Air damper actuator adjustment
Remove the air filter.
Remove screw 1 (see photo), disconnect the choke control rod.
Adjust exit length («A») sheaths of thrust from the clamp by a value not exceeding 15 mm.
Move the choke control lever all the way, which corresponds to the full opening of the choke, and insert the choke control rod so that the choke control handle has a reserve of 2 mm. Tighten screw 1.
Air damper starting gap adjustment
Set the choke control lever to position II (see photo), corresponding to starting a cold engine.
Wherein (In the presentation, the air damper should open by 5.3±0.3 mm. To check the starting clearance «B» air damper, use a drill.
If necessary, adjust the starting clearance of the air damper with screw 2.
Engine idle adjustment
Set the engine idling speed to 800±100 rpm and carbon monoxide content (SO) in exhaust gases 1.5%, alternately turning adjusting screws 1 for quantity and 2 for quality (composition) mixtures.
Adjusting the position of the accelerator pump sprayer
The accelerator pump sprayer is pressed into the carburetor body. Check the direction of the jet of fuel coming out of the atomizer, which should hit the top of the diffuser. If necessary, secure the tube in position with Loctite No. 90 adhesive.
Replacing the needle valve and float
Remove the carburetor cover.
Remove the needle valve.
Remove the stopper of the float axis, having previously noted its position, and the removed float together with the axis.
Install new needle valve and float. Replace the removed parts in the reverse order of removal.