The prerequisites for finding faults in accordance with the table below are the perfect adjustment and operation of the engine, all additional units, as well as the tightness of the intake tract and the correct control of the intake air heating in the air filter. In addition, it must be checked whether the fuel is supplied to the carburetor at the prescribed pressure. Faults due to non-observance of the operating instructions during starting must be excluded, see chapter "
Engine fault diagnostics".