Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 306Get this manual
8 Install the bearing carrier over the propeller shaft pushing bearing carrier down until it is fully seated
10Insure that the "V" shaped tab aligns with the uV" notch in bearing carrier
aTab Washer'V" TabPropeller ShaftBearing Carrier
9Align the bearing carrier uV" shaped notch with the alignment hole in the gear housing Install the tab washer with the external tab inserted into the hole in the gear housing