FNM HPE 300 Owner's Manual page 48

Engine maintenance
'
O M
WNER S ANUAL
HPE300
Marine Diesel Engines
In any case the coolant liquid level must be over the engine head to ensure a correct operation.
ATTENTION! Always read the coolant manufacturer instructions according to the temperature.
Never refill the coolant circuit with sea water!
ATTENTION! Be careful when you open the filler cap of the expansion tank, pressurized liquid may
splash out CAUSING DAMAGE TO PERSONS OR PROPERTY.
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