Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 331Get this manual
Filling The Oil njection System With Oil Quicksilver 2-Cycle Outboard Oit is recommended for this oil inj ection system In emergency, when Quicksilve oil is not avai lable, substitute high quality 2cycle oil that is intended for outboard use and meets either BIA ratings TC-W, or TC-W 11'-, shown on oil containerBIA ratings TC-W or TC-W liTare the Boat-
Bleeding Air From Oil Injection Pump and Oil Injection Outlet Hose
BLEEDING AIR FROM OIL INJECTION PUMP
With engine not runn ing, place shop towel below the oi injection pumpLoosen bleed screw (a) three to four turn and allow oil to flow from bleed holeRetighten bleed screwThi procedure allows the pum to fill ith oil
ing Industry Association 's desig nation for approved2-cycle water-cooled outboard oils1Fill remote oil tank to th galmark with oilRetighten till cap2Remove fill cap from the engine reservoir tank (a) and fill the tank with oiL Retighten the 1111 cap3Loosen (12 turn) the eng ine reservoir tank fill capRun the engi ne unti airfrom inside the il inlet hose has been purged out of the reservoir and oil starts to flow out reservoir tankRetighten cap