so I just leave that one on permanently. Wondering if one switch is shorted.
Also, lights on mine come on with either switch not with the engine. Is your the same way? Short in lighting? I am interested to see how it turns out for you. I don't envy you one bit. Although mine has worked for several months without fail, I hate that thing with a passion. I'd rather have to saddle a horse than deal with that thing.