Tach ?'s

SS MAYFLOAT

Admiral
Joined
May 17, 2001
Messages
6,372
On my flybridge helm, my tach is so old the face of the dial is all rusted. It still works, but is very ugly. I have a couple of parts boats and thought I would just switch out the tach with one of those.

I pulled the one out and find that I have 4 wires going to it. The new one and others I have dealt with have only one going to the distributor.

Since I have dual helms, does it need a different type tach? I don't want to experiment and blow out my module on my electronic ignition.

The boat originally had a dual points distributor and I switched it to a Mecrusier electronic ignition.

I know 2 wires will be the instrument light. Then there are 3 wires that go inside the case through a grommet. One of those wires coming out of the grommet is terminated to a grounding screw on the tack. Its the other 2 wires that has me confused. I'm not sure if it is daisy chained through my upper helm to my lower helm.

Any help is appreciated......Thanks...SS
 

SS MAYFLOAT

Admiral
Joined
May 17, 2001
Messages
6,372
Re: Tach ?'s

Don S, TD, Silvertip, Bondo, any ideas? I'll post a pic of the old tach if that will help. Thanks.
 
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