No Spark At Spark Plug - KYMCO MXU 150 Service Manual

1
. GENERAL INFORMATION

NO SPARK AT SPARK PLUG

Inspection/Adjustment
Replace with a new
spark plug and inspect
again
Check spark plug cap
and high-tension wire
for looseness
Check CDI unit coupler
for looseness
Measure resistance
between terminals of
CDI unit coupler
Check related parts
Check CDI unit with a
CDI unit tester
Check ignition coil with
a CDI unit tester
1-37
Symptom
Weak or no spark
Not loose
Good
Normal
Normal
Normal
Abnormal
Good spark
Faulty spark plug
Loose spark plug cap
Loose
Good Poorly connected coupler
Abnormal
Faulty ignition switch
Weak battery
Abnormal
Faulty pulser coil
Faulty ignition coil
Faulty charging system
Broken wire harness
Poorly connected coupler
Faulty CDI unit
Abnormal
Faulty change gear control
unit
Faulty ignition coil
ATV 150/125
Probable Cause