Hunter H31 - Fuel Filters

these fittings without properly bleeding the system of fuel could
result in emptying the fuel filters and causing a fuel spill. Only
a qualified technician should ever make repairs to your fuel
system.
The
f
uel suppl
y
valves are the
“
ball t
y
pe” valves. Turnin
g
the handle so it is perpendicular to the valve bod
y
shuts
o
ff the suppl
y
or return. Turnin
g
the handle so it is in line
with the valve bod
y
opens the valve, as shown in Fi
g
.
5
.4.
E
xample o
f
Fuel
S
uppl
y
Lines and Valves
5.4 Filters
(
Fuel Water Separators
)
The
f
uel supplied to the en
g
ine ma
y
contact impurities
found in the fuel tanks or in the fuel from
y
our sup-
p
lier. If these im
p
urities are not removed
p
rior to start-
in
g
the en
g
ine, per
f
ormance ma
y
be seriousl
y
a
ff
ected.
R
emoval of the fuel impurities is accomplished b
y
exter-
n
a
l f
ue
l filt
e
r
s
.
5.4.1 Main En
g
ine Filter
s
E
ach en
g
ine has a separate
f
ilter located awa
y
f
rom the
e
n
g
ine. Check the Fuel Arran
g
ement illustration at the
e
nd of this cha
p
ter for the exact location of these filters.
An authorized service technician should replace all filters
annuall
y
prior to sprin
g
launch. The
y
ma
y
need more fre-
quent replacement i
f
y
ou notice poor en
g
ine per
f
ormance
due
t
o
co
nt
a
min
a
t
ed
f
ue
l.
In the Fi
g
ure. 5.6, pa
g
e 5.7
y
ou will
f
ind an illustration
for the Racor Fuel Water separator
(
commonl
y
referred
to as the
f
uel
f
ilter
)
. This will break down the components
of
th
e
f
ilt
e
r
a
n
d
th
e
ir
uses
within th
e
f
ilt
e
r.
T
o
se
rvi
ce
th
e
f
ilt
e
r
:
M
ake sure the en
g
ine is off.
C
lose shut-o
ff
valve between
f
uel tank and
f
ilter i
f
a
ppli
ca
bl
e
.
O
pen vent plu
g
on mountin
g
head with a
½
” wrench.
Note: Do not leave drain open for very long as it will
empty filter of all fuel.
W
hen
f
uel is detected comin
g
out o
f
drain, close drain
quickl
y.
C
lose vent plu
g
and ti
g
hten snu
g
l
y.
O
pen shut off valve.
Follow primin
g
instructions.
C
onsult
y
our owner’s packet for more information con-
c
ernin
g
this
f
ilter or
f
or replacement parts
.
5.4.5 Here are some
g
eneral
g
uidelines for fuelin
g
y
our boat
:
U
sin
g
the wron
g
t
y
pe of fuel will result in severe
dama
g
e to the en
g
ines. Refer to
y
our owner’s
m
anual for fuel recommendations
.
1.
2
.
3.
4.
5.
6.
Hu
nt
e
r
31
• Fuel S
y
stems
5
.
5
Fi
g
. 5.
4
Fi
g
. 5.
5