Mercury Zeus 3000 Series, User Manual

Page: 79 / 160

Section 3 - On the Water
90-866938081 MAY 2009 Page 71
!
CAUTION
A fault in the steering control valve or trim control valve will temporarily cause a
malfunction of the steering or trim helm controls on the affected drive. If you lose normal
steering or trim control, reduce speed to operate the boat safely.
The table provides a matrix of related drive and trim tab information in the event of a
malfunction or failure.
Failure
Mode
Fault Codes
Drive or
Tab
Position
Engine Management Boat Speed
Steering
control
valve
stuck
Steering_Spool_Stuck_Fault
Stuck in
any
position
• Fault code is
seen on
VesselView
• Drive is in
reduced
operation mode
• Engine throttle
percentage is
reduced
The maximum boat speed that
can be achieved on a single
engine, with one engine shut
down, or with one drive that is not
steerable, will vary on different
models. Except in an
emergency, normal operation on
a single engine should not exceed
50% throttle.
Trim tab
control
valve
stuck
Tab_Spool_Stuck_Fault
Stuck in
any
position
No effect on engine
management
Proceed at a reduced safe
operating speed within the duty
cycle.
In an emergency, if a steering or trim control valve is stuck, it may be possible to clear the
steering fault code by manually overriding the system. A decal with information about the
location of specific control valves is affixed to the drive cover (if equipped) and on the
bracket attached to the steering manifold on all models. Refer to the
Procedure for a Stuck
Steering Control Valve
or the
Procedure for a Stuck Trim Tab Control Valve
for
additional information.
b
41303
a
a - Decal
b - Hydraulic manifold for steering and trim