Mercury 225 Pro XS - Fuel System

OPERATION
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7. Turn the ignition key to the "START" position. Release the key when
the engine starts. If the engine fails to start in ten seconds, return the
key to the "OFF" position, wait one second, and try again.
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8. Check for water coming out of the water pump indicator hole.
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NOTE: The electronic starting system will automatically prime (choke) the
engine and increase idle speed for starting.
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CAUTION
Avoid possible engine damage. If no water is coming out of the water
pump indicator hole, stop the engine and check the cooling water intake
holes for obstruction. No obstruction may indicate a water pump failure
or blockage in the cooling system. These conditions will cause the engine
to overheat. Have the outboard checked by your authorized Mercury
Marine dealer. Operating the engine while overheated will cause engine
damage.