Tulsa daily world. [volume] (Tulsa, Indian Territory [Okla.]) 1905-1919, 1918-03-17
AUTO LESSON NO. 81.
CarburctOr Adjusting.

The carburetor. tho adjusting OF
which We will take up now. ~ the
stromborg. There are quite num-
Der OF types OF this carburstor on
the market but we will take up only
the two which are tho most used at
present. namely. the type 20, 3"
found on the larger cars, and the
type TX" found on the smaller cars
Tho cStromberR differs from most
| other earburetors, In that tho ad-
iustments are all on tho air, instead
OF on the gas spray nozzle.
Type "a" IL 4 non water iacketed
model furnished In either single or
double Jet according to motor re.
quirements,
| whenever possible install this
carburetor with float chamber to-
ward the radiator
Gasoline Adjustment
| Tho gasoline adjustment on this
chrburetor Ia set ut the factory and
never needs attention,
Air Adjustments
There Ars only two simple adjust
ments that ever need attention.
"A" the low speed nut ana IN" the
thiEh speed nut.
| With the motor at rest set the
high speed nut III" 40 there is at
least l-ts OF an inch clearance be-
tween the spring 20" and the nut
"N' above II. This IN imperative.
Set the low speed nut "a" 40 the
air valve "E" is seated lightly.
To start the Motor
start the motor, first closing the
choker valve "R" IN the air valve by
the control provided. Opcn this az
soon as motor starts and keep open
while motor IL running II motor
does not start on the third or fourth
turn Of the crank open this valve
and motor should then run,
Low Speed,
DO not adjust cnrburetor until
motor IL thoroughly warmed up
When motor IL warm and with spark
retarded adjust "A" up or down un
III motor runs smoothly at low
speed, To determine proper adjust
ment oWen the air valve with fin
ger ny depressing ~" slightly H.
when 30 DOING. motor speeds up no.
ticeably II indicates too rich mix.
ture and a" shoull be turned down
notch hy notch II on the othc,
hand. motor dies suddenly when
slightly opening tho air valve It in,
dicates too lean mtSture and "A"
should 'bo turned UP until this is
,vetcome.
once properly set for idiing DO not
ehanse this adjustment when max
ing the high sneea adjustment.
High speed.
Advance the spark 10 the nal
position and open tho throttle Grad.
ually II motor bRckfires thru the
carburetor II l. positive indlcn
ton Of too lean a mixture and nut
'B" should he turned up notch by
notch until this IL overcome.
II mixture II too rich as IndlcA ted
by a loading Of the motor and heavy
MACK smoke from the exhaust turn
,"B" down until motor operates pron
erly A further test for the correct
mixture at hleh speed can he made
hy depressing the air valve when the
motor is running At this speed N
when 20 doing motor speeds up II
Indicates too rich mixture II mo-
tor runs slower too lean a mixture
Turning either adjusting nut nm
means richer mixture OF more gas
Down means a leaner mixture or
more air
To get highest efficiency from thia
cArburctor hot air equipment should
he used.
When this carhurctor is furnished
hv the makers Of the car tho norzles
VIII be right and you should not
change them. ~ however some other
make NJ carburetor was replaand nv
ihis ono, the noszles may be wtorr.
iand the following IL given for this
case Changing the nozzles ON.
cNrburetors furnished nv the car
makers Il "A htI mistake often made
! Double Jet Type.
II. after following tho instructions
given above. and with the motor
running idle ~ Tow speed the air
valve r. remains tightly seated. n
indicates too mall primary noz-
ale 't" and "A larger one should be
substituted.
n with the proper adjustment and
after stopping the motor the air
valve "E' hangs OF the seat the pri-
lmAry nozale Is too larEe and a
smaller one should be used.
To change primary nOzzle remove
pet cock or plug at "F'' insert screw
driver and unScrew noExle
II the mixture on low speed IL cor
rect but In order TO get the proper