Abstract: An auxiliary starting carburetor for internal combustion engines is provided, arranged so as to supply to the engine an auxiliary fuel, particularly in aerosol form. This carburetor comprises: a hollow rod adapted to bear on the valve of the fuel reservoir, an electromagnetic coil for actuating the rod, a chamber provided with a piston for receiving a measured amount of fuel and an outlet connected to the manifold for the fuel expelled by the piston urged by a spring.