1997+ Mercury 35/40HP 2 Cylinder Outboards Service Manual PN 90-826148R2, Page 243Get this manual
Hydraulic System Troubleshooting Flow Chart OUTBOARD WILL NOT HOLD TILTED POSITION DURING REVERSE ANDOR TRAILS OUT DURING HIGH SPEED DECELERATION
Manual release valve and O-ring damaged
Inspect manual release valve
Manual release valve and O-rings appear to be O.KClean and reinstall manual release valve
Replace manual release valve and O-rings
Trim will not hold reverse thrust
Trim system holds reverse thrust: Testing complete
Trim system holds reverse thrust: Testing complete Debris andor shock ball hang up identified
Remove and inspect piston rod assembly for debris andor shock ball hang up
Shock piston appears O.K- Clean and reinstall piston rod assembly