1994 Mercury 175 Black Max-Tach Not Working

[NYLaguna2100]

Hello,<br /><br />I am trying to get my Tach to work. I thought it was just a bad tach and purchased a new one and still not working. On the old tach when I would remove the silver send wire and put it back on the tach would bounce a little bit around so that is why I thought it as bad. Someone told me to ensure I am receiving good voltage and the motor is charging normal at around 12 or so volts and rises just a bit when given more throtle. On the back of the tack, I have 2 purple wires going to the Ignition post, 2 ground wires, and a silver wire going to the Send post. I also checked that the tach is getting power. Any suggestions would be greatly appreciated. Is there another wire I can just splice off coming out of the wire harness?? Thanks

 

[Laddies]

Re: 1994 Mercury 175 Black Max-Tach Not Working

If yuou have power at the tach, the sender wire must not have a signal, ck the plug ins in the harness and change the wire to the other side of the rectifier, if nothing else try a jumper from the rectifier--Bob

 

[NYLaguna2100]

Re: 1994 Mercury 175 Black Max-Tach Not Working

Hi Bob,<br /><br />Thanks for the reply, I checked the signal was good on that grey send wire with a meter and it was showing current coming through. Any other suggestions, much appreciated. Chris

 

[Laddies]

Re: 1994 Mercury 175 Black Max-Tach Not Working

Have you the tach switch in the right position

 

[NYLaguna2100]

Re: 1994 Mercury 175 Black Max-Tach Not Working

Yes, switched the new tach in the position as the old one exactly.

 

[Laddies]

Re: 1994 Mercury 175 Black Max-Tach Not Working

Take some jumpers and hook the tach dirrectly to to the engine to see if it works then--Bob

 

[NYLaguna2100]

Re: 1994 Mercury 175 Black Max-Tach Not Working

I've verified that the tach is good and the send wire does have current going through it right up to the tach. Where do I go from here, someone told me it could be my rectifier, stator, or voltage regulator. My volt gauge is showing 12 volts and a bit one once the idle revs up, but I heard even if one of those components are bad, the volt gauge will still show charging. Not sure if this helps, but the send wire is a single grey wire. Does anyone know if this is the correct wire on there, I am assuming so, since I didn't remove any. Any additional help, much appreciated, Chris