Mercury 200 Optimax DTS Owner's Manual page 30

Function
Oil level is critically low
Oil pump failure
Engine overspeed
Remote control failure
Sensor out of range
FEATURES AND CONTROLS
Warning Horn
Continuous
Continuous
Continuous
Continuous
Continuous
Intermittent beep
Sound
24
Description
Engine Guardian System is
activated. Power will be
limited. The oil level is critically
low in the engine mounted oil
reservoir. Refill the engine
mounted oil reservoir along
with the remote oil tank. Refer
to Fuel & Oil.
Engine Guardian System is
activated. Power limit will allow
a fast idle. The warning horn is
activated if the oil pump should
ever stop functioning
electrically. No lubricating oil is
being supplied to the engine.
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. Wiring problem to
the remote control or an
internal control problem has
occurred.
Engine Guardian System is
activated. Power limit may
activate at full throttle speed.
Engine Guardian System is
activated. Power limit may
restrict engine speed to idle.