Fuel Vents; Anti-Siphon Valves; Fuel Gauge; Fuel Sender - Four winns 248 Vista Owner's Manual

Periodically inspect the cap and the fuel deck plate. The
o-ring seal should be inspected for cracks or damage
and replaced as necessary. Lubricating with a light, wa-
terproof oil or grease is recommended and can extend
the o-ring's longevity.
C. Fuel Vents
Depending on which type of fuel fill determines whether
there is a separate thru-hull fuel vent or a fuel vent lo-
cated below the fill cap application being used. Either
way while the tank is being filled, the air displaced by the
fuel escapes through the vent overboard. When the tank
is almost full, fuel will be ejected from the fuel vent.
Spilled fuel is a fire and explosion hazard. DO
NOT overfill or overflow the tank, or allow fuel spills
into the hull or bilge. If spillage occurs, clean up
immediately and dispose of soiled rags/towels
in a proper container.
NOTICE
When fueling at a marina, DO NOT overfill. Fuel
may spill into the water.
After fueling, replace the fill cap, and wash the areas
around the fuel fill plate and below the fuel vent. Residual
fuel left on the deck and hull sides can be dangerous,
and will yellow the fiberglass. It will also damage the
tape stripes and logos.
For those models with thru-hull venting, periodically, in-
spect the fuel vent(s) for any dirt, wax, etc. Carefully
remove any obstruction with a pipe cleaner or similar
device. Be sure not to puncture the screen. The vent
screens are designed to keep insects and foreign matter
from contaminating the fuel and fuel system. The stain-
less steel cap is not removable.
D. Anti-Siphon Valves
The fuel withdrawal line is equipped with an anti-siphon
valve where the line attaches to the fuel tank. The valve
prevents gasoline from siphoning out of the fuel tank should
a line rupture. See Figure I3 for anti-siphon location.
Vista™ Owner's Manual
™
Figure I3: Fuel Tank Fittings
DO NOT remove the anti-siphon valve(s) from the
system. Should the valves become clogged,
clean and reinstall or replace.
The fuel withdrawal is positioned in the fuel tank
to achieve optimum fuel usage, and fuel line rout-
ing. At certain speeds and hull trim angles, the
fuel supply at the withdrawal can increase or
decrease accordingly. Be extremely careful when
attempting to operate the boat on a minimum
amount of fuel. Though some fuel may be in the
tank, the relative trim angle of the boat may cause
the fuel to flow away from the withdrawal.
NOTICE
On all Vista® models, access to the anti-siphon
valve and fuel sender is by either an access plate
or through the engine compartment.
E. Fuel Gauge
The fuel gauge indicates the amount of fuel in the fuel
tank. See Section E-9F - Fuel Gauge for additional infor-
mation on fuel gauge use.
F. Fuel Senders
The fuel sender consists of a float which travels up and
down a stationary tube. The float measures the level of
the fuel in the tank and sends a signal to the fuel gauge.
See Figure I4.
Section I
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