1989 sea ray 4.3 liter where does heavy gauge green wire go to from gas tank?

[merls bait shop]

heavy gauge green wire from gas tank, i recently rebuilt motor, first timer. i think green wire is a ground, but gas gauge not reading? also motor seems to run great ,but stalls out after running in driveway for like 20 mins or so ? tried adjusting carb, help !!!!

 

[Bt Doctur]

green wires throughout a boat are usually bonding wires. Every underwater fixture is bonded together to prevent electrolsys.
For the gas gauge, locate the sender at the tank, jump the pink and black together , and with key on gauge should read full.If yes. sender is bad .If no, wiring/gauge is bad.
Have you replaced the fuel filters?

 

[Alumarine]

Normally there's 2 wires at the fuel tank.
One goes to the gauge and the other goes to ground.

Does it start up after it stalls out?

 

[merls bait shop]

it doesnt start up right away after it stalls, i cleaned the fuel filter, had some sediment in it, stil stalls at idle after it warms up, also i cant get the timing at 8 degrees btdc.with out it stalling. i can get it to about 12 degrees btdc then it staqlls. if the oil pressure unit is bad will it cause this ? ty