Mercury 40 jet fourstroke User Manual page 70

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
restart 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.
FEATURES AND CONTROLS
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