Tulsa daily world. [volume] (Tulsa, Indian Territory [Okla.]) 1905-1919, 1918-03-03


alone" Some oatbuetors which
have an automatic auxiliary air
valve. which valve Ia held against ~
scat by q light spring. will allow the
miNtdfO 10 become weaker because
the sprlnE loses It's tonH,un or
strength, Therefore. II popping
gradually develops II would bo good
TO tighten the spring II there he an
adjusting screw for this purpose, OF,
II not u make tho mixture slightly
richer before taking the feed line
apart 10 this does not remedy thn
trouble. set the adjustments back 20
whore they were
II an inlet valve leak. due 10 need
Ing grinding or not seating properly.
q spark may get past it curing tho
explosion stroke and 80 ignite the
mixture In thu inlet manifold and
thls cause popping. Popping by
the way, 10 due to the mixture IN tho
manifold iKnitlns. When tho mix
turs is weak, Il will be iglted he.
cause exhausted gases are stu
burning when tho inlet valve ~
| opened
Having determined that the
trouble u due 70 too slow a feed OF
the gasoline, let us see why the feed
can be too slow In the iliustta-
ton the simplest method OF feeding
the gasoline II shown. namely, tho
gravity aystem.
First We have the ras tank. How
can this cause failure OF tho gAEo-
line 10 feed properly OF course. II
may be empty or the gasoline may
he no low as TO have the top Of Il
lower than the gasoline In the car
buretof. The latter condition often
occurs when the car In climbing n
steep hill, when the thing 10 do iB TO
20 up the hill backward.
| Sometimes the vent hole (A IN
the filler cap will be cloggeh up.
When this happens "A partial vacuum
viii gradually form In the tank ana
20 the gasoline will he sort or held
hack II IN a good plan TO look 10
this vent hole when flllinE the tank
and make sure that Il Ia not stopped
up.
] Next TO the tank comes the valve
To proper type OF valve SHOULD have
the finger piece pointing downward
when the valve IL open, sometimes
however the finger piece IL horizon
tai, as shown at II, when the valve Il
open, When thiri is the case. ut
Eyalve may slowly close of itself 0o'
cause Of the jNS and vibration of the
bear. III little waste. etc, we.c "a
get Into the tank II probably would
he caught 10y the valvg apd No check
the flow OF Fasnline.
Next comes the tubing pedimC nj
may clog this, when u does II gen
orally will be at the bottom OF q
sharp bend. when tubing In In
stalled, core must be taken to hayt
ms few bends as possible and NJ
sharp bends.
Somewhere In the gas line ther'
usually Ia n water trep and strainof
a. @. Here will he found much oi
the feed line trouble The water
trapped here may check the flow OF
the gasoline. Th gauze strainor mGl
be ..rty. Every week or two, about
half cupful OF gasoline should he
drawn out OF this trap. IL wntcr bi
In II. II will bo the first To Grain or
Finally we tpnfe to the onrbuetoi
itself. The gnholne will enter tho
carburetor through the float valve
v, but generally must first pass th'
strainer, q. Sometimes dirt will ke
In the passea Of the float valve, ul
under the waive needle and 40 chus'
the level Of tho gasoline IN the flea
chamber 10 be too low or too high
respectively.
The float and the fioat vaiv'
mechanism DO sometimes get out o
order, but their troubles are sener
ally such as will cause the level q
be too high, and NO mixture 10 weAt
Today most cars have tho vacuum
/ feed aystern While the mechanism
sf the vacuum tank will sometime
stick or get out OF order, the troubles
of this System will generally he du'
20 air leaking Into the vacuum
chamber and no destroying tn
vacuum. when this Ia the ease. th'
tank will become dry, so that open
Ing the pet cock at bottom OF II vii
show n the troubleo Is due 10 thu
tank. N gasoline flows out Of th'
pet cock, you know the vacuum mnl
Ia o. H., while II none flows, yoI
know Il Is to blame.
Vacuum system trouble In verl
often due TO leakage In the tuh'
which runs fom the inlet manifold
to the top of the vacuum tank, or q
the cover OF the tank becomini
loose ana 50 allowing air TO leak IN
The vent hole IN the filler cap OF tn
supply tnnk mast be kept open Jus
as for tho gravity system.
The vacuum batem Ia subject Il
all of the troubles OF the gravlt,
system in addition TO those peculin.
t1 itself. The same is true OF tn
pressure feed system.
The pressure feed system. fast he
coming obsolete. IL subject 10 al
annoying loss OF pressure. This ma
be due 10 leakage at the hand pump
failure or leakage al the powe
pump. leakage at the tubes the file
cap or tho gauge which shows hov
much gasoline is In the tank Leak
age at the filler cap is found tn
MOST often.
Cotton plays n large part IN M
manufacture of tires for the basil