Hunter H31 - Fuel Supply Lines and Hoses; Fuel Valves

Fuel leakin
g
from an
y
part of the fuel s
y
stem can
l
ead to fire and ex
p
losion that can cause serious
bodil
y
in
j
ur
y
or death. Inspect s
y
stem before
f
uelin
g.
U
sin
g
the wron
g
t
y
pe of fuel will result in severe
d
ama
g
e to the en
g
ines. Refer to
y
our owner’s
m
anual for fuel recommendations
.
L
eakin
g
fuel is a fire and explosion hazard.
P
ersonal in
j
ur
y
or death could occur
.
5.1.3 Fuel Tank Fill & Ven
t
The fuel tank fill fittin
g
is located on the port. side on the
stern. The
f
uel tank also has a hull vent
f
ittin
g
. This
f
ittin
g
is also located on the port. side near the
f
uel
f
ill. You can
see the fill in detail in Fi
g
. 5.2, on pa
g
e 5.3.
The
f
uel tank vent serves as a pressure
/
vacuum release
and a safet
y
overflow. The vent is a thru hull fittin
g
with a
f
lame arrestor, so it is imperative that
y
ou keep
the screens clear and in excellent repair. Replace the
screen immediatel
y
if it becomes dama
g
ed or displaced.
P
eriodicall
y
check the vent to see that it is not clo
gg
ed.
The fuel fill and fuel vent hoses, fittin
g
s, and connec-
tions should be inspected for leaks and si
g
ns of dr
y
rot
o
r swellin
g
at least once a
y
ear. I
f
an
y
o
f
these condi-
tions are present, have an authorized service technician
inspect the fuel s
y
stem immediatel
y
. If a leak is found,
turn o
ff
batter
y
switches, disconnect shore power, and
disable an
y
possible source of i
g
nition. Contact
y
our
dealer or Customer Service immediatel
y
.
T
he use of an
y
hose other than the USCG T
y
pe A1
o
r A2 could result in fuel leaka
g
e. Leakin
g
fuel is a
f
ire and explosion hazard. Personal in
j
ur
y
or death
c
ould result
.
5.2 Fuel Suppl
y
Lines and Hoses
If an
y
fuel fill or vent hose's are in need of replacement,
e
nsure that onl
y
U
SCG
T
y
pe A1 or A2 are used. The
e
n
g
ine has a fuel suppl
y
hose that runs from the pickup
tube in the fuel tank to the fuel water separator
(
com-
monl
y
re
f
erred to as the
f
uel
f
ilter
)
, then
f
rom the
f
ilter
to the en
g
ine. Also, the en
g
ine has a fuel return hose
that runs from the en
g
ine back to the fuel tank. The fuel
suppl
y
lines or hoses,
f
ittin
g
, and connections should be
inspected often for leaks and si
g
ns of wear, dr
y
rot, chaf-
in
g
, or swellin
g
. A
g
ood wa
y
to inspect the fuel hoses is
to run
y
our hand alon
g
the len
g
th o
f
the hose includin
g
the fittin
g
s. Leaks will be revealed as wet spots on
y
our
hand. If an
y
evidence of hose deterioration is present,
have a quali
f
ied technician replace all the hoses with
U
SCG T
y
pe A1 hoses immediatel
y!
In Fi
g
.5.3
y
ou can see the
f
uel suppl
y
f
ittin
g
s. The photo
inset shows the close-up of the fuel valve. See Fi
g
.5.5
f
o
r th
e
f
u
n
c
ti
o
n
o
f th
e
f
ue
l v
a
lv
es
.
Note: If a leak is found, turn off battery switches, disconnect
shore power, and disable any source of ignition. Do not start
your engine, or any devices that could create a spark. Contact
your dealer or our Customer Service Department immediately!
If hoses need to be replaced, make sure only USCG Type A1
are used.
5.3 Fuel Valves
Y
ou
r
boa
t h
as
fue
l
s
h
u
t
off
v
a
lv
es
l
oca
t
ed
a
t th
e
t
a
nk in th
e
supp
ly
li
ne route.
Th
ese va
l
ves are use
d
to start or stop
the
f
low o
f
f
uel throu
g
h the suppl
y
lines.
Note: Even if the fuel supply valves are closed, there may be
fuel in the supply lines to the filters and engines ). Disconnecting
Hu
nt
e
r
31
• Fuel S
y
stems
5
.4
Fi
g
. 5.
3