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Summary
1.
High Voltage Output Test
A.
For safety purposes, put back of the
machine on a test stand so that the track
does not contact the ground.
B. Connect red lead of tester to the red and
white wire in triple plug. Connect the
yellow lead of tester to the black/red wire
in triple plug.
C. Set tester on 85 low scale. Crank the
engine over quickly.
B. Remove resistor cap and spark plug from
NO.2 cylinder.
C. Replace cap and spark plug with non-
resistor components.
O. Connect MM-1 adaptor to NO.2 spark
plug wire just behind cap.
E. Connect red lead of tester to clip of MM-1
adaptor.
F. Connect yellow lead of tester to a good
ground on the engine.
G. Set the tester on 80 high scale.
H. Crank the engine over quickly. Repeat
test 3 times. Push reset button between
each test.
2.
COl Output Test
A. Disconnect double plug connector be-
tween COl unit and external coil.
5.
O. Light must illuminate. Repeat test 3 times.
Lighting Coil Output Test
A. Be sure machine is on safety stand with
track off the ground.
B. Disconnect yellow wires coming from
magneto.
C. Connect leads of tester to the two yellow
leads from the magneto. (Does not
make any difference which of the test
leads are connected to the two yellow
magneto wires as long as one tester lead
is connected to each of the two).
D. Set tester on 80 low scale.
E. Crank the engine over quickly. Repeat
test 3 times to confirm results. Push reset
button each time.
B. Connect the yellow lead of the tester to
white and blue wire from COl unit.
C. Connect the red lead ofthetesterto black
and white wire from COl unit.
D. Set tester on 75 high scale.
E. Crank the engine over quickly. Repeat
test 3 times to confirm results. Push reset
button between each test.
3.
Charge Coil Test
A.
Disconnect triple wire plug from engine
to COl unit.
B. Connect red lead of tester to red and
white wire in triple plug connector.
C. Set tester on 65 high scale; crank the
engine over quickly.
O. Repeat test 3 times. Push reset button
between each test. If the light doesn't
illuminate, replace the charge coil.
4.
Trigger Coil Output Test
A.
Disconnect triple wire plug from engine
to COl unit.
139
Ignition Timing
1.
Using a dial indicator, find top dead center
(TOC) of the PTO side cylinder.
2.
Rotate the drive clutch clockwise 1.44 mm or
0.056 in. (corresponds to 16° BTOC).
3.
Make a reference mark on both the drive
clutch and the engine. Use this mark to check
timing.
4.
The timing can be preset during engine
repair by examining the position of ignition
components.
5.
Use the stator plate marks to preset timing.
Rotate plate in the proper direction; then
tighten screws securely.
6.
Install starter pulley.
7.
Start the engine and allow it to warm up
thoroughly. Check the timing with a timing
light. The 16° BTOC timing mark of the
flywheel must align with the boss of the
magneto housing (located under COl unit) at
6000 rpm. If the marks were made according
to step three, both marks must be aligned.
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