1996 Mercury Force 25 HP Service Manual 90-830894 895, Page 84Get this manual
BEARINGS (CONTINUED)
Inspect gear housing for bearing races that have spun in their respective boresIf race(s) have spun, gear housing must be replaced Roller bearing condition is determined by inspecting the surface of the shaft that the roller bearing supportsCheck shaft surface for pitting scoring, grooving, imbedded particles, uneven wear andor discoloration from overheatingThe shaft and bearing must be replaced if such condition existsSEALS