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8
It is
important
that all fuel connections be
kept
tight
and that dirt be
kept
out
of the
carburetor
Periodically
clean the carburetor flame
arrestor
and
empty any
deposit
out
of the fuel filter sediment bowl
The
carburetors
are
equipped
with
non
adjustable high speed jets
which
require
no
attention
The
idle
adjusting
needles
should be turned
to
the
position
in which the
engine
idles
smoothest
FUEL PUMP
V
The fuel pump
mechanical
or
electrical
with which your
engine
is
equipped
is
war
ranted
by
the manufacturer who
produced
it
l
Electric fuei
pumps will
often click
or
buzz
when the
ignition
switch is turned on
This
is
inherent
in
their
operation
COOLING
SYSTEM
The
model
283
engine
is
equipped
with
a
dual
water
pump
The
two
sections of the
pump
direct water
equally
to
each
bank
of
cylinders insuring
proper
cooling
water
di
stribution
Cooling
water is
pumped
first
into the
exhaust
manifolds
where it is
preheated
to
re
duce
rapid
temperature
change
and
possible
condensationafter
beingrouted
to
thecyl
inder
block
The
cooling
water
after
traveling
the full
length
of the exhaust mani
folds and
back
again
is
routed
into the
rear
end
of
the
cylinder
block
The
water
flows
up
around the
cylinder
bor
es
and into the
cylinder
heads
After
cooling
the valve
areas
in the
cylinder
heads the
water
passes
out
of
the
front of
the
heads and
is
con
ducted
to
the
after
end of the
engine through
separate
overflow passages
in
the mani
folds
It leaves the
engine traveling through
the
exhaust
tube
where it
helps keep
the
exhaust
tube
cool and
helps
to
muffle
engine
noise
OVER80ARD
rn
x
rn
x
r
r
Z
N
C
O
D
r
z
D
O
v
r
OVERBOARD
v
DUAL
WATER
PUMP
OIL COOLER
HYDRAULIC ONLY
MODEL 283
WATER
INLET
SCOOP
STRAINER
WATER COOLING SYSTEM
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