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Group 23 Fuel system
Fresh water system
The freshwater system is the engines internal cooling
system that ensures that the engine operates at the
correct temperature. It is a closed system and must
therefore always be filled with a mixture of at least
40 % concentrated coolant and 60 % water, to offer
protection from interior corrosion, cavitation and frost
bursting.
We recommend that you use “Volvo Penta Coolant,
Ready Mixed”, alternatively “Volvo Penta Coolant”
(concentrated) mixed with pure water according to
spec, see “Coolant. Mixing”. This grade of coolant is
the only one that is developed for and approved by
Volvo Penta.
The coolant should contain ethylene glycol of a good
quality with a suitable chemical consistency that of-
fers complete engine protection. Using an anti-corro-
sion mixture exclusively is not permitted in Volvo
Penta’s engines. Never use water by itself as the
coolant.
IMPORTANT! Coolant of a suitable chemical for-
mula must be used all year round. This applies
even if there is no risk for frost damage, so that
the engine always has complete corrosion pro-
tection.
Future warranty claims on the engine and ancil-
laries may be rejected if an unsuitable coolant
has been used or if the instructions concerning
coolant mixing have not been adhered to.
NOTE! The anti-corrosive agents become less effec-
tive after a time, which means that the coolant must
be replaced, see “Service schematic”. The cooling
system should be flushed when the coolant is
changed, please refer to “Cooling system. Cleaning”.
“Volvo Penta Coolant” is a concentrated coolant
that is to be mixed with water. It has been prepared to
work best with Volvo Penta engines and offers excel-
lent protection against frost and cavitation damage,
plus frost bursting.
“Volvo Penta Coolant, Ready Mixed” is a ready-
mixed coolant, 40 % “Volvo Penta Coolant” and 60 %
water. This concentration protects the engine against
corrosion, cavitation damage and freezing conditions
down to -28 °C.
Group 26 Cooling system
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