·
FLUSHING
THE
ENGINES
COOLING
SYSTE~
Engine flushing should
be
performed a minimum
of
at least
t.W,ice
per
operating season, more often in those areas
\Vhere
the unit may not.be
s1,1bjectto
winter storage.
Int?ose
.
locations where the unit is used year round,
flushing the unit
once every 4 months is recommended.
This procedure
is best accomplished by disconnecting the
water intake hose
from the vessel's thru-hull fitting. Insert
the hose end into a large container
of
fresh water.
Close
the
thru-hull
intake
valve
before
disconnecting
the
hose.
Before starting the engine, remove the engine thermostat
(replace the gasket
and cover). This will ensure a full flow
of
water thru the engine.
Re·install
the
thermostat
once
Run the unit for
10
minutes or longer to adequately flush the
cooling system.
The
fresh
water will flush out the engine's water passages and
exhaust lines:
If
the engine
is
being stored
and
there is a prob-
ability
of
freezing, flush the engine with fresh water and then
prior to shutting the
unit dowp. Substitute the fresh water
supply with a concentrated antifreeze mixture and
run this
through the engine to provide freeze and corrosion protection
for both the engine and exhaust system.
When recommissioning, make certain the thru-hull intake
valve is open
so
the engine will quickly receive cooling
water.
flushing is
complete. A
NOTE: Prior to flushing the engine, inspect the coolant by-
CAUTION:
Do
not
connect
an
external
fresh
water
pass hose and its attachment fittings to insure that there are
supply
directly
to
the
engine's
coaling
system.
This
can
no obstructions occurring in the fittings or the hose.
cause
naading
of
the
engine
resulting
in
internal
Provide
an
external fresh water supply for the container to
maintain the water level
in
the container while the unit is being
i"ll:::r--,da~_ma
___
ige.
v
'----------------
operated during the flushing process.
. .
RAW
WATER
ALTER
EXTERNAL
FRESH
{\
WATER
SUPPLY
.RAW
WATER
PUMP
FRESHWATER
Engines & Generators
37
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