Mercury 125 OptiMax, Owner'S Manual

Page: 55 / 133

FEATURES AND CONTROLS
eng
45
Warning Horn
Function Sound Description
Cooling
system
problem
Continuous Engine Guardian System is activated.
Power limit will vary with level of overheat.
Shift outboard into neutral and check for a
steady stream of water coming out of the
water pump indicator hole. If no water is
coming out of the water pump indicator hole
or flow is intermittent, stop engine and
check water intake holes for obstruction.
Oil level is
critically low
Continuous Engine Guardian System is activated.
Power limit will allow a fast idle. The oil level
is critically low in the oil tank. Refill the oil
tank. Refer to
Fuel and Oil
.
Oil pump
failure
Continuous 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.
Engine
overspeed
Continuous 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.
Sensor out of
range
Continuous Engine Guardian System is activated.
Power limit may activate at full throttle
speed.
Intermittent
beep
Engine Guardian System is activated.
Power limit may restrict engine speed to
idle.
Engine
running cold at
slow speed
One beep Engine is not reaching correct temperature
while operating below 1000 RPM. Have
your dealer check the engine.