Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 285Get this manual
Propeller Shaft Assembly REMOVAL
A CAUTION
Hold onto the propeller shaft assembly in the following
Locate and retain the thrust race and thrust bearing which could be on top of the reverse gear (if not, they may be stuck to the reverse gear bearing adaptor)
step to avoid personal Injury andor dropping compo nents when turning the gear housing over1While holding onto the propeller shaft, turn the gear
housing over so that the bore opening is facing down2While moving the propeller shaft to the lett (port) side of the gear housing, to allow the shift spool to disengage from the shift crank, lower the propeller shaft oul of the gear housing