Evening times-Republican. [volume] (Marshalltown, Iowa) 1890-1923, 1920-12-22

lene to be converted into vapor and
mixed with air before 1t can be used
In the automobile engine?
1t is necessary for gasolene to be
! converted into vapor and mixed with
| air before it is drawn ipto the engine
for combustion because pure gaso-
| lene will not burn in the cylinders.
Nor Will gasolene vapor burn. unless
it is mixed with quantity OF air
considerably greater than the amount
OF gasolene used for each charge
Therefore, carburetion Is one OF the
main factors In engine operation.
2.-what Is the simple way to dis
cover a compression leak in spark
plug?
To locate leak OF compression in
a spark plug, pour a small amount
Of gasolene or oil around the bottom
OF the exposed Dart Of the porcelain
or where It energies from the shell
OF the plug. Bubbling will be noticed
II the plug leaks. Make tho expert
ment while the engine is in operation.
3,--what is the simplest test OF an
ignition coil?
One way to test the ignition coil
is to place an name card or piece
Of heavy paper between tho points OF
spark plug grounded to the engine
and with wire connected. Turn on
the ignition switch and revolve the
engine until spark occurs at the
nj, fcfr ch
be especially in cold weather the
spark will punch hole thru the
paper between the points.
An addition to q very lean car
buretor mixture what Will cause an
engine to back fire?
In addition weak carburetor mix
ture. back firing may be caused by
the ignition not being timed correctly
and causing spark to occur during
an intake stroke OF piston. valves
out of time so that an inlet valve is
open when an explosion occurs. pre-
ignition and very late combustion
caused by retarded or weak spark.
5.-Whut are the usual causes OF
an engine overheating?
Not enough oil OF a poor grade o.
oil in the crank case. poor compression
laboring Of tho engine on hard pulls.
lack OF water In the cooling system
wrong timing of spark. retarded
spark with too rich carburetor mix
ture, lubricating system clogged or
clogged exhaust are all causes most
commonly due to overheating Of an
engine.
6.--Can old motor oil drained from
the crankcase be used again as q
lubricant for the car?
Motor oil which has been used in
the crank case for about thousand
miles may be drained and purified by
altering and again used to lubricate
the transmission or diiferentials If
1t is mixed with grease. to the heavy
consistency necessary. The oil taken
from the crank-case Is only charred,
and contains wax which 10 neces-
sary for proper gear fabrication.
Used fabrication, oil, with a little
kerosene added makes q good oil
with which to lubricate car springs.
What may be used to clean the
cooling system OF an engine?
To clean the cooling system I've
can be used II 1t is handled properly
and not retained In the system too
long. Dissolve half pound OF lye
in Ave gallons Of water, strain thru
a cloth while pouring into the radi-
ator and run the engine four or FIVE
minutes then drain the system. When
drained. refill with clean water, run
the engine and drain again. after
which the system may be refllled
permanently with fresh water. Bak-
ing soda is also used. Dissolve a
half pound to four gallons Of water
and proceed according to above dir.
ections. The operation may be re-
peated with the soda solution II the
system requires the additional clean
ing.
S.-If the engines stalls while the
car is going UP hill and the brakes
refuse to work what may be done?
If the brakes refuse to work when
the engine Of car stalls on q hill,
either throw out the clutch and en-
gage low gear to hold the car in
position of reverse gears, and with
ignition switched on and the car