1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 241Get this manual
Power Trim Assembly Removal and Installation Removal
1Remove clamps on transom bracket to free power trim wiring
WARNING
Failure to support outboard as shown could result in personal injury andor damage to outboard or boat
aHarness RetainerClampSta-Strap(s)
20319Tilt Lock Lever
2Raise outboard to full "Up" position and engage tilt lock lever