2005 42 Executioner
 

Help! What a great boat this has been with moderate freshwater usage and meticulous care, but now my gas gauge on one side doesn't work. Stays on empty. I jumped the pink wire to ground on the dash gauge and got full scale so it looks like its the sender. Got to the sender and it says, line by line:

FULL 1/05 EMPTY
Fountain 7827B cgf-12.5-ws-
12v-gaf/mercsg-3w-isol-precal-5h
blk=Neg wht=Send red=Pos

What does this mean and where can I get one?

Thank you, On Time