1995 Mariner Mercury Outboards Service Manual 50HP 4-Stroke, Page 192Get this manual
Hydraulic System Troubleshooting Flow Chart Outboard will not hold tilted position during reverse andor trails out during high speed deceleration
Manual release 1 Inspect manual release valve valve and O-ring damaged
Manual release valve ana O-rings appear to be O.K- Clean and reinstall manual release valve
Replace manual release valve and rings
Trim will not hold reverse thrust
Trim system holds reverse thrust: Testina complete
1Trim system holds reverse thrust: Testina complete Debris andor shock ball hang up identified
Remove and inspect piston rod assembly for debris andor shock ball hang up
Trim will not hold reverse thrust
Shock piston appears O.K- Clean and reinstall piston rod assembly