Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 283Get this manual
IMPORTANT: The pinion bearing rollers are free to fall out of the pinion bearing once the drive shaft is removedBe careful not to lose the (18) rollers5Remove the drive shaft and all components by pulling the drive shaft straight out of the gear housing as shownForm small hook on stiff piece of wire and attempt to hook onto the top side of the gear and pull it outIt may be necessary to slightly move the propeller shaft from side to-side to dislodge the pinion gear aPropeller ShaftPinion Gear Wire Tool
aDrive ShaftDrive Shaft RetainerBearing Cup, Bearing, and Shims