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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