| 1. To warm up the engine up to the normal working temperature. |
| 2. To connect the analyzer of exhaust gases and a tachometer. |
| 3. To keep the speed of 3000 rpm within about 30 seconds, and then to release an accelerator pedal (or a butterfly valve in the carburetor). |
4. To wait before installation of indications of the analyzer and to read indications of concentration WITH in exhaust gases idling of the engine. |
5. In case of need to adjust engine speed by means of the persistent screw of the butterfly valve serving for adjustment of speed of idling. |
| 6. If concentration WITH small, then by means of the thin screw-driver to remove a casing of the screw of adjustment of composition of mix and to adjust respectively position of this screw. |
| 5. To determine the speed of the engine of 3000 rpm and in about 30 seconds to pass (as well as in the previous case) to idling and to check the speed of the engine and contents WITH. |
| 8. To establish a casing of the screw of adjustment of composition of mix. |
