02 510 with Cummins QSM. 3 fuel...

[Flynlyon]

02 510 with Cummins QSM.  3 fuel tanks.  Starboard stopped working,  switched with the port. Its a bad gauge.   The gauge is a 4 in 1,  volts, oil, fuel and temp.  Any idea if I can replace or instrument shop to repair..

Thanks 

[Bow_Tie]

Try FP Marine, sometimes the gauge is listed there, also, try Great Lakes Skipper. That gauge has occasionally been listed on EBay.

[Slow_Ride]

Sounds like it might be a Keysor Medalion gauge. I had to replace them on my 02 560 because the Keysor Medallion module died and they can no longer make the module.
Does it look like this (I still have the old gauges)