Carburetor idle adjustment screws 2105-1107010
1 – mixture quantity screw; 2 - mixture quality screw
Installation of limit bushings on the carburetor idle adjustment screws 2105-107010
a - on the screw of the amount of the mixture; b - on the mixture quality screw
Elements for adjusting the idle speed of the engine include screw 2, which determines the composition of the mixture, and screw 1, which regulates the amount of the mixture.
So that the owner does not violate the factory adjustment, restrictive plastic bushings are pressed onto the screws, allowing the screws to be turned only half a turn.
If it is not possible to adjust the CO content in the exhaust gases with the bushings, then by unscrewing the screws, break the heads of the bushings, unscrew the screws, remove the bushings from them and screw the screws into the carburetor again.
Attention! Blue bushings are installed at the factory, and red bushings at service stations.
Idle speed adjustment is carried out on a warm engine (coolant temperature 90–95°С and oil 75–90°С) with adjusted gaps in the gas distribution mechanism and with a correctly adjusted ignition timing.
1. Screw 1 (see fig. Carburetor idle adjustment screws 2105-1107010) set the crankshaft speed to 820–900 min using the stand tachometer–1.
2. Use screw 2 to achieve the concentration * CO in the exhaust gases within 0.5–1.2% at this position of screw 1.
3. Screw 1 restore the crankshaft speed 820-900 min–1.
4. If necessary, use screw 2 to restore the CO concentration to 0.5–1.2%.
5. Press restrictive plastic bushings onto the screws, orienting the splines of the bushings relative to the mounting tabs (see fig. Installation of limit bushings on the carburetor idle adjustment screws 2105–1107010).
* Reduced to 20°C and 1013 GPa (760 mmHg Art.).