3 prong female plug on Merc control boxes? What is it?

outboardnut

Petty Officer 1st Class
Joined
Oct 27, 2006
Messages
323
Anyone know what all this thing is supposed to do?

I thought it was an accessory plug.....to hook up a tach or something.

Ran across a motor that would not run if it had the jumper wire removed from it....

What exactly is this thing and it's function?
Found on nearly all the merc controls boxes from the late 60's all through the 70s...
 

Laddies

Banned
Joined
Sep 10, 2004
Messages
12,218
Re: 3 prong female plug on Merc control boxes? What is it?

It's a tach plug there are 1 +, 1 - and a signal terminal in it.
 
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