Mercury 40 FourStroke User Manual

POWER TRIM
90-857046R1 NOVEMBER 2001 Page 5B-23
Hydraulic System Troubleshooting Flow Chart
OUTBOARD WILL NOT HOLD TILTED
POSITION DURING REVERSE AND/OR
TRAILS OUT DURING HIGH SPEED
DECELERATION.
Inspect manual release valve.
Manual release
valve and O-ring
damaged.
Manual release valve and
O-rings appear to be O.K. -
Clean and reinstall manual
release valve.
Trim system holds re-
verse thrust. Testing
complete.
Trim will not hold
reverse thrust.
Replace manual re-
lease valve and O-rings.
Trim system holds re-
verse thrust. Testing
complete.
Remove and inspect pis-
ton rod assembly for de-
bris and/or shock ball
hang up.
Shock piston appears
O.K. - Clean and reinstall
piston rod assembly.
Trim system holds re-
verse thrust. Testing
complete.
Debris and/or shock
ball hang up identi-
fied.
Replace piston
rod assembly.
Trim system holds re-
verse thrust. Testing
complete.
Trim will not hold
reverse thrust.
Remove PO check valve
assembly, inspect O-rings
and seals for damage.
Debris and/or dam-
age identified.
Replace PO check
valve assembly.
Trim system holds re-
verse thrust. Testing
complete.
PO check valve appears
O.K. - Clean and reinstall
PO check valve assem-
bly.
Trim will not hold
reverse thrust.
Trim system holds
reverse thrust. Test-
ing complete.
continued on next page

Mercury 40 FourStroke Specifications

General

Brand	Mercury
Model	40 FourStroke
Category	Outboard Motor
Language	English