4-12 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 pilot 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.
AIR
FUEL/AIR MIXTURE
FUEL
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