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Ignition coil resistance
1. Measure the primary coil resistance.
2. Replace the ignition coil if out of specifi-
cation.
3. Measure the secondary coil resistance.
4. Replace the ignition coil if out of specifi-
cation.
CDI unit
CDI unit output peak voltage
1. Measure the CDI unit output peak volt-
age.
2. Measure the CDI unit resistance and
charge coil output peak voltage if below
specification.
TIP:
To crank the engine, connect the engine
shut-off cord to the engine shut-off switch,
and then push the engine start switch and
engine stop switch simultaneously.
CDI unit resistance
1. Measure the CDI unit resistance.
2. Replace the CDI unit if out of specifica-
tion.
Ignition tester (Spark gap tester):
90890-06754
Primary coil resistance at 20 °C (68 °F)
(reference data):
Connector – Connector
0.078–0.106 Ω
Secondary coil resistance at 20 °C (68 °F)
(reference data):
Spark plug cap – Spark plug cap
14.336–30.464 kΩ
CDI unit output peak voltage:
Orange (O) – Black (B)
r/min
Loaded
Cranking 1500 3500
V 10 200 130
B
O
B
O
B
Electrical analysis / Ignition system
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