1G-5 Fuel System:
Slow System
This system supplies fuel during engine operation when the throttle valve (1) is closed or slightly opened. The fuel
from the float chamber (2) is metered by the slow jet (3) where it mixes with air coming in through the slow air jet (4).
This mixture, rich with fuel, then goes up through the passage to the pilot screw (5). Part of the mixture is discharged
into the main bore through bypass ports (6). The mixture is metered by the pilot screw (5) and sprayed into the main
bore through the pilot outlet port (7).
6
3
2
4
“C”
“A”
“B”
7
5
1
I827H1170036-02
1. Throttle valve 3. slow jet 5. Pilot screw 7. Pilot outlet port “B”: Fuel/Air mixture
2. Float chamber 4. slow air jet 6. Bypass ports “A”: Air “C”: Fuel
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