9.14
ELECTRICAL
Condition: No spark or intermittent spark.
IGNITION SYSTEM TROUBLESHOOTING
No Spark, Weak or Intermittent Spark
• No12 volt power or ground to CDI
• Spark plug gap incorrect
Verify 12 Volt DC power is present on the wire to CDI. Replace Spark Plug.
Disconnect the BLACK wire at the CDI
module to isolate the ignition from the
over-ride systems, but verify the CDI has a
Verify that a minimum of 10.5 VDC is getting to
the CDI module during cranking. Refer to the
wiring schematic for connections and specifica-
tions. Compare results to the specifications on
the exploded views. Are all within specifications?
Check coil ground connection between BROWN and coil
mount using an ohmmeter. The coil mount should
have good continuity to ground (0-.2 Ω
).
Disconnect and check the secondary coil. Resis-
tance values should be:
Primary Side
- Primary Wire Tab to Ground
(on coil mount or engine): .21 Ohms
Secondary Side
High Tension Wire to engine
ground- Cap installed - 8,200Ω
Cap removed - 3,200Ω
Are these values within specs?
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.
-Test the ignition switch, engine stop
switch, and speed limiter circuit for
shorts to ground.
- Check connectors for moisture,
wire color matching or corrosion.
Inspect battery condition, connec-
tors, wiring and grounds to the
component in question. Replace
the component if a wiring problem
Clean coil mounting area.
Repair ground wire connections.
Replace the ignition coil.
No
Yes
Yes
Yes
Yes
No
No
No
good ground (BROWN) for operation.
Does it have spark?
cannot be found.
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