o carbureter air intake. This can be done by loosening the
wing nut holding the warm air elbow "F" on the stove and also loosening
the set screw holding this elbow in the air intake of carbureter, after
which slide elbow out of air intake and revolve it--180 degrees about an
horizontal axis and re-insert in carbureter air intake and lock in place
with set screw. The opening in the elbow now is turned down away from
the stove and draws in only cold air.

The above procedure, it must be understood, will vary somewhat due to
differences in locality, altitude and fuels used, but it should be borne
in mind that the best economy can be had with cold air passing to the
carbureter, and the stove should not be connected until the acceleration
and performance of the job requires the use of warm air for the best
results.

The adjustment of the carbureter should be made per the above
description of the stove, as the latter is used for meeting weather
conditions and should be set as described.

HEAT CONTROL--CARBURETER JACKETS

The carbureter and manifolds have been designed to utilize the exhaust
gases of the engine to insure complete vaporization and a consequent
minimum consumption of fuel. This is accomplished by surrounding the
upper portion of the mixing chamber with a large heat jacket provided
with an inlet and an outlet opening and connected by means of tubes to
an exhaust manifold valve body in the exhaust pipe of the engine; this
valve body, housing a large valve called the main-exhaust-heat-valve
("C" in cut) within the body itself, the return or outlet tube from the
carbureter heat jacket entering the valve-body in the lower portion
below the main-exhaust-heat-valve.

The main-exhaust-heat-valve "C" is connected by means of a lever and
long connecting rod to the throttle lever of the carbureter so that when
the throttle valve is operated the main-exhaust-valve is operated
simultaneously with it.

The purpose of the carbureter heat jacket and valve in exhaust line with
connections described, is to provide means for utilizing the heat of the
exhaust gases of the motor for vaporization of the fuel supplied the
engine by the carbureter and to do so automatically. The automatic
feature of same is accomplished by setting the Main-Exhaust-Heat-Valve
"C" by means of the long connecting rod, in closed position with the
closed or idling position of the throttle valve, thus providing for and
causing all of the exhaust gas