Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 244Get this manual
To remove upper tapered bearing, position drive shah in viseDO NOT tighten vise jaws against drive shahStrike crankshah end of drive shah with lead hammer to remove upper tapered bearing Be careful not to drop drive shaft as bearing is removed
IMPORTANT: Discard drive shaft needle bearing after removal(Bearing cannot be re-used
aDriver Rod(9137323)Pilot (9-92790)Mandrel (9192789) 'From Bearing Removal and Installation Kit (91 -31299A5)
CLEANING AND INSPECTION
1Clean drive shaft, tapered bearing and race, and pinion