Mercury 25 EFI FourStroke User Manual page 73

Function
Start up
Engine over
temperature
Low oil pressure
Engine
overspeed
Water temp or
MAP sensor out
of range
ENGINE OVERHEAT
If the engine overheats, immediately reduce throttle speed to
idle. 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 cooling water intake
holes for obstruction. If no obstruction is found, this may indicate
a blockage in the cooling system or a water pump problem. Have
the outboard checked by your dealer. Operating the engine while
overheated will cause engine damage.
eng
FEATURES AND CONTROLS
Sound
One beep
Continuous
Continuous
Continuous
Intermittent
short beep
Warning System
Warning
Light
On for 5
seconds
On
On
On
Flashes
63
Description
Normal system
test
Engine overheat
Low oil pressure
Engine speed
exceeds
maximum
allowable RPM
Engine speed
will be limited.
Consult your
dealer for
assistance.
9647
Engine
Speed
Limited to
2800
RPM
X
X
X