Fuel gauge

[Pipe Dream]

Hello our 2003 upper helm fuel gauge doesn’t work , I’m looking to buy and install a new gauge , I’m told it has to be compatible with the sending unit. The lower gauge is working, this is all original can someone give me info on the sending unit thank you

 

[High Wire]

What brand is the gauge?

 

[Pau Hana]

Swap the gauges (top to bottoma dn vice versa) to confirm if its the sender or the gauge.