Hunter H33 - Filters (Fuel Water Separators); Main Engine Filters; Fuel Filter Servicing

tem 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
OP
E
N
OP
E
N
S
H
UT
S
H
UT
OPEN
SHUT
OPEN
SHUT
Open Shut
A quick view of the
difference in an open
and shut fuel valve
5.4 Filters
(
Fuel Water Separators
)
The
f
uel supplied to the en
g
ines or the
g
enerator
(
i
f
so
e
quipped
)
ma
y
contact impurities found in the fuel tanks
o
r in the fuel from
y
our supplier. If these impurities are
not removed prior to startin
g
the en
g
ine or
g
enerator, per-
formance ma
y
be seriousl
y
affected. Removal of the fuel
impurities is accomplished b
y
external fuel filters.
5.4.1 Main En
g
ine Filter
s
The 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 the filter.
An authorized service technician should replace all filters
annua
lly
pr
i
or to spr
i
n
g
l
aunc
h
.
Th
e
y
ma
y
nee
d
more
f
requent replacement i
f
y
ou notice poor en
g
ine
/g
enerator
performance due to contaminated fuel.
O
n the
f
ollowin
g
pa
g
e, Fi
g
. 5.6, p
g
. 5.7,
y
ou will
f
ind an
illustration for the Racor Fuel Water separator
(
commonl
y
referred to as the fuel filter
)
. This will break down the
c
omponents o
f
the
f
ilter and their uses within the
f
ilter.
5.4.2 Fuel Filter
T
o
se
rvi
ce
th
e
filt
e
r
:
M
ake sure the en
g
ine is o
ff
.
C
lose shut-off valve between fuel tank and filter i
f
applicable.
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.
When fuel is detected comin
g
out of drain, close drain
qu
i
c
kly
.
C
lose vent plu
g
and ti
g
hten snu
g
l
y
.
O
pen shut o
ff
valve
.
Follow primin
g
instructions.
C
onsult
y
our owner’s packet
f
or more in
f
ormation con-
c
ernin
g
this filter or for replacement parts
.
5.4.3 Here are some
g
eneral
g
uidelines for fuelin
g
y
our boat
:
CAUTION
! !
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.
Fi
g
. 5.
4
Fig. 5.5
Hu
nt
e
r
33
• Fuel S
y
stems
5
.
5