The Sunday telegram. [volume] (Clarksburg, W. Va.) 1914-1927, 1915-09-12


tank and have found It satisfactory, hu,
could that be the cause Of the large
amountse f carbon in my ensine7 The
earhuretor % sufficiently heated by the
hot air from the exhaust, and the in.
take manifold beoomes. 50 hot that I.
cannot be touched. There 10 a knock
IN each cylinder when the engine pull,
hard with spark advanced.
You are driving with the spark ad.
yanced too far. Any motor viii knocl.
when pulling hard with the spark adj
vanced, as you have stated. The spark
lever should be retarded MS the throt-
Tie II opened, but only enough to stop
the motor knocking. II you will ex-
anime the interior of your motor you
win probably find that there IS NOT
enough carbon to cause knock. We
would not advise mixing gasoline and
kerosene; you are likely to have vapor-
king troubles, as the kerosene Is liable
10 be left in the carburetor. The kero-
sene will not vaporize as readily as
the gasoline and in short time your
float chamber will be full Of kerosene,
and then the motor Mill be obliged to
run on the latter unM the fioat cham
Der Is emptied. when it will be filed
with the mixed fuel and the cycle will
be repeated. This variation in the quail
fly OF the fuel will result in poor car
bureticn, The saving that results from
adding such small percentage of kero-
sene Is not sufficient to make 1t worth
the trouble.
My motor runs evenly whom running
2 empty, but when pulling along on high
speed, with the motor throttled down,
the front cylinder misses. | have done
everything ! know Of 60 correct this.
Can you suggest somethins7
Provided you are certain that 1t Is
the front cylinder, we would advise
making thorough inspection Of the
ignition. Examine the spark plug for
small cracks and see that the points
are about one-thirty inch apart
Look over the wiring to this plug once
more for bare insulation and inspect
the timer to see that proper contact is
made. See that there are no air leaks
around the manifold connection and be
sure that the valves are not warped.
lshave trouble in short eircuitins. .
have put on an all new magnetic cable,
but L goes through anywhere Il hap
pens to touch any metal. Can it be that
the magnetic 10 too strong?
The probable reason for the current
leaking is that the insulation is not
heavy enough, or It has become worn
in places where it has rubbed against
the metallic surfaces. Possibly the
leak Of current occurs at the point at
which the wires pass through the fiber
block over the exhaust manifold. 1t
would also be well to note II this block
Improperly in place.
II a can of gasoline is exposed TO the
air long enough for noticeable part of
It 20 evaporate viii the remaining gas.
oline be any weaker than il was at
frst7
When gasoline is exposed to the air
and allowed to evaporate the specific
gravity Of the remainder Of the liquid
increases, and. while the fuel value re-
mains about the same, 1t Is harder to
start motor with 1t. Gasoline is n
mixture of great many petroleum
oils differing slightly In their specific
gravity. and when this mixture is al
lowed to evaporate slowly greater
proportion of the light oils Is taken up
by the atmosphere, and thus what is
left becomes heavier and heavier, and
as the specific gravity increases It
makes starting harder.
ls there such thing as high com.
preston or low compression notor7
compression motor7
Motors have been constructed with
compression pressure varying all the
way from nothing at all up to several
hundred pounds. Roughly. motors with
q compression of over seventy pounds
are generally considered to have high
compression and engines with less than
hfty-fve pounds low compression. Yet
the terms are purely relative and have
no exact meaning. A low compression
motor will run slower and more smooth.
8lyf at slow speed than high compress
sion one. It is not so likely to knock
when the cylinders are carbonized, nor
viii 1t overhead so readily. The pres.
sures generated are not as great, and
therefore the parts do not need to be
made SO strong. The high compression
engine. on the other hand, is more eff
Client and develops greater power for
9 given piston displacement,
My car cannot go up any kind Of 1
grade on high. After getting Il all over
hauled the same trouble 10 found. Some
people claim the spray nozzle in the
earhuretor 10 at fault. What do you
think it can he7
The size of the fuel nozzle on the
carburetor seems to be Incorrect, and
if you will get into communication
with the makers Of the carburetor they
viii no doubt correct it for you. An.
other possibility is that the spark plug
points are spread too far apart and
you are not getting good ignition at
low speeds. The probabilities are.
however, that all the trouble Is in the
carburetor. The spark plug points.
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