CARBURETOR
B
FUEL
PUMP
Figure
6-1
The fuel pump conveys the pulsating pressure in the
crankcase to the diaphragm chamber to vibrate the
diaphragm and change the volume, thereby drawing
and discharging the fuel. The diaphragm suction and
discharge passages have one valve each which
allows fuel flow in one direction only, thus preventing
reverse fuel flow.
FLOAT
SYSTEM
Figures
6-1
and
6-2
The fuel bowl (float chamber)
is
mounted directly
beneath the carburetor body. Fuel from the fuel tank
is supplied to the fuel bowl through the fuel inlet and
needle valve. The fuel in the bowl is maintained at a
predetermined level by the float through its control
of
the needle valve. The needle valve opening is
regulated by the speed and load (fuel demand)
of
the
engine.
Figure
6-1.
Sectional Views
of
Carburetor
Models
WO1-115
and
WO1-150
i
6-
1
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