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COl Unit Output Test
1.
Disconnect the double wire plug connecting
the COl unit to the external coil.
2.
Connect the red lead of the COl tester to the
black and white wire from the COl unit.
Connect the yellow lead of the COl tester to
the remaining blue and white wire in the plug.
Use special adaptor for making connection.
Fig.
8-26
~
~~
L
_
0725-140
3.
Set the tester selector on 80 high scale.
Grasp the recoil and crank the engine over
quickly. If the light of tester illuminates, COl
unit output is satisfactory. This also pin-
points the external coil as being defective.
and it should be replaced. Repeat the test
three times for conclusive results. If the light
fails to illuminate, proceed to testing the
charge coil and trigger coil.
Charge Coil Output Test
1.
Disconnect the triple plug connecting the
COl unit to the magneto system.
2.
Connect the red lead of the tester to the red
and white wire in the triple plug from the
magneto; then connect the other lead to a
good ground on the engine.
Fig.
8-27
0 -
0725·141
3.
Set the tester on 55 high scale. Grasp the
recoil and crank the engine over quickly. If
the tester light illuminates the charge coil
output is satisfactory. Repeat the test three
times for conclusive results. Proceed to
Trigger Coil Output Test.
141
Trigger Coil Output Test
1.
Move the switch on the tester to the LOW
position. Set the tester dial on 70.
2.
Connect the red tester lead to the red and
white wire in the triple plug from the mag-
neto; then connect the yellow lead to the
black and red wire located in the same plug.
Fig. 8-28
. : ,,,NITiON HSTlR
0725-142
3.
Grasp the recoil and crank the engine over
quickly. If the light illuminates on the tester,
the output of the trigger coil is satisfactory.
Repeat test three times for conclusive
results. If the light fails to illuminate, replace
the trigger coil.
II
NOTE: If both trigger and charge coil tests
are satisfactory and the COl Output Test is
negative, the COl unit must be replaced.
Lighting Coil Test
II
NOTE: Use steps 1-3 for resistance; steps 4-
8 for output.
1.
Disconnect the main wiring harness from the
engine connector.
2.
Connect ohmmeter to the two yellow wires in
engine connector.
3.
Meter should registerO.18 ohm if coil is good.
4.
To check voltage regulator, proceed to
Check Voltage Regulator.
5.
Disconnect the main wiring harness from the
engine.
6.
Connect the red tester lead to either of the
yellow wires located in the four-prong plug;
then connect the remaining lead to the other
yellow wire in the plug.
7.
Set tester dial on 80 with the switch in the
LOW position.
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