Electrical System; Spark Plugs - Chevrolet Fleetmaster Series 1947 Owner's Manual

The freezing point of a solution containing both alcohol and
ethylene glycol cannot be determined accurately by means of
a hydrometer.
ELECTRICAL SYSTEM
The electrical system consists of the following units: generator,
voltage and current regulator, starting motor, distributor, ignition
coil, wiring harness, storage battery, ammeter, gasoline gauge,
two horris, ignition lock, lighting, and foot control switch.
SPARK PLUGS
Your car is equipped with
"AC"
Spark Plugs having 10 milli-
meter threads. These plugs warm up fast after starting the engine
but operate cooler at full throttle. This plug reduces the possi-
bility of the formation of oxide deposits when gasolines to which
lead has been added are used.
Because of the smaller size, care must be used when removing
and installing plugs to prevent thread stripping or insulator
breakage. Thumb and finger pressure on the handle of the spark
plug wrench is sufficient for proper tightening.
In order to secure maximum life and performance in these
plugs, it is recommended that
they be thoroughly cleaned
every 3000 to 4000 miles in
order to remove oxide deposits
which form on the porcelain.
The correct gap setting is
.040".
BATTERY
"The storage battery is lo-
cated on the right side o f the
engine compartment just
ahead of the dash.
Fig. 31-Battery in Location
The battery solution level
should be maintained at
X"
above the plates by adding distilled
water. In warm weather it makes no difference when water is
added but in freezing weather it should be added just before using
the car. The reason is that water will remain on top of the solution
until it is mixed with it, by action of the battery. If not mixed with
thirty-two