2001 Mercury Mariner 50-60HP Factory Service Manual, Page 474Get this manual
BIGFOOT GEAR HOUSING
7If bearing is rusted or does not roll freely, replace bearingIf necessary, remove bearing and oil seals using Mandrel (91-36569) and Driver Rod (91-37323)Discard oil seals
NOTE: From Bearing Removal and Installation Kit (91-31229A7)