2001 Mercury Mariner 50-60HP Factory Service Manual, Page 337Get this manual
POWER TRIM
Hydraulic System Troubleshooting Flow Chart
TRIM SYSTEM LEAKS DOWN WITH MANUAL RELEASE VALVE CLOSED
Manual release valve and O-ring damaged
Inspect manual release valve
Manual release valve and Orings appear to be O.K- Clean and reinstall manual release valve
Replace manual release valve and O-rings
Trim system down
leaks Trim system does not leak downTesting complete
Trim system does not leak downTesting completeDebris andor damage identified
Remove tilt relief valving and inspect O-rings and seals for debris andor damageTilt relief valving and O-rings appear to be O.K- Clean and reinstall tilt relief valveing