1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 151Get this manual

1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 151

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Connecting Rods If necessary, clean connecting rod surfaces as follows: Attach end caps to connecting rodsFollowing these directions, tighten rod cap attaching bolts to specificationsRecheck alignment