1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 325Get this manual
Power Trim System Removal Support outboard with tilt lock lever when servicing power trim system1Disconnect power trim harness from outboard wiring harness2Remove screw and clip securing wiring harness to clamp bracket3Remove trim gauge sender (if equipped)4Use suitable tool to remove upper headed cross pinRetain pinStraight pin is hard to remove (see item 5)
6Use suitable punch to remove lower cross pinRetain cross pin