1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 297Get this manual
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MOTOR AND PUMP REPLACEMENT IMPORTANT: The pump is not rebuildableIf pump is defective, replace as an assembly 3 Remove two screws to remove pump
51433 MotorScrew (2)Driveshaft