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Coolant. General
The freshwater system must be filled with a coolant
that protects the engine against internal corrosion and
from freezing (if the climate requires it). Never use
freshwater alone.
WARNING! Anti-corrosive agents and antifreeze
products are harmful to health (do not drink!)
When there is a risk for freezing the engine coolant
system must be filled with a mixture of 50% Volvo
Penta antifreeze and 50% clean water. This mixture
prevents corrosion and protects against freezing
down to approx. –40°C. It should be used all year
round. NOTE! There should be at least 40% anti-
freeze in the system for complete protection
against corrosion.
Where there is no risk of damage from freezing the
engine coolant can be fresh water with of Volvo Penta
anti-corrosion fluid added. Mix according to the in-
structions on the packaging.
IMPORTANT! Never mix the anti-corrosive
agent with antifreeze as this could result in foam
generation and greatly reduced cooling proper-
ties.
Cooling system
The cooling system is divided into a freshwater and a seawater system. The seawater pump sucks water into
the seawater system through the drive/reverse gear. Seawater is then pumped through the heat exchanger and
into the exhaust elbow pipe where it is mixed with the exhaust gases. The freshwater system is the internal en-
gine coolant system. It is a closed system driven by the circulation pump. The freshwater system engine cool-
ant is cooled in the heat exchanger by the seawater.
WARNING! Risk for water penetration when working with the cooling system. Close the sea cock.
Coolant. Filling
WARNING! Do not open the engine coolant sys-
tem filler cap when the engine is still hot except
in an emergency. Steam or hot coolant may
spray out.
Turn the filler cap to the first stop and let any pres-
sure escape from the system before removing the
cap. Top up coolant if necessary. The level should be
just under the neck of the filler pipe or between the
MIN and MAX marks on the separate plastic expan-
sion tank (accessory) if installed. Reinstall the filler
cap.
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