Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 282Get this manual
Drive Shaft Assembly REMOVAL
1Remove the drive shaft pinion nut as followsaPlace the dri ve shaft bearing retainer wrench onlo the drive shaftDo not loosen the retainer at this timeInsert the pinion nut adapter, with the MR slot fac ing the pinion gear, into the gear housing It may be necessary to slightly lift and rotate the drive
If the drive shaft is broken, place propeller shah nut wrench onto the propeller shaft splines, hold shift shaft in forward gear and loosen, (but do not fully unscrew)the pinion nut by rotating prop shaft counterclockwise to turn gears, thus loosening the pinion nut
NOTEThe propeller shaft nut wrench is included with the pinion nut adapter kitshaft to align the pinion gear nut into the pinion nut
adapter slotInstall the bearing carrier into the gear housing