1991 Johnson/Evinrude Models "EI" 40 thru 55 Service Manual, Page 200Get this manual
Disassembly
1Remove the propeller and mounting hardwareInspect the propeller for spun hubf412Drain the gearcase by first removing the oil level plugthen the oil filldrain plug Inspect the lubricant for water which will give it milky appearance, or overheating which will give the lubricant black color and burned odor3Remove the two anode retaining screws1sl4the two propeller shaft bearing housing screws and retamers