Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 378Get this manual
10Torque the retainer to 100 lbft(135.5 Nm) 2Pull up on the drive shaft and tighten the two (2) allen screws in the top nut of the bearing preload tool
70711Drive Shaft Bearing Retainer Wrench (91-43506) 70716Allen Screws
11Remove the bearing carrier, pinion nut adapter and drive shaft nut wrench
Gear LocationBacklashes Checking and Adjustment
Drive ShaftBearing Preload Tool