Tach not working

[BigAl331]

I need to get my tach working. Will an automotive tach work? How is it hooked up, on the power packs?

I have a Johnson 150, it's an '82.

 

[steplift20]

could be the rectifier

 

[BigAl331]

Where is it and how can I check it?

 

[phatdaddy]

every time i had a tach quit, it ended up being the charging system, good luck

 

[BigAl331]

I'm getting power to the guage. I still need to check the gray wire that goes from the guage to the ignition on the motor.

 

[Skools Out]

the tach comes from the rectifier and is connected to the gray wire on there. common on OMC stuff and no a car tach will not work. does that motor have oil injection if so don't run it as the oil injection is controlled by the tach output on the OMC stuff

 

[BigAl331]

Don't think its injected. I don't have an oil tank on the motor, straight mix.