- Remove the air filter.
- Press several times a control lever butterfly valves; at the same time two sprays of the accelerating pump have to leave a fuel stream.
- If it does not occur, clear sprays, wash out them gasoline and blow compressed air, and also check a condition of a diaphragm which has to be whole, without damages (at assembly of the accelerating pump direct a conic screw spring small diameter towards a diaphragm).
- Remove a pneumatic actuator of butterfly valves against the stop of the adjusting screw of amount of mix of idling in a control lever butterfly valves; at the same time the lever of the drive of the accelerating pump has to concern a plunger hardly.
- If necessary the nut 1 determining the beginning of supply of fuel by the accelerating pump achieve the necessary result.
- The adjusting screw 2 supply of fuel achieve a gap between it and a cover of the accelerating pump within 3,5±0,2 mm, having provided thereby the required fuel supply with the pump on condition of uniform supply of fuel it sprays.
- At doubt in the correct productivity of the accelerating pump remove the carburetor.
- Fix a tank with fuel 2 m higher than the carburetor and attach a tank hose to the entrance union of the carburetor.
- Put on a beaker under cameras of the carburetor and check productivity of the accelerating pump for 1 cycle, having slowly moved several times against the stop a control lever with butterfly valves. For increase in productivity of the pump turn out the adjusting screw 1, and for reduction — screw it.
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