Notes:
- The marking of the jets is determined by the flow rate, which is measured using micrometers. Adjustment of micrometers is carried out according to reference jets.
- The conditional consumption of the fuel jet is determined by the reference jet using a special method. It is not subject to control during operation.
Carburetor calibration data
Parameter | First chamber | Second chamber |
Mixing chamber diameter, mm | 32 | 32 |
Diffuser diameter, mm | 21 | 23 |
Main dosing system: fuel jet marking air jet marking | 97,5 | 97,5 |
Type of emulsion tube | 23 | ZC |
Idle system and transition systems: fuel jet marking air jet marking | 42 170 | 50 120 |
Econostat: conditional consumption of the fuel jet | - | 60 |
Power mode economizer: fuel jet marking spring compression force at a height of 9.5 mm, N | 40 | - |
Accelerator pump: atomizer marking cam marking fuel supply for 10 cycles, cm3 | 35 7 11,5 | 40 - 11,5 |
Start clearances: air damper, mm throttle valve, mm | 3±0,2 0,85 | - - |
Hole diameter for vacuum corrector, mm | 1,2 | - |
Needle valve hole diameter, mm | 1,8 | |
Diameter of the fuel bypass hole in the tank, mm | 0,7 | |
Engine crankcase ventilation hole diameter, mm | 1,5 | - |
1. The float must freely, without jamming, turn on the axis and not touch the walls of the float chamber. Otherwise, adjust the float position as indicated in subsection 11.3.9.
2. The valve needle must move freely in the socket. Valve seat tightening torque 15 Nm (1.5 kgf·m).
3. Solenoid valve tightening torque 4 Nm (0.4 kgf·m).
4. Install the jets in accordance with the markings on them (see table "Carburetor calibration data").
5. If the air damper drive lever was removed, apply UG-9 type sealant to its end face and upper threads before screwing in the lever shaft.
6. When assembling the accelerator pump, screw on the cover fastening screws, press the pump drive lever all the way and in this position finally tighten the cover fastening screws.
7. Adjust the trigger and check the operation of the second chamber lock mechanism (see subsections 11.3.8. and 11.3.10.).