Condition: No Spark or intermittent spark
Disconnect the black wire at the CDI module
to isolate the ignition from the kill system.
Verify the CDI has a good ground (Brown)
for operation.
Does it have spark?
-Test the ignition switch, engine stop
switch, and speed limiter circuit for
shorts to ground.
-Check connectors for moisture,
wire color matching or corrosion.
Measure the resistance of the exciter coil and
pulse coil (where applicable). Refer to the wiring
schematic for meter connections and specifica-
tions. Compare results to the specifications on
the exploded views. Are all within specifications?
Inspect connectors, wiring and
grounds to the component in
question. Replace the compo-
nent if a wiring problem cannot
be found.
Yes
No
Yes
Yes
No
Check coil ground connection between engine and coil
mount using an ohmmeter. The coil mount should
have good continuity to ground on the engine (0-.2 Ω).
Replace Spark Plug
Disconnect and check the secondary coil. Resis-
tance values should be:
Primary Side
- Primary Wire Tab to Ground
(on coil mount or engine): .3 to .5 Ohms
Secondary Side
High Tension Wire to High Ten-
sion Wire-- Cap installed - 11,300Ω
Cap removed - 6300Ω
Are these values within specs?
Replace the ignition coil.
No
Yes
If all of the above tests are within specifications, and all grounds, connections, and wire color coding
have been inspected, perform voltage output tests on following page or replace the CDI module.
Clean coil mounting area.
Repair ground wire connections.
No
ELECTRICAL
10.20
IGNITION SYSTEM TESTING FLOW CHART
Whenever troubleshooting an electrical problem, first check all terminal connections to be sure they are clean
and tight. Also be sure that colors match when wires are connected
. Use the following pages as a guide for
troubleshooting. The resistance values are also given on the specification pages.
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