[quote: Truckracer]
On the Q-75, the lug on the mag coil nearest the iron core is grounded ... usually to one of the mag retaining bolts. The other lug, and a larger one located farther from the core is the kill connection and like Charley wrote, kills the engine when grounded.
[/quote]

Thanks for the correction. I've not seen the Q-75. Should have confined my answer to how the switch operates.

CR