1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 255Get this manual
7Insert shaft into housing, as shown 51342
Tap shaft into housing until shaft is positioned as shown51353Shop ClothSolid Work Bench (or Floor)Air Nozzle
CLEANING AND INSPECTION Inspect O-rings, and replace if damagedClean components with parts cleaner and dry with compressed airInspect tilt rodIf scraper (located in cap) has failed to keep rod clean, replace scraper; refer to instructions, following51365
SCRAPER REPLACEMENT Use screwdriver to remove components from cap