The Sunday telegram. [volume] (Clarksburg, W. Va.) 1914-1927, 1915-09-26

~ III ftfxD y uANo. HeDuS RHyttn0 one 2Al-
y lon ct eoal oil 20 ten2of gasoline in my
y kaHk and hnvs found II satisfactory, but
eeuld th1t be the cause Of the large
amount 81 carbon in my ensinsi Ths
earbureter q sufiiei9ntIy heated BY the
hot air from the exhaust, and gthS in
take manifold becomes 10 hot. that Il
cannot b touched. Thers issa knock
IN each cylinder. when thsl snsiues pulls
Z, hard with spark aavaneed.
Yon are driving with the spark ad-
yanced too far Any motor willsknocK
when pulling hard With the spark ad.
vanced, as you have stated. The spark
lever should 30 retarded as the throt-
tie Is opened. But only enough to stop
the motor knocking. II. you will ex-
anime the interior OF your motor you
win probably hnd that there Is moi
enough carbon to cause a knock. we
would not advise mixing gasoline and
kerosene; you are likely 70 have yapor-
King troubles, asAthe kerosene is liable
20 be left in the Garburetor. The kero.
sene will not yaporiza AS readily az
the gasoline and in aSshort time your
doat chamber VIII be full of kerosene,
and then the motor win be obliged to
run on the latter antil the aoat cham.
Der IS emptied. when It will be filed
with The Tmixed fuel and the cycle will
be repeated. This vafiation In the quail
ity Of the fuel win result In poor car
butetion. The saving that results from
adding such q small percentage 6f kero.
sene Is not sufficient to make 1t worth
the trouble: IS
Ny motor runs evenly when running
empty, but when pulling along on high
epeed, with che motor throttled down,
the front cylinder misses. . have done
essrythins ] know of TO correct this.
Can you sussest sancethins7
provided you are certain that at is
! the front cylinder, we would advise
( making a. thorough inspection Of the
ignition. Examine the spark plug for
small cracks and see that tho points
are about one-thirty- second inch apart.
Lock oversthe wiring to this plug once
more for bare Insulation and inspect
the diner to see that proper contact is
made. See that there are no air leaks
around the manifold connection and be
sure that the valves re'not warped.
have troubio Ia short eireuitina. 4
have put on an all new magnetic cable,
but Il goes through anywhere it hap
pens 20 touch any metal. Can't be that
the nasnetoiis too strens2
The probable reason for the current
ieaking 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
- prcperlysin place.
~ q can OF gasoline 10 exposed to the
air long enough for a noticeable part Of
Il 20 svapprate will the remaining gas
oline be any weaker than II was at
iirstf.e, 10 "a
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.
nnins about the same, It lis harder to
start "a motor with It. Gasoline Is Il,
mixtureHof assgreat many petroleum,
oils differing slightly in their specific
gravity. and when this mixture Is sal-
lowed to eyaporate slowly a greater
proportion OF the light oils Is taken up
by the atmosphere. and thus what 81
left Becomes heavier and heavier. and
as the specific gravity increases 1t
4 makes starting harder. s'ss
10 there such thing az high com.
prsssien or low compression meteor?
lf 30, what 10 the advantage Of q low
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
compression of over seventy pounds
are generally considered to have high
compression and engines with less than
y Afty:fve pounds low compression. Yet
the terms are purely relative and have
no exact meaning. "A lowscompression
motor wfllrun slower and more smooth.
IL at slow speed than high compress.
. sion one. 1t is not so likely to knock
when the cylinders are cafbonizcd. nor
viii It oyerheat so readily. Tie pres.
sures generated are not as great. and
therefore the>parts do not need to be
Inada 10 strong. The high Compression
engine, on the other hand, Is more EN-.
Client and develops a greater power for
q given piston displacement.
Ny car eannotsso up any kind Of a
Grade on high. After getting Il al evsr-
hauled the came .troubIs ,is found. Some
eeopi6 claim The spray nozzle IN the
5 cnrbureter is at fault. What do you
think Il can be?
: The size Of the fuel nozzle on the
: earburetot seems to be incorrect. md
q 81 yon will.ngetl into communication
with the makers Of the-car,nretor they
WI no doubt correct it for .xoti An.
ktiier possibility is that the spark plug
points are spread too far apart and
Tou are not getting good ignition al
low speeds. The probabilities are.
however, that nj the trouble Is in the
= [arhffnafNr Tho at,ark Mrs, ,,,....a