Carburetor - HITACHI 2-Bbl: Description

Carburetor is a 2-barrel downdraft design with primary and secondary throttle system. A choke valve and idle circuit are used in primary system only. Both primary and secondary venturies have main fuel nozzles.

A mechanical accelerator pump and a vacuum operated power valve are used for increased fuel requirements. An anti-dieseling switch or solenoid valve is used to stop fuel flow in idle circuit (on some models) when ignition switch is turned off.

Some models use an altitude compensator device to maintain optimum air/fuel ratio at higher altitudes. The carburetor includes an air/fuel (duty) solenoid that is controlled by computer to maintain optimum air/fuel ratio, and air vent solenoid and slow fuel cut system.