Electric Tach Accuracy

[skyman51]

I have a period Sun Tach in my 1963 Dodge. It is definitely not indicating accurately. How do I go about checking it, and what may be the fix?

 

[sicksatellite]

check it with a timing light with built in tach. i think u can adjust the gauge on the back of it with it taken apart...i think there's a mini dial...not sure about the model of tach u got though...

 

[696pack]

Have you added an electronic ignition to this 1963? If so, you need another part (adapter) in order for your old tach to work correctly.

 

[Cranky]

The tach should have settings for different cylinder engines....is it set correctly?

 

[Meep-Meep]

If the tach is really old it may not be adjustable.