Motor swap. Merc 140 now tach not working

m*a*baity

m*a*baity

Cadet
Joined
Apr 5, 2009
Messages
26
I have an 81 Caravelle. Blew a head gasket so I got another motor from an 86 Starcraft. Both are Merc 140's. Got them swapped out and all is well minus some fine tuning. My tach isn't working now. I have 2 wires I haven't hooked up yet. I think those are my trim gauge wires they are black and orange/white. Am I wrong or right? Where are some good places to start checking? The tach worked before. Any suggestions? Thanks fellas. :confused:
 
Bt Doctur

Bt Doctur

Supreme Mariner
Joined
Aug 29, 2004
Messages
19,111
Re: Motor swap. Merc 140 now tach not working

The tach feed is usually a grey wire connected to the neg. side of the coil
 
m*a*baity

m*a*baity

Cadet
Joined
Apr 5, 2009
Messages
26
Re: Motor swap. Merc 140 now tach not working

What about the Orange/white. Is that the trim gauge wire?
 
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