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Tachometer

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fazer

New member
If I have a known good Tachometer gauge and power from the ign wire and the signal wire but doesnt work when connected and installed what else could be going on?
 
Does it have a good ground on the gauge?

The signal wire will not be a steady voltage, it see's pulses of voltage. Can you get a loaner hand held Tach from a local auto parts store
 
AllDodge said:
Does it have a good ground on the gauge?

The signal wire will not be a steady voltage, it see's pulses of voltage. Can you get a loaner hand held Tach from a local auto parts
Click to expand...

Thats correct I had variable voltage readings from the signal wire with increase in engine speed. I will look into the handheld
 
AllDodge said:
Does it have a good ground on the gauge?

The signal wire will not be a steady voltage, it see's pulses of voltage. Can you get a loaner hand held Tach from a local auto parts store
Click to expand...
A Tiny Tach would be my suggestion. They are inexpensive, have a stick on piece of reflective tape for the rotating element, and a hand held Infrared output signal you aim at the tape and it gives you a digital answer. There is a brand of TT that has a wire you wrap around one of the spark plug wires for the comparison.....They may take 2 persons to accomplish the comparison...one at the Helm steering the boat and one taking the measurement.
 
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