Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 268Get this manual
Removal, Disassembly, Cleaning and Inspection Counter Rotation REMOVAL
Mark gear housing and trim tab so that trim tab can be reinstalled in the same positionRemove plastic cap at rear edge of drive shaft housing, then unthread bolt that secures trim tab and remove trim tab from gear housing Once trim tab is removedremove bolt from inside of trim tab cavity
Disconnect high tension leads from spark plugs and remove spark plugs from engine before removing gear housing from drive shaft housing1Disconnect high tension leads from spark plugs and remove spark plugs from engine
Shift engine into neutral positionTill engine to full up position and engage tilt lock leverBend labs of propeller tab washer away from thrust hub (rear)then remove propeller locknut, tab washer, thrust hub (rear), propeller and thrust hub (forward) from propeller shaft