Mercury Mariner Outboards 2.2 / 2.5 / 3.0 Service Shop Manual, Page 56Get this manual
Gear Housing Removal
NOTE: Gear housing does NOT have to be removed from drive shaft housing to repair water pump
Propeller Removal
AWARNING
Before turning propeller or attempting to remove propeller, remove (and isolate) spark plug lead from spark plug to prevent engine from starting accidentally
AWARNING
To prevent accidental engine starting, remove (and isolate) spark plug lead from spark plug BEFORE removing gear housing from drive shaft housing
2Remove cotter pin (a), and pull propeller off from shaft (b) Remove shear pin (c)
Remove spark plug lead from spark plug Close fuel shutoff valve Tilt engine to fullUp" positionRemove bolts (a)and pull gear housing from drive shaft housing
Draining and Inspecting Gear Housing Lubricant