Installation manual
INSTALLATION
RAW
WATER
COOLING
SYSTEM
Siphon-Break
For
installations
where
the
water-injected
exhaust
elbow
is
close
to
or
below
the
vessel's
waterline,
provisions
must
be
made
to
install
a
siphon-break
in
the
raw
water
supply
hose
to
the
exhaust
elbow.
The
siphon-break
provides
an
air
vent
in
the
raw
water
cooling
system
to
prevent
raw
water
from
filling
the
exhaust
system
and
the
engine's
cylinder
when
the
engine
is
shut
down.
A
CAUTION:
Failure
to
use
a
siphon-break
when
the
exhaust
elbow
is
located
at
or
below
the
load
waterline
will
result
in
raw
water
damage
to
the
engine
and
pOSSible
flooding
of
the
boat.
If
you
have
any
doubt
about
the
position
of
the
water-injected
exhaust
elbow
relative
to
the
vessel's
waterline
under
any
of
the
vessel's
various
operating
conditions
or
when
the
vessel
is
not
under
way,
install
a
siphon-break.
This
precaution
is
necessary
to
protect
your
engine.
The
siphon-break
must
be
installed
in
the
high
point
of a
hose
that
is
looped
a
minimum
of20
inches
(51cm)
above
the
vessel's
waterline.
This
siphon-break
must
always
be
above
the
waterline
during
all
angles
of
vessel
operation
to
prevent,
siphohing.
Use
a
separate
hose
for
this
loop,
and
rim
it
outside
of
the
sourtdshield.
I-
1
SIPHON
BREAK
SIPHON
BREAK
AV/,IILABLE
FROM
YOUR
WESTERBEKE
DEALER
I
SIPHON
BREAK
DIAGRAM
(TYPICAL)
NOTE:
A
siphon-break
requires
periodic'
inspection
and
cleaning
to
ensure
proper
operation.
Failure
to
properly
maintain
a
siphon-break
can
result
in
severe
engine
damage.
Consult
the
siphon-break
manufacturer
for a
proper
maintenance
schedule.
Raw
Water
Intake
A
flush-type
through-hull
fitting
is
recommended
for
the
raw
water
intake.
It
should
be
located
on
the
boat's
hull
where
it
will
be
below
the
waterline
during
all
angles
of
the
boat's
operation.
See
Westerbeke's
INSTALLATION
MANUAL
for
MARINE
ENGINES
and
GENERATORS
for
complete
installation
guidelines.
A
WARNING:
Do
not
use
a
scoop-type
through-hull
fitting
for
supplying
raw
water
to
this
generator.
A
scoop-type
raw
water
inlet
can
develop
substantial
pres-
sure
and
force
water
past
the
raw
water
pump,
flooding
the
exhaust
system
and
allowing
the
water
to
enter
the
engine's
cylinder.
Damage
caused
by
raw
water
entry
into
the
engine's
cylinder
via
the
exhaust
system
is
not
covered
by
Westerbeke's
warranty.
Flooding
of
the
exhaust
system
due
to
water
pressure
can
also
occur
with
a
flush-type
raw
water
intake
on
a
powerboat
that
has
its
bow
up.
This
pressure
can be
caused
by
the
boat's
decreased
waterline
before
the
boat
reaches
its
final
trim,
or
by
the
angle
of
the
boat
to
the
sea
surface
when it
is
underway.
STARTING
BATTERY
CONNECTIONS
The
Westerbeke
18.0
KW
Generator
is
negative
grounded.
The
generator
should
be
connected
to
its
own
12V
starting
battery
(125A
minimum).
All
ground
wires
should
be
tightly
fastened
to
the
ground
bolt
located
on
the
lower
left
side
of
the
engine
below
the
starter
motor.
Make
certain
the
ground
terminals
are
clean.
GROUND
BOLT
Engines & Generators
8