Abstract: A carburetor having an induction passage with an inlet end and an outlet end for discharging into a corresponding inlet of an associated intake manifold of a combustion engine has a venturi and a main fuel discharge nozzle in association therewith within the induction passage and a throttle valve downstream of the venturi and main fuel discharge nozzle for controlling the discharge of motive fluid from the outlet end and into inlet of the intake manifold; a second induction passage generally in parallel with a portion of the first mentioned induction passage is also provided with an inlet and outlet along with a throttle valve and a fuel discharge passage therebetween; the outlet of the second induction passage is placed in communication with the first mentioned induction passage as to be generally between the venturi and throttle valve of the first mentioned induction passage.