Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 319Get this manual
21Bend one tab aft (outward) into space between two of the notches of the retainerBend all the remaining tabs forward (inward) Water Pump Assembly
Installation
NOTE: The gasketsface plate hole pattern is not symmetricalIf the holes of the gasketsface plate do not align with the screw holes of the gear case andor each other, one or more of the parts is upside downDetermine which part(s) is (are) upside down and turn the appropriate part(s) over
1Reinstall filler block in housing, if removed 2Install the small hole gasket then the face plate followed by the large hole gasket onto the gear case
Bearing Carrier Tab Retainer Notches Alignment Tabs (Bend Inward)