1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 275Get this manual
Striker Plate Replacement Visually inspect striker plates (a) and replace if worn excessively
Trim Indicator Gauge
A Quicksilver Trim Indicator Gauge accessory kit is available for the power trim sender (if not previously installed)
Fill, Check, and PurgePower Trim System
IMPORTANT: This trim system is pressurizedRemove "Fill" plug only when outboard is tilted to the full "Up" position or the trimtilt rams are fully extendedRetighten "Fill" plug before tilting outboard down or retracting tilttrim ramsRemove "Fill" plug and O-ringSystem is full when oil level is present at fill holeTighten "Fill" plug securely27930Striker Plate (2)LockwasherLocknutTorque to 80 lbin(9.0 Nm)