1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 243Get this manual
6Remove screws and washers and move starboard transom bracket so that manual release valve will clear bracket when power trim is removed Installation
1Paint any exposed metal surfaces to prevent corrosion2Apply Loctite 271 to screwsInstall trim system, starboard transom bracket, and tilt tube nut
51375Screw (6) Torque to 45 lbft(61.0 Nm)Flatwasher (6) Install one per screw
aScrews (3)Washers (3)Manual Release Valve