8-4
OPERAUUON
AND
CONSTRUCTION
(See
Fig.
69.
and
40.)
8-
4
-
I
FLOAT
SYSTEM
The float chamber is located just below the carburetor body and, with
a
float and
a
needle valve,
maintains
a
constant fuel level during engine operation.
The fuel flows from the fuel tank into the float chamber through needle valve. When the fuel
rises to
a
specific level, the float rises
;
and when its buoyancy and fuel pressure are balanced,
the needle valve closes to shut off the fuel, thereby keeping the fuel at the predetermined level.
I
BYPASS
THROTTLE VALVE
PILOT OUTLET
\L-
"i"""-
c
PILOT
AIR
JET
VALVE
r*
"_
JI
WELL
-"IF
BODY
4
PILOT
JET
I
I
Fig.
70
FLOAT
NEEDLE
VALVE
Fig.
71
-
45
-
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