Help Identify this switch

[jmoneilthe2]

I am preparing to rewire the console on this 87 GW Seafarer. Next to the 4 toggle switch panel is a single toggle switch that I have no idea what it controls. Does anyone have an idea? Thanks.

 

[DennisG01]

Looks like a kill switch. Flick it down and you probably won't be able to start the engine. If it's still operational, that is. At 40 years old and who knows-how-many-owners, you never know!

 

[seasick]

I agree with Dennis. Looks like a kill switch ( a Mercury type at that )