I need some help wiring up a tach

1980Galaxy

Petty Officer 1st Class
Joined
Apr 11, 2009
Messages
339
I bought a tach for my 2011 Lowe Skorpion with a Mercury 60/40 jet outboard.

I was under the impression that i hook up a gray wire to (SEND) on the gauge but I don't have a solid gray wire behind the dash (I only see one gray/blue, and one gray/green).

I think I have the ignition wire (orange), but I need some help... Thank you.
 
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