I have 1992 Smokercraft Pro Mag, with a 1992 Mariner 90HP two stroke oil injected engine. I bought the boat used about 2 years ago.
At first, the tachometer and the gas gauge were working fine. But, now neither one of them does anything whether the engine is running or not.
The tach does not "flatline", instead, it is reading somewhere in the middle of the dial regardless of whether the engine is running - or if the key is even in the ignition.
Do you have any idea how to fix this?
Are the two gauges on the same wiring or the same fuse or circuit? I have not tried to do anything to fix them yet, but it is becoming a real pain to operate the boat without a gas gauge, always guessing at how much is in the tank.
Thanks for any assistance you can provide.
Both of the gauges are powered by the same wire.
- Power for the gauges will come from the purple wire.
- Ground for the gauges will come from the black wire.
- The source of the purple wire is the key switch.
- The dash will have a common ground.
This should be easy to fix,