Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 84Get this manual
Carburetor Removal Carburetor Removal From Engine
1Remove fuel connector and air box cover
3Disconnect fuel line from fuel pump
aFuel Une
bFuel Pump
4Remove ca rburetors and linkage from engine as an assembly
aFuel Connector
bAir Box Cover