Mercury Racing HP565, Manual, Page: 87 / 151

MAINTENANCE
eng
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3. When refilling the coolant section after it has been
completely drained, fill the reservoir to within 12 mm
(0.50 in.) of the top of the reservoir neck before starting the
engine.
4. Replace the pressure cap.
NOTICE
Without sufficient cooling water, the engine, the water pump,
and other components will overheat and suffer damage.
Provide a sufficient supply of water to the water inlets during
operation.
5. Supply cooling water to the engine.
6. With the engine running, check the hose connections,
fittings, and gaskets for leaks. Also observe the engine
temperature gauge to ensure that the engine operating
temperature is normal. If the gauge indicates excessive
temperature, stop the engine immediately and determine the
cause.
!
CAUTION
A sudden loss of pressure can cause hot coolant to boil and
discharge violently resulting in serious injury from burns.
Allow the engine to cool down before removing the coolant
pressure cap.
7. After the engine has cooled completely, recheck the coolant
level and add coolant, if necessary.
8. If the reservoir was completely emptied of coolant, a
significant amount of air remains in the cooling system. Refill
the reservoir to the "FULL" mark, repeat the warm‑up/
cool‑down cycle, and check the coolant level again.
9. Maintain the coolant level in the reservoir at or near the
"FULL" mark with the engine cold.
DRAINING
Contact your authorized Mercury MerCruiser dealer.