1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 160Get this manual

1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 160

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IMPORTANT: On some engines, BOTH the piston rod and rod cap bolt holes are threadedThe rod cap and rod must be aligned and held tight together when threading in boltCheck that mating surfaces are tigh