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4 - O
PERATION
28
90-8M0077672 JUNE 2013
I
NSTRUMENTATION
It is important to monitor critical engine and boat functions while the
boat is in operation.
Mercury Racing requires that the following critical engine functions
be monitored:
•
Oil pressure
•
Engine RPM
•
Oil temperature
•
Water temperature
•
System voltage
•
Guardian fault messages
W
ARNING
S
YSTEM
The engine's warning system includes an audible alert consisting of
a horn located in the helm harness, and the Engine Guardian
system. Do not attempt to alter or disable the warning system in any
way.
E
NGINE
G
UARDIAN
S
YSTEM
The Engine Guardian system monitors sensors on the engine for
early indications of problems. If a sensor indicates a fault, the
system responds to the problem by sounding the horn and,
depending on the type of fault, may reduce engine power to provide
engine protection. Refer to the VesselView manual to display the
details. When the key switch is turned "ON," the warning horn beeps
once to verify horn operation.
F
AULT
T
YPE
AND
R
ELATED
W
ARNING
S
IGNAL
If there are two stages for a warning fault, Stage 1 occurs first. If a
fault remains active, Stage 2 becomes active. If multiple faults are
active, the operator is warned of the more severe fault first. If
another fault with the same severity occurs during Stage 2, the horn
will return to Stage 1 signaling. Monitor the VesselView for warning
messages.
•
Caution: 1 second on and 1 second off for 6 cycles
•
OBD‑M Stage 1: 5 seconds on 1 cycle followed by 60
seconds off.
•
OBD‑M Stage 2: 0.5 seconds on and 0.5 seconds off for 1
cycle followed by 60 seconds off.
•
Severe Stage 1: 6 seconds on and 6 seconds off for 2 cycles
followed by 59 seconds off.
•
Severe Stage 2: 0.5 seconds on and 0.5 seconds off for 2
cycles followed by 59 seconds off.
•
To stop the warning horn, turn off the engine. If the horn
continues to sound on restart, the system detected a fault
again. See your Mercury Marine dealer to correct the problem
as soon as possible.
•
If the beeping does not reoccur, the problem does not need
immediate attention but will require you to see your authorized
Mercury Marine dealer to diagnose and clear the fault.
If the propulsion control module (PCM) detects a fault signal from an
engine sensor, it records a fault code. A computer diagnostic system
(CDS) is required to extract specific problem codes from the PCM.