Maintenance: Freshwater system
39
Frost protection mixture
If there is a risk of frost, use a mixture of 50% Volvo
Penta anti-freeze (glycol) and 50% water (to ASTM
D4985). This mixture prevents against frost bursting
down to about –40°C (–40°F), and should be used all
year round.
IMPORTANT! Even if the temperature never
falls down as far as –40°C (–40°F), use the
above-mentioned mixture ratio to give full corro-
sion protection.
Mix the glycol with water in a separate vessel before
filling the system.
WARNING! Glycol is poisonous (dangerous to
drink).
IMPORTANT! Do not use alcohol in the cooling
system.
Corrosion protection mixture
When there is never any risk of frost, water (to ASTM
D4985), mixed with Volvo Penta anti-corrosion addi-
tive, can be used as a coolant.
We recommend that an anti-freeze mixture should be
used all year round, irrespective of the climate.
Mix, following the instructions on the package. Warm
the engine up after filling, to give the additive the best
effect.
If the operation time exceeds 500 hours a year, the
corrosion protection of the coolant must be topped up
with 1/2 liter of anti-corrosion additive every 500
hours of operation.
WARNING! Anti-corrosion additive is poisonous
(dangerous to drink).
IMPORTANT! Never mix anti-corrosion additive
with anti-freeze (glycol). This can cause foam-
ing, and severely affect cooling ability.
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