1G-9 Fuel System:
Float System
The float (1) and needle valve (2) work in conjunction with one another. As the float (1) moves up and down, so does
the needle valve (2).
When there is a high fuel level in the float chamber (3), the float (1) rises and the needle valve (2) pushes up against
the valve seat. When this occurs, no fuel enters the float chamber (3).
As the fuel level falls, the float (1) lowers and the needle valve (2) unseats itself; admitting fuel into the float chamber
(3).
In this manner, the needle valve (2) admits and shuts off fuel to maintain the appropriate fuel level inside the float
chamber (3).
3
2
1
“A”
I827H1170039-02
1. Float 3. Float chamber
2. Needle valve “A”: Fuel
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