Mercury 45 Service Manual

POWER TRIM
90-828631R3 MARCH 1999 Page 5C-25
Hydraulic System Troubleshooting Flow Chart
TRIM SYSTEM LEAKS DOWN
WITH MANUAL RELEASE VALVE
CLOSED.
Inspect manual release valve.
Manual release valve
and O-ring damaged.
Replace manual re-
lease valve and
O-rings.
Trim system does
not leak down. Test-
ing complete.
Trim system leaks
down.
Manual release valve and O-
rings appear to be O.K. - Clean
and reinstall manual release
valve.
Trim system does
not leak down. Test-
ing complete.
Remove tilt relief valving
and inspect O-rings and
seals for debris and/or
damage.
Debris and/or dam-
age identified.
Replace tilt relief valving.
Trim system does
not leak down. Test-
ing complete.
Trim system leaks
down.
Tilt relief valving and O-rings
appear to be O.K. - Clean and
reinstall tilt relief valving.
Trim system does
not leak down. Test-
ing complete.
Remove PO check valve
assembly, inspect O-
rings and seals for dam-
age.
Debris and/or dam-
age identified.
Replace PO check
valve assembly.
PO check valve appears
O.K. - Clean and reinstall
PO check valve assem-
bly.
continued on next page
Trim system leaks down.
Trim system does
not leak down.
Testing complete.
Trim system does
not leak down. Test-
ing complete.

Mercury 45 Specifications

General

Horsepower	45 HP
Cylinders	3
Starting	Electric
Full Throttle RPM Range	5000-6000 RPM
Steering	Remote
Exhaust	Through Prop
Shaft Length	20 in