AISAN 2-Barrel -- TOYOTA 2F Engine: Description

Carburetor is a 2-barrel, down draft type with vacuum operated choke breaker to improve cold engine operation. A secondary slow port helps fuel mixing at start of secondary valve opening. Improvement of operation is noticed during low speed load. A piston type accelerator pump is incorporated into the primary barrel.

Other equipment includes a diaphragm to open secondary valve at high speed and full throttle operation. A throttle stop solenoid is also used to prevent dieseling during engine shut down.