Mercury Mariner 4, 5 102CC Sail 1990 Outboard Service Shop Manual, Page 169Get this manual
4Remove integ ral fuel tank from engine and drainRefer to Sect ion 3AFuel System" in Service Manual5Remove fuel hose from fuel cock6Loosen screw and pull fuel coc from integral fuel tank 8Install fuel ose assembly to tankSecure in place with sta-strap
a Fuel Hose AssemblySta-Slrap Screw Fuel Cock
9Install fuel tank and fuel hose assembly to engineRefer to Section 3AFuel System 10Insert petcock lever th roug engine cowlingSecure petcock to cowling with supplied screws