MOTORE A COMBUSTIONE INTERNA

An internal combustion engine comprising an engine block including first and second cylinders and first and second combustion air passages for supplying combustion air to the first and second cylinders, respectively, a first carburetor communicating with the first combustion air passage, having therein a first opening, and including a first fuel supply passageway communicating with the first opening, a second carburetor communicating with the second combustion air passage, having therein a second opening, and including a second fuel supply passageway communicating with the second opening, and a fuel manifold including an integrally molded first manifold portion comprising an elongated portion defining a first main passagewy having a closed end and an opposite open end, and a first nipple portion defining a first nipple passageway communicating betwen the first opening and the first main passageway and extending transversely to the first main passageway, and an integrally molded second manifold portion comprising an elongated portion defining a second main passageway having a closed end and an opposite open end communicating with the open end of the first main passageway, and a second nipple portion defining a second nipple passageway communicating between the second opening and the second main passageway and extending transversely to the second main passageway.