1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 339Get this manual
7Using suitable mallet, drive upper pivot pin into swivel bracket and through trim ram until pivot pin is flush with swivel bracket 8Drive upper retaining pin in until seated
51505Retaining Pin 51515Pivot PinSwivel BracketTrim Ram
9Recheck fluid level10Power trim may now be operated to lower outboard to desired positionTrim system is self purging11Reconnect power trim leads to relays under ignition cover12Reinstall spark plug leads to spark plugs13Reinstall cowls14Connect battery leads to battery terminals