Mercury Mariner 200, 225 Optimax Outboards Service Manual, 90-855348, Page 467Get this manual
10Install the bearing carrier assembly into the gear housing 12Insure that the "V" shaped tab aligns with the "V" notch in bearing carrier70714Tab Washer"V" Tab
50826Bearing Carrier Assembly
11Align the bearing carrier "V" shaped notch with the alignment hole in the gear housing and then install the tab washer with the external tab inserted into the hole in the gear housing
13Fill the bearing carrier retainer nut threads and corresponding gear housing threads (360) with 2-4-C wTeflon (92-825407 12)Start the retainer into the gear housing threads and screw it down fully by hand