Bulletin 9D-6 August. 1951 Model
"B" Page 4
ROCHESTER PRODUCTS DIVISION, GENERAL MOTORS CORP., ROCHESTER,
NEW YORK
The increased pressure from the
percolation in conventional units often times forces the fuel from the
pump system into the engine.
The new carburetor has a ball
type check valve built into the plunger head. As a consequence, any fuel
percolation in the pump system by-passes the ball and allows the fuel to
circulate back into the float bowl rather than into the
engine.
SERVICE FEATURES
To the service mechanic a unit
which can be serviced quickly and economically is advantageous to
both the customer and himself. The Model "B" Carburetor has been designed
with simplicity of construction and a maximum ease of
service.
In this new carburetor both the
Idle Tube and Pump Jet are pressed into the Cover Passage at the factory
and need never be replaced or serviced.
Clean to the eye and clean for
service is the external view of the Model "B" Carburetor, for there are no
external rods to adjust, bend or become distorted.
In many instances, the entire
unit will not have to be removed from the engine. All of the main metering
parts are in the Cover Assembly. By the simple removal of the four cover
screws, it is possible to service or inspect the Float, Float Valve
Assembly, Main Well Support Assembly and the Power Valve
Assembly.
Adjustments require time, both
for the customer and the mechanic. The new Model "B" Carburetor with its
fixed type main metering jet does not require any adjustments for the part
throttle or power mixtures.
Since Carburetion is dependent
upon both compression and ignition, the carburetor should always be
adjusted last in engine tune-up. The fuel systems within the carburetor
are basically simple and can be readily traced and
understood.
