Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 359Get this manual
13Install the thrust washer and new ball bearing onto the reverse gearPress on the inner race of the ball bearing using the pilot washer until the bearing bottoms out on the gear 15Press the bearing carrier onto the reverse gear and bearing until the bearing bottoms out in bearing carrier, using the pilot washer to press against the carriera
23346 Pilot Washer (PIN 91-36571) Ball Bearing Thrust Hub Reverse GearPilot Washer (91-36571)Bearing CarrierReverse Gear and Bearing Assembly