Four winns 338 Vista, Owner'S Manual

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Section I
Page 2
348 Vista Owner’s Manual
08/01
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.
Periodically, inspect the vent for any dirt, wax, etc. Care-
fully remove any obstruction with a pipe cleaner or simi-
lar device. Be sure not to puncture the screen . The
vents 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 I2 for anti-siphon location.
Figure I2: 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.
NOTICE
Fuel gauges are not precision instruments. The
reading is relative, and should never be relied
upon as the sole indicator of fuel availability.
F. Fuel Sender
The fuel sender consists of a mechanical arm with float
which measures the fuel in the tank. The sender arm
adjusts with the amount of fuel in the tank and sends a
signal to the fuel gauge. See Figure I3.
Figure I3: Fuel Sender Operation
Due to the mechanical nature of the fuel sender, varia-
tions in readings during various speeds of operation may
occur. This system is merely a relative indication of the
available fuel supply and not a calibrated instrument.
Relative adjustments can be made by your Four Winns
dealer by bending the fuel sender float arm.
i