I have a 2003 Searay 290 Amberjack with what looks like the same system you had. The only thing not working is the starboard gas gauge. I put a new fuel sending unit into my tank but the smartcraft is still not recognizing it. My mechanic says the fuel sending unit is functioning correctly...
I have a 2003 Amberjack 290 with the 350 Mags and V-drives. Late last fall, my starboard fuel gauge (analog) stopped reading the fuel level. I ordered a new fuel tank sending unit and had it installed only to find out that there is an issue with the SmartCraft unit not reading the fuel level...