Using the mixture quantity adjusting screw 1, set the crankshaft speed within 900±50 rpm.
Remove the plugs from the exhaust manifolds and screw in sensors 13 0 020 instead.
Attach a gas analyzer and check the carbon monoxide (CO) content in the exhaust gases in each exhaust manifold.
If necessary, remove the plug of the mixture quality (composition) adjusting screw 2 and, turning it with a 13-1-018 key, achieve the proper CO content in the exhaust gases. To increase the CO content in the exhaust gases, screw 2 should be turned clockwise, and to decrease it, counterclockwise.
Each time after turning screw 2, it is necessary to remove the key and briefly press the accelerator pedal.
After completing the adjustment, place a new plug in the hole for the mixture quality adjusting screw 2.