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u. Disconnect primary leads from terminals on top of ignition coils.
Pull
high tension leads from ignition coils (see Figure 7-15).
Loosen ignition coil clamp screw to remove ignition coils.
TESTING
For conclusive testing, the ignition coils should be removed. See
Fig. 7-15. The breaker pOint assembly, condenser, and magneto drive
and alternator coils, however, are tested in position and are removed
only
for replacement.
FLYWHEEL
Check charge polarity with a compass. Compass arrow should point
in direction of arrow on flywheel.
BREAKER POINTS
Breaker pOints can now be inspected and replaced if necessary. Under
normal running conditions, breaker point contacts will appear slightly
rough and gray in color. Abnormal pOints will appear excessively
pitted, and may have a conSiderable amount of material transferred
from one contact surface to the other, and will generally be blue
in
color.
Severe pitting, burning, or bluing can usually be traced to such condi-
tions as a faulty condenser, or deposits of foreign material, especially
grease or oil, on the contact surfaces. Faulty condensers require re-
placement. Foreign deposits can be attributed to careless handling of
pOints during installation, use of excessive lubricant on the oiler wick,
or a leaky front crankcase seal.
Wipe breaker point post clean before installing new breaker pOints to
ensure a clean surface for the breaker point bushing
to
pivot on (see
Figure 7-16). Turn the eccentric adjusting screw
into
the plate until it
bottoms so that there is adequate screw engagement to hold breaker
point gap of
.020
for used points in good condition or .022 for new points.
Set pOints on highest point of cam lobe.
Breaker point spring tension is predetermined and does not require
adjustment.
Dirt, foreign particles, and oil are detrimental to
contact
perform-
ance. The
oils
and acids from a person's hand, even though clean, can
affect contact resistance. Oil deposits on the points will cause them to
burn after a very short period of operation.
If
points need cleaning,
saturate.
a piece of bias tape in alcohol or trichlorethylene and work it
up and down between the points.
Finish
with a clean, dry piece of hard
finish paper card stock to remove any reSidue which might cause point
burning. NOTE:
If
pOints cannot be cleaned satisfactorily by this
method, replace them. DO NOT use an abrasive stone or file to remove
reSidue across new or old breaker contacts.
If
new breaker points
have high resistance across their contact surfaces, making use of a
continuity meter during breaker point adjustment difficult, snap the con-
tacts open and closed manually several times.
CONDENSER
The following four factors affect condenser performance; each factor
must be considered in making a complete condenser test.
7-5
Figure 7-15
Figure 7-16
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