1986 Mercury control box tachometer plug

Doorknocker1

Cadet
Joined
Oct 18, 2020
Messages
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I’m trying to plug the tachometer wiring harness into the front of my mercury control box. The plug is D shaped. What is the proper position of the D plug when inserting into the control box. I’m having a hard time getting it to line up and I’m afraid I’ll damage the pins inside the box if I force it. Thank you in advance.
 
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