1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 253Get this manual
Tilt Ram REMOVAL 1Remove Power Trim assembly from engine, refer to "Removal" instructions in "Power Trim Assembly Removal and Installation," precedingSlowly remove fill screw to bleed pressure from reservoirFrom full closed (clockwise) position, slowly open manual release valve to turns (counterclockwise) to bleed remaining pressure from Power Trim systemRemove pin by driving pin in direction shown