Winter Operation - Volkswagen Marine SDI Series Operating Manual

INSPECTION

Winter operation

An inspection service should always be
conducted on the Volkswagen Marine boat
engine before the start of the cold season.
In addition, please observe the following
instructions when operating the Volks-
wagen Marine boat engine at extremely low
temperatures:
Important
Observe the safety precautions
beginning on page 17 before
performing out any work on the
engine or
compartment.
Battery
The battery capacity decreases as the tem-
perature drops. This is due to its chemical
and physical properties. This is why an ex-
tremely cold battery, which is also not well
charged, only has a fraction of the starting
power it has at normal temperatures.
We recommend recharging the battery
every 6 to 8 weeks in the winter. The acid
level and density must be checked. The
voltage of the cells must be measured with
the battery loaded.
It is best to have this work conducted by a
VW Marine Service Partner.
If the engine is not used for several
weeks at extremely low sub-zero
temperatures, the battery should be
removed and stored in a frost-proof
room to prevent it from freezing and
being destroyed.
62
62
in the engine
Cable connections
Check and clean all cable connections, as
oxidised connections lead to voltage drops
and starting difficulties.
Cooling system
The coolant consists of 67 % water and a
33 % share of our coolant additive
G 12 A8C (glycol-based antifreeze with
corrosion protection additives).
It is advisable to use and antifreeze effective
o
down to -25 C.
At temperatures down to -30
in a ratio of 55 % to 45 %, and down to -35
one of 50 % to 50 % should be used.
If for climatic reasons greater frost protec-
tion is required, the percentage of G 12 A8D
can be increased, however only up to 60 %
(frost protection down to approximately
o
-40 C), as otherwise the front protection is
decreased again and the cooling effect
worsens.
Only our G 12 A8D or an additive with the
specification
container label) may be used as a coolant
additive. These additive are available from
VW Marine Service Partners.
o
C a mixture
TL-VW 774 D
INSPECTION
o
C
(see