Air damper starting gap adjustment
Remove the starter cover.
Move the lever to the air damper actuator and check the air damper gap with a drill with a diameter of 4.0-4.4 mm.
In the event of a deviation from the norm, achieve the proper clearance with the adjusting screw of the pneumatic actuator.
Auxiliary starting device
Checking the corrector of the qualitative composition of the mixture
Remove the corrector for the qualitative composition of the mixture and apply a voltage of 12 V to the corrector for at least 2 minutes, closing the valve body to «mass».
The corrector needle should come out.
Cool the corrector to a temperature of 2041 and check the protrusion of the corrector needle, which should be within 2±0.5 mm.
Checking the protrusion of the actuator needle
Remove the actuator (automatic adjustment valve) and check the protrusion of its needle, which at a temperature of 20°C should be within 4-6 mm
Checking the throttle actuator of the 1st chamber
Check Spring Preload: Size «A» should be equal to 23 mm. In case of deviation from the norm, achieve the correct size with the adjusting nut 1.
Check clearance «B» between the throttle control lever and the stop screw, which should be 4.5-5.5 mm. If necessary, set the specified clearance by changing the length of the threaded rod 2.
Checking the fuel level in the float chamber
Remove the carburetor cover and gasket.
Measure with a ruler the gap between the highest point of the floats of the 1st and 2nd chambers and the mating surface of the carburetor, which should be equal to 28 and 30 mm, respectively. It is adjusted by bending the tongue and float levers.
Adjustment of the throttle opening of the 1st chamber at idle
Tighten the mixture amount adjusting screw 1 (see photo).
Set the throttle stop screw 3 of the 1st chamber to 550 rpm. Adjusting screw quality (mixture composition) 2, having previously removed the plug, achieve a CO content in the exhaust gases of 2.2%.
Adjusting screw 1 bring the crankshaft speed to 900 rpm.
Check that the CO content in the exhaust gases does not exceed 1%.
After completing the adjustment, install in the hole for the adjusting screw quality (composition) mix a new plug.
Engine idle adjustment
Adjusting screw 1 set the engine speed to 900 rpm.
Check the content of CO in the exhaust gases.
Adjusting screw if necessary (composition) mixture 2, having previously removed the plug, achieve the proper CO content in the exhaust gases.
Use screw 1 to restore the crankshaft speed to 900 rpm and check the CO content in the exhaust gases again.
Repeat the above operations until you set the CO content in the exhaust gases to no more than 1% at a crankshaft speed of 900 rpm.