Power supply system for carburetor engines: 1 - fuel pump; 2 - fuel fine filter; 3 - carburetor; 4 - air filter housing; 5 - cover; 6 - air filter element; 7 - intake manifold; 8 - intake manifold gasket; 9 - intake manifold damper housing; 10 - damper housing gasket; 11 - solenoid valve for controlling the intake manifold flaps at fast idle.