at is required in the reduction of the
volume of heat together with driving on "Cold" air for the
main-air-supply, in the warmest weather or hottest climates.

[Illustration: HEAT SETTING No. 2]

NOTE--After original position of valve "C" is made as described in "Heat
Setting No. 1" do not again readjust valve "C" on connecting rod but
when changing from "Heat Setting No. 1" to "Heat Setting No. 2," merely
change position of long connecting rod from "Hole No. 1" to "Hole No. 2"
in throttle lever.

ADJUSTMENT

No change should be made in the carbureter adjustments until after an
inspection has been made to determine if the trouble is in some other
unit. It should be noted that the gasoline lines are clear, that there
is gasoline in the vacuum tank, that there are no leaks at connections
between carbureter and engine, that the ignition system is in proper
condition, and that there is even compression in all cylinders.

If it is necessary to test adjustment or to make a readjustment proceed
as follows:

Set air screw so that the end is flush with the end of ratchet set
spring. Loosen packing nut on needle adjustment. Turn gasoline
adjustment to the right very carefully so as not to injure the needle
point, until the valve is closed gently against its seat. Then turn to
left approximately one complete turn which will bring notch in the disc
handle directly below the guide post above it. Tighten packing nut to
hold needle firmly as set.

The notch in disc handle of needle is put in handle after the needle has
been carefully calibrated by a flow-meter at the factory, therefore the
notch in handle should register with guide post above it. This setting
of needle valve is absolutely essential to get the best results. The
object in directing that needle be first turned to the right until
closed is to insure against two or more turns open, as from closed
position to notch (usually about one turn) is the normal setting. This
being true it is not necessary to turn needle in to the right firmly but
merely far enough to be sure that when turning back to the left, to the
notch registering with guide post, that the needle is not more than once
around or one turn from its seat.

Set stove heat and damper heat as previously instructed above. Pull out
choker to closed position and start engine in usual manner. As soon as
engine has fired release choker three-fourths of way in. Run until
engine has warmed up then push choker a