Mercury 40 4-Stroke Manual page 33

FEATURES & CONTROLS
1. Continuous six second beep: Indicates a critical engine condition. Depending on the condition,
the Engine Guardian System may engage and protect the engine by limiting it's power. You should
return to port immediately and contact your servicing dealer.
2. Intermittent short beeps for six seconds: Indicates a non-critical engine condition. This condition
does not require immediate attention. You may continue using your boat, however, depending on
the nature of the problem, the engine's power may be limited by the Engine Guardian System
(see Engine Guardian System following) to protect the engine. You should contact your servicing
dealer at your earliest convenience.
It is important to note that in either of the above scenarios, the horn will only sound one time. If you key
the engine off and re-start it, the horn will sound again, one time, if the fault is still present. For visual
display of the specific engine functions and additional engine data, refer to SmartCraft Product
information, following.
The operator is able to correct a couple engine problems indicated by the warning horn. These conditions
are as follows:
• Cooling system (water pressure or engine temperature) problem. The warning horn will sound
Intermittent short beeps for six seconds. Stop the engine and check the water intake holes in the
gearcase for obstruction.
• Low oil pressure problem. The warning horn will sound a continuous six second beep. Stop the
engine and check for low engine oil level. Refer to Fuel and Oil – Checking and Adding Engine
Oil.
ENGINE GUARDIAN SYSTEM
The Engine Guardian System monitors the critical sensors on the engine for any early indications of
problems. Engine Guardian is functional whenever your engine is operating, so you never have to be
concerned about whether or not you are protected. The system will respond to a problem by sounding
the warning horn for six seconds and/or reducing engine power in order to provide engine protection.
If the Guardian System has been activated, reduce throttle speed. The problem will need to be identified
and corrected, if possible. The system must be reset before the engine will operate at higher speeds.
Moving the throttle lever back to the idle position will reset the system.
SMARTCRAFT PRODUCT
A Mercury SmartCraft System instrument package can be purchased for this outboard. A few of the
functions the instrument package will display are engine RPM, coolant temperature, oil pressure, water
pressure, battery voltage, fuel consumption and engine operating hours.
The SmartCraft Instrument package will also aid in Engine Guardian diagnostics. The SmartCraft
Instrument package will display critical engine alarm data and potential problems.
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