KYMCO Mongoose 50-4T

1. GENERAL INFORMATION
1-33
NO SPARK AT SPARK PLUG
Faulty spark plug
Loose spark plug cap
Poorly connected coupler
Faulty ignition switch
Weak battery
Faulty pulser coil
Faulty ignition coil
Faulty charging system
Broken wire harness
Poorly connected coupler
Faulty CDI unit
Faulty ignition coil
Replace with a new
spark plug and inspect
a
g
ain
Check CDI unit coupler
for looseness
Inspection/Adjustment Symptom
Probable Cause
Normal
Abnormal
Normal
Abnormal
Normal
Abnormal
Abnormal
Measure resistance
between terminals of
CDI unit cou
p
le
r
Check related parts
Check ignition coil with
a CDI unit tester
Weak or no spark
Not loose
Good spark
Loose
Good
Good
Check spark plug cap
and high-tension wire
for looseness
Check CDI unit with a
CDI unit tester