Note. The carburetor screws, which can be used to change the composition of the exhaust gases, must be protected by seals by law. If the carburetor has seals, they can be removed with pliers or a screwdriver. It is advisable to screw a suitable self-tapping screw into the seal and remove it together with the seal. In doing so, they are destroyed. After adjustment, the screws must be protected with new seals.
Attention! When working on the carburetor and the fuel supply system, certain rules of cleanliness must be observed, see Chapter Power system, carburetor, fuel injection system, Chapter Rules for cleanliness when working with the power system.