Mercury 300 - PRO MAX 3.0L User Manual page 30

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FEATURES & CONTROLS
a
5
Warning Horn System (Continued)
ENGINE OVERHEAT
The engine overheat warning is activated when the engine tempera-
ture is too hot.
The engine overheat warning system works as follows:
4
The warning horn sounds continuously. The warning system will
automatically limit the engine speed to 3000 RPM.
5
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 (a).
Operating the engine while overheated will cause engine
damage. The overheat problem must be corrected before you
can resume normal operation.
a. If no water is coming out of the water pump indicator
hole (a) 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 cool-
ing system or a water pump problem.
•
Have the outboard checked by your dealer.
b. If a steady stream of water is coming out of the water
pump indicator hole (a) and warning horn continues:
•
There may be insufficient cooling water or an engine problem.
•
Stop engine and have it checked by your dealer.
CAUTION
(continued on next page)
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b