Low Speed Circuit
During periods of idle and part throttle operation fuel is metered through the low speed jet fitted in a branch passage of the main jet. Fuel is then mixed with air from the No. 1 slow air bleed and metered by the slow speed economizer. It is again mixed with air from the No. 2 low speed air bleed. Air/fuel mixture then flows through the low speed passage and is discharged from idle hole or by-pass hole.