1990 Johnson Evinrude "ES" Cross V 88 thru 115, 150 thru 175, P/N 507874, Page 254Get this manual
Gearcase Servicing150 Counter-Rotation Removal Remove the gearcase as described on Page 6-10Disassembly 1Remove the propeller and mounting hardwareInspect the propeller for spun hub2Drain the gearcase by first removing the oil level plugLJ then the oil filiidrain plug You will find magnet attached to one of the plugsInspect the magnets for the presence of metal chipsIf you do find chips on the magnets, they must be steel and must have come from one of the gears, bearings, or shafts within the gearcase, so make note for future reference while inspecting the internal componentsThe plug with the magnet must be installed in its original positionAlso, inspect the lubricant for water or burned odorWater in the lubricant will give it milky appearanceOverheating will give the lubricant black color and burned odorCOA3L4B