Not to be off subject, here, but mine is the Tecumseh motor on the Ultra SE, and mine has a bad "delta switch". It was doing the random "spark and start when it wanted" thing. I unwrapped and unhooked a wire plug at the lower right (when standing on the machine). Now, I just keep the wires disconnected and touch the wires together when I need to shut it off. I just haven't got around to ordering this new switch yet (which contains the whole wiring setup).