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4.
Fresh water cooling system
(See Note 5 on page 6.)
The system consists of a sea water pump which pumps raw sea "water
through a heat exchanger to remove heat from the coolant.
The raw
wa~er
is discharged overboard through the exhaust line.
The engine coolant
(fresh water with or
without antifreeze)
is
circulated by the fresh water pump in continuous cireui
t.
pumped
through the cylinder block, cylinder head, heat exchanger and back
to the fresh water pump.
The total system is very reliable and requires only a daily check
of the water level in the system plus routine check of hose clamps
and fittings.
It is likely that
zinc electrodes will waste away from contact
with
sea water.
It
is
also
possible
for
the
raw
water
pump
impeller to fail due to lack of sea ..... ater or deterioration.
An
early "sign-of impeller" failure is less ..... ater and more stearn at the
":,
exhaust through hull fitting.
It is
recommended.
therefore,
that zinc electrodes,
an impeller
kit, a pump belt and a thermostat ..... ith gasket be kept onboard at
all
times.
These
parts
should
be
ordered
from
your
nearest
stocking dealer and used as inspection dictates.
17
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