Tachometer Install on Mercury Classic 50

Kevin60181

Seaman Apprentice
Joined
Jun 30, 2012
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Not sure of the year.... Mercury Classic Fifty (50) 45HP
Serial Number A950272 Was told 1984, others say 1986 or 87??
Installing a Tachometer on a 1985 Bass Tracker V-17.
I know the red wires are positive, Black Negative. So I'm good there.
Where on the engine do I attach the signal wire (Green wire in the picture coming from the Tach)
Switch on the rear I'm assuming is for cylinder's 8 - 6 - 4.
Set mine to 4, knowing this is a 4 cylinder engine.
 
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