Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 280Get this manual
4 Press the needle bearing into the bearing carrier until the driver bottoms out on the bearing carrierEnsure that the numbered side of the needle bearing faces the seal end (aft end) of the carrierPress on the oil seal driver until the driver bottoms onto the aft face of the bearing carrier
aNeedle BearingBearing Carrier
c Needle Bearing Driver (91-15755)
aOil SealOil Seal Dfiver (9 1311 08) (long end)Bearing Carrier