| 1. Remove the carburettor from the engine. |
| 2. Using the lever, remove the metal stopper closing the screw of adjustment of partial loading which is located adjacently with submitting fuel hose. |
| 3. If the adjustment reason is the stop or engine fluctuations a mix too poor and it is necessary to turn the screw on a turn quarter counter-clockwise. |
| 4. If the adjustment reason – fuel overconsumption a mix too rich also it is necessary to turn the screw on a turn quarter clockwise. |
| 5. Establish the carburettor and check up, whether engine work has improved. |
| 6. If the further adjustment is necessary, execute it, but do not turn the screw more than on half of turn from a starting position. |
| 7. Establish on the screw a new metal stopper. |