RPM Tachometer question

[mjohnson]

I have a older Tach that is not registering any tach RPMS other then 0. Im getting power to the unit but the engine RPM is not changing other then 0.. Could it be just the counter on the flywheel or do you think I have to replace the whole tach? Thanks for the help

Mike

[boatmangc]

What motor?
What tach, digital/analog?

[99yam40]

see if this gives you some info on troubleshooting your tach.
http://faria-instruments.com/site_ma...achometers.pdf