PRINCIPLES GASOLINE/DIESEL FUEL SYSTEMS - OD1620 - LESSON 1/TASK 2
(7) Four-Barrel Carburetor (figure 33).
venturi carburetor consists of two primary venturis on a fixed
shaft that are progressively linked to two secondary venturis that
on a fixed throttle shaft. The four-barrel carburetor is commonly
V-8 engine configurations, for the following reasons:
TYPICAL FOUR-BARREL CARBURETOR.
(b) The carburetor serves the engine better throughout the entire
load and speed range.
g. Updraft, Downdraft, and Sidedraft Carburetion (figure 34 on the
following page). Carburetors may be built so that the airflow in the throat
is downward, upward, or sideways, as shown in figure 34.
h. Primer System.
system to aid cold starting. The primer system consists of a hand pump that
forces gasoline through a line to inject it at critical locations along the