Mercury Mariner Outboard 225 3 Litre Service Manual 1994, Page 278Get this manual
BEARING CARRIER ASSEMBLYINSPECTION 1Clean the assembly and all components with suitable solvent and dry the parts thoroughly using compressed airNOTE: If any of the following items are found to be defective complete the appropriate instruction(s) in "Bearing Carrier Assembly", 'Component Disassembly and Inspection' section found on page 68-166
Inspect the outer hub of the forward gear for excessive wear or damageReplace the forward and the pinion gear if either of these conditions existInspect the clutch jaws of the gear for damageSurface must not be chipped or rounded offReplace the forward and the pinion gear if any are found
2Inspect the bearing carrier for signs of excessive corrosion especially in the area where the bearing carrier
touches the gear housingIf excessive corrosion is evident replace the carrier
aReverse Gear TeethClutch Jaws
Inspect the Ihrust bearings, collars and forward gear bearing adaptor for excessive wear in the areas where the thrust bearings come into contact with themReplace the appropriate components if they are found 10 be defectiveInspect the bearing carrier retainer for cracks andor broken or corroded threadsReplace it jf any are foundInspect the large D-ring for damage andor deteriorationReplace it if either condition is found