Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 199Get this manual

Mercury Mariner V-250 V-275 Outboard Service Shop Manual 1990, Page 199

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CLEANING AND INSPECTION
2 Inspect gear teeth for pittinggrooves, scoringuneven wear and for discoloration (from overheating)Replace gear if any of these conditions are fou nd3 Check clutch jaws