Based on the above, you should not arbitrarily, in order to improve engine performance, rotate the mixture quality adjustment screw. If the check reveals that the CO content in the exhaust gases exceeds 0.5÷1.5%, then only in this case should the appropriate adjustment be made by rotating the specified screw.
A gas analyzer is required to perform this test. All of the above conditions must be met during the test. In addition, the exhaust system tract must be checked for leaks.