Fuel Vents; Fuel Gauge; Fuel Sender - Scarab jet boat Owenrs Manual

NOTICE
Fuel may spill into the water.
Avoid overboard spills. Be alert. The fuel nozzle
should automatically shut off when using an
automatic shut off nozzle. Be ready in the event
it does not or if you are using a different type of
nozzle for dispensing fuel. DO NOT TOP OFF.
left on the deck and hull sides can be dangerous and
stripes and logos. Care should be taken, when
cleaning, to prevent contaminating the fuel vent and
recommended.
D. Fuel Vents
is installed. See Figures B31. While the tank is being
vent overboard.
E. Fuel Gauge
The fuel gauge indicates the amount of fuel in the
tank. See Section B-4D - Fuel Gauge for addition al
information.
F. Fuel Sender
level of the fuel in the tank and sends a signal to the
fuel gauge. See Figure B27.
Figure B27: 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 avail able fuel supply and not a calibrated
instru ment. With this type of sending unit a more accu-
Boat Systems - Section B
rate measurement of fuel level is obtained with the
boat in a level position.
The gauge readings will also vary with the trim angle
of the boat. When sitting at a dock and the boat is
nearly level, the fuel gauge will register accurately.
Refer to Figure B32. When boating, the trim angle of
the boat changes and affects the gauge readings.
Under these conditions, the fuel sender will register
by the angle of the fuel in the tank as shown in Figure
B28.
Figure B28: Effects of Trim Angle
It is very important to keep track of hours and fuel
consumption to obtain an average gallon per hour
the back of this manual. This will help to prevent any
prob lems with running out of fuel on the water.
consumption which can be used as a guide until
Because of boating conditions, speed, weight and
other factors common to your situa tion, fuel consump-
tion will vary between your boat and consumption
When the fuel gauge begins to register below the
has affected the sender reading. When the gauge
there may be 3 to 4 gal lons of fuel in the tank. See
Figure B29.
Figure B29: Trim Angle Effect with Low Fuel
Owner's Manual Page 60