Linhai 2004 ATV 260 Service Manual page 224

CHAPTER 3C ENGINE 100/125/150/200
3.7 IGNITION SYSTEM
3.7.1 INSTALLATION INFORMATION
OPERATING POINTS
● Check ignition system in accordance with the troubleshooting procedure in section 3.11.2
● As the ignition system has an electric automatic spark control in CDI unit, there is no need
for spark advance angle adjustment.
● Poor contact may be the cause of many ignition system faulty cases. Check all terminal
connections to be sure they are clean and tight whenever troubleshooting an electrical
problem.
● Make sure spark plug heat range is correct. Using incorrect spark plug will result in
improper engine operation or spark plug damage.
● Peak voltage is used as reference point in tests. Record coil resistance tests.
REFERENCE STANDARD
Specific spark plug
spark plug gap
spark
plug
angle
Ignition
resistance(20℃)
Pickup coil resistance(20℃)
Primary Ignition coil peak voltage
Pickup coil peak voltage
3.7.2 TROUBLESHOOTING
High Tension Voltage Too Low
● Crankshaft revolution too low or battery voltage too low
● Ignition system wiring loose
● Faulty Ignition coil
● Faulty CDI unit
● Faulty pickup coil
item
Maximum advance in "F"
position
coil Primary coil
S
e
c
o
n
d
ar
y
(NGK)C7HSA
0.6-0.7mm
13°±1°(1700r/min)
0.1-1.0Ω
Wit 7-9kΩ
h
ca
p
Wit 3-4kΩ
ho
ut
ca
p
80-160Ω
Over 120V
Over 2.1V
CHAPTER 3C ENGINE
SERVICE MANUAL09.0
Standard value
PAGE.3C - 32 -