1.5-Inch Single-Barrel Side-Draft Carburetor

The SU AUC1300 is a single-barrel, side-draft carburetor engineered by SU Carburetter Company. It features a mechanical choke and a spread bore mounting flange, with a 1.5-inch bore for optimal air-fuel mixture. This AUC1300 model is specifically identified as an HS4 type carburetor, commonly found on MG Midget and MGB models. The SU carburetor design utilizes a constant depression system, where the depression at the jet remains near constant regardless of engine operating conditions, ensuring good atomization and consistent mixture strength. The automatic regulation of the choke size, combined with a tapered needle controlling the fuel jet area, allows for optimal engine performance across a wide range of speeds and power demands. The carburetor body is the core component, and this particular unit, AUC1300, is noted for its specific role within the HS4 configuration. While the exact year and model fitment are not exhaustively detailed, its association with classic MG vehicles suggests compatibility with specific engine configurations from that era. Buyers should verify exact fitment for their particular vehicle. The product comes with a 60-day manufacturer's warranty.