Vaz 21213 - Page 47

Table 2-2
21073-1107010 CARBURETTOR
Parameters Primary barrel Secondary barrel
Barrel diameter, mm 32 32
Venturi diameter,mm 24 24
Main jet system:
• fuel jet marking* 107.5 117.5
• air jet marking 150 135
Emulsion tube, type ZD ZC
Idling and air correction systems, primary barrel:
• fuel jet marking 39
–
• conventional flow,** air jet 140 –
Air correction system, secondary barrel:
• conventional flow, fuel jet
– 70
• conventional flow, air jet
– 140
Full throttle enrichment (econostat):
• conventional flow, fuel jet
– 70
Part throttle enrichment (economizer):
• fuel jet marking 40
–
• spring compression (9.5 mm length), N 14.5±15%
Accelerator pump:
• atomizer marking 45
–
• delivery (10 full strokes), cc 14 –
• cam marking 4 –
Starting clearances***:
• choke valve (clearance Ç), mm 3.0
–
• throttle valve (clearance ë), mm 1.1 –
Diameters,mm:
• crankcase vent drilling 1.2
–
• vacuum advance unit orifice 1.2
• needle valve bore 1.8
• fuel return orifice to petrol tank 0.70
__________________________________________________________________________________
* Jet marking is flow-related. Flow rate is measured with a micrometer, calibrated against the reference jets.
** Conventional flow through the jet is determined against the reference jet under a special procedure; in operation no control is required.
***Starting clearances are as shown in Fig.2-86
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