i'm investigating this issue on my husbands behalf... I've got a Lincoln sa200 that i can't get to shut off with the switch. I've replaced the switch and nothing. I replaced the pc board a few weeks before this started, but it was still shutting off until a few days ago. I replaced the pc board because #1 it was in bad need of it & #2 because the machine won't low idle. I'm thinking it may have something to do with the wiring to the pc board...pluged into wrong ports? Any advice would be much appreciated! If you need any extra details just ask! Thanks for any suggestions!!