Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 250Get this manual
5 Insert the drive shaft into the gear housing drive shaft boreIt may be necessary to rolale the drive shafllo engage the drive shaft splines inlo Ihe pinion gear splines Start the pinion nut onto the drive shaft threads by rotating the drive shaft until the nut is snugTorque the pinion nut to 70 lbft(95.0 Nm) by turning the drive shaft using the drive shaft nut wrench and torque wrench70891Pinion Gear (with the washer glued to it)Pinion Nut Adaptor (91-61067A2)Drive ShaftPinion Nul Adapter (91-61067A2)Drive Shaft Nut Wrench (91-56775)Bearing Carrier (installed backwards)