Mercury--Tach Wire in 8-Pin connector??

frustratedboater

Chief Petty Officer
Joined
Jul 10, 2007
Messages
413
I have upgraded from a 1994 115hp, 4-cyl to an 2005 Opti, DFI, 150hp and my tach is not working. I was wondering if there is a wire in the connector already or is there a separate wire that I would need to run? I am not sure how to test at the gauge to see if that is the issue.
 
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