1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 266Get this manual

1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 266

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8 Install O-ring [2.739I (69.57mm) I.DIt is recommended O-ring be installed even if pump did not originally have O-ringInsert pump and motor assembly into Power Trim housing, with rocker arm positione