2005+ Mercury Verado 4 Stroke 200/225/250/275 6 gear housing Service Manual, Page 128Get this manual
Left Hand Rotation 3Inspect the clutch jaws of the gear for damageThe surfaces must not be chipped or rounded offReplace both the reverse and pinion gear as set if any of these conditions exist aReverse gear teeth
bClutch jaws
4Inspect the propeller shaft tapered roller bearing on the inside of the reverse gear and
its respective bearing cupIf either the bearing or the bearing cup surface is pitted, grooved, scored, worn unevenly, discolored from overheating, or has embedded particlesremove and replace the tapered roller bearing assembly in the reverse gear as outlined in the next section
5Inspect the tapered roller bearing pressed onto the reverse gear and the bearing
surface on the reverse gear bearing cupIf either the roller bearing or the bearing surface of the reverse gear bearing cup is pitted, grooved, scored, worn unevenly, discolored from overheating, or has embedded particles, replace the reverse gear bearing cup and remove and replace the tapered roller bearings as outlined in the next section