Ok I have a continuous alarm as soon as key is turned on. I traced it down behind gauges to a plug with 3 pink wires pnk/Blk, pnk/gry, and just pink. they plug into a 2 wire plug 1 pink 1 blk. I disconnect it alarm goes off. So I think I traced it to fuel tank sender. If I unplug fuel sender with same 3 color wires and turn key to start no alarm. If I leave it plugged in turn key to start alarm goes. If I unplug it at tank alarm still sound until I turn key off and back on. Also If unplugged at tank fuel gauge does not work. If I unplug the one behind the gauges the fuel gauge still works no alarm. Question is does the tank have a low fuel alarm? I never heard of that before and nothing in my manual about it. Also everything I looked up on line says 1 steady beep is for low oil, overheat and rev limit nothing about fuel. If anyone has an idea I would appreciate it. Or a decent wire diagram of instrumentation my service manuals does not match my boat wiring. Please and thank you