2001 Mercury Mariner 50-60HP Factory Service Manual, Page 500Get this manual
BIGFOOT GEAR HOUSING
3Install bearingsleeve into housingIMPORTANT: Oil sleeve must be installed prior to upper driveshaft bearing installationIMPORTANT: Lower driveshaft bearing cup pilots the mandrel (13780) during installation of the upper driveshaft bearingsleeveLower bearing cup must be installed prior to installing upper bearingsleeve