2006 Merc 90ELPTO - tachometer issue

Bannister 6905

Petty Officer 2nd Class
Joined
Jun 5, 2015
Messages
110
I have a 2006 Merc 90ELPTO on a Tracker V18 with the factory tachometer that I purchased recently.
The issue I am having is with the tach. When I switch the key on, the tach zeroes. When I turn to start, it briefly registers a reading and then immediately goes to zero.
Increasing RPMs does not affect it - just keeps reading zero, but always initially shows a reading before starting.

Because of an apparent overheating issue with the regulator, I just replaced it with an OEM reg, and the result is the same.
The battery is charging properly and the engine runs very well.

I am leaning toward a bad tach, but am asking if anyone has had a similar issue and what the resolution was.

Thanks!

Bannister6905
 
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