Spark Plugs - Yamaha F100A Wartungshandbuch

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ELEC
IGNITION SYSTEM
4. Measure:
Rectifier output peak voltage
Measure with the rectifier/regulator
output wire (red) disconnected.
Above specification → Normal
Below specification → Measure the
lighting coil output peak voltage.
Replace the rectifier/regulator.
Rectifier output peak voltage:
Red (R) – Black (B)
14 V at 1,500 r/min
18 V at 3,500 r/min

SPARK PLUGS

Refer to "GENERAL" in chapter 3.
SPARK PLUG LEAD ASSY.
1. Inspect:
Spark plug cap
Spark plug lead
Cracks/damage → Replace.
2. Measure:
Spark plug lead assy. resistance
Out of specification → Replace.
Spark plug lead assy. resistance:
#1: 4.5 ~ 10.7 kΩ
#2: 3.3 ~ 8.0 kΩ
#3: 3.7 ~ 8.9 kΩ
#4: 4.3 ~ 10.2 k Ω
NOTE:
Remove the spark plug lead assy. from the
ignition coil.
8-12
E