Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 161Get this manual

Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 161

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7 Remove the crankcase coverMeasure the compressed plastigauge to check the main bearing clearanceReplace bearings if clearance is not in specification Checking Connecting Rod Bearing Clearance

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