Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 51Get this manual
Oil Injection System Filling
1Fill remote oil tank with the recommended oil listed in the Operation and Maintenance ManualTighten fill cap
T? prevent damage to the fuel pumps, fill the engme fuel system with fuelOtherwise the fuel pumps will run without fuel during the priming processPrime the oil injection pump as follows: 1Fill the engine fuel system with fuelConnect fuel hose and squeeze primer bulb until it fells firm2Turn the ignition key switch to the "ON" positionOFF
aFill Cap
2Remove cap and fill engine oil tank with oilReinstall the fill cap
3Within the first 10 seconds after the key switch has been turned on, move the remote control handle from neutral into forward gear to timesThis will automatically start the priming process