It's for the tach.... but the 12v lead out of it might be switched. Check it
with a meter - it may do.

-W

"Tom Creech" wrote in message
...
I have a 1979 Mercury 70 hp outboard. I need 12v power to power a
trim/tilt
gauge, so I need it to be hot only when engine is on. What's the easiest
way to do this? There is a rubber plug on the front of the control box
that
has three slots ( looks like a small plug outlet).
Is this possibly 12v out of the control ? If so, is there a plug
available
to fit this?

Thanks,

Tom Creech