Section 2 - Getting to Know Your Power Package
Page 32 90-864197084 NOVEMBER 2008
Audio Warning System
Your Mercury MerCruiser power package may be equipped with an Audio Warning System. The Audio Warning System will not
protect the engine from damage. It is designed to warn the operator that a problem has occurred.
The audio warning system will sound with a continuous horn:
• Engine oil pressure is too low
• Engine temperature is too hot
• Seawater pressure is too low
The audio warning system will sound with an intermittent beeping:
• The sterndrive oil level is too low
• Engine guardian activates
• A sensor failure is detected
• A communication failure within a CAN system occurs
NOTICE
A continuous horn indicates a critical fault. Operating the engine during a critical fault can damage components. If the warning
horn emits a continuous beep, do not operate the engine unless avoiding a hazardous situation.
If the alarm sounds, stop the engine immediately. Investigate the cause and correct it, if possible. If you cannot determine the
cause, contact your authorized Mercury MerCruiser dealer.
Testing The Audio Warning System
1. Turn the ignition switch to the "ON" position without cranking the engine.
2. Listen for the audio alarm. One short beep will sound for each engine upon key‑up, indicating the system is functioning
correctly.
Engine Guardian Strategy
IMPORTANT: Boat speed could be reduced to idle and may not respond to the throttle.
Engine Guardian Strategy is designed to help reduce the potential for engine damage by reducing engine power when a potential
problem is sensed by the ECM. Engine Guardian monitors:
• Oil pressure
• Coolant temperature
• Seawater pressure
• Engine overspeed
• Exhaust Manifold Temperature [8.1 liter (496 cid) engines only]
Also the Engine Guardian Strategy will reduce engine power to 90 percent of maximum if any sensor on the power package fails.
For example, if the water inlet becomes partially blocked, Engine Guardian Strategy will reduce the available power level of the
engine to help prevent damage from decreased water flow to the engine. If the debris passes through and full water flow is restored,
engine power levels are restored to normal.
To avoid a possible recurrence of the problem you should contact an authorized dealer. The ECM stores the fault and with this
information the technician will be able to more rapidly diagnose problems.
Axius Premier Features (If equipped)
Axius Premier Precision Pilot Trackpad Functions
The Axius Premier System is a fully integrated system utilizing a GPS sensor, a customer‑supplied NMEA‑0183–compatable
chart‑plotter, an inertial measurement unit (IMU), the electronic helm, Vessel View, joystick control, and the Axius Premier trackpad
provided with the system. No third‑party autopilot is necessary.
Axius Premier requires the following:
• A CAN based NMEA‑0183 information stream from the GPS unit
• A Mercury approved chartplotter
• An inertial measurement unit (IMU)
• The electronic helm
• VesselView
The Axius Premier Precision Pilot Trackpad gives the operator control over:
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