Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 313Get this manual
10Remove the bearing carrier, pinion nut adaptor and drive shaft nut wrench11 Torque the retainerto 100 lbft(135.5 Nm) Bearing Carrier Assembly
Final Installation
1Install the appropriate spacer shim into the gear housing
70711Drive Shaft Bearing Retainer Wrench (9t-43506)