Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 11Get this manual
Filling Oil Injection System Quicksilver 2-Cycle Outboard Oil is recommended for this oil injection systemIf Quicksilver oil is not avaitable, substitute high quality 2-cycle oil that is intended for outboard use and meets BIA ratings TC-W II or TC-W 1IITh!1Fill remote oil tank 10 the galmark with oilRetighten
For better accelerationsuch as is needed in water ski ing, propping up to 500 RPM above the recommended range is advised CONTINUOUS operation above the recommended maximum RPMhowever, is NOT advised
fill cap2Remove fill cap from the engine reservoir tank and fill the tank with oilRetighten the fill cap3Loosen (12 turn) the engine reservoir tank fill capRun the engine until air from inside the oil inlet hose has been purged out of the reservoir and oil starts to flow out of reservoir tankRetighten the fill cap
4After initial propeller installationthe following conditions may require that the propeller be changed to lower pitch: abcWarmer weather and high humidity wi( cause an RPM lossOperating in higher elevation will cause an RPM lossOperating with an increased load (additional passengersequipment, pulling skiers, etc