Mercury 200 OptiMax Manual page 48

Function
Engine Overspeed
Sensor out of Range
ENGINE GUARDIAN SYSTEM
The Engine Guardian System monitors the critical sensors on the
engine for any early indications of problems. The system will
respond to a problem by emitting a continuous beep and/or
reducing engine power in order to provide engine protection.
If 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, 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.
FEATURES AND CONTROLS
Warning Horn
Continuous
Continuous
Intermittent Beep
Sound
40
Description
The warning horn is
activated any time engine
speed exceeds the
maximum allowable RPM.
The system will limit the
engine speed to within the
allowable range. Engine
overspeed indicates a
condition that should be
corrected. Overspeed could
be caused by incorrect
propeller pitch, engine
height, trim angle, etc.
Engine Guardian System is
activated. Power will be
limited.