Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 318Get this manual
17Align the bearing carrier 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 hOLls;na 19Fill the bearing carrier retainer nut threads and corresponding gear housing threads with Quicksilver Special Lubricant 101 (92-1 3872A 1)Start the retainer into the gear housing threads and screw it down fully by hand
aGear Case Alignment Hole"V" Shaped Notch in Bearing CarrierAlignment Tab of Tab Washer
aBearing Carrier Retainer
18Insure thai the shaped lab aligns with the 'V' notch in bearing carrier