Engine Guardian Strategy - MerCruiser Axius 350 MAG User Manual

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.
90-899883234 JANUARY 2008
Section 2 - Getting to Know Your Power Package
Page 33