Ignition System Installation; Ignition System Operating Points; Ignition System Reference Standard; Ignition System Troubleshooting - Linhai 2004 ATV 260 Service Manual

CHAPTER 3B ENGINE 50cc/80cc
3.11 IGNITION SYSTEM
3.11.1 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 Maximum advance in "F" position
Ignition coil resistance(20℃)
Pickup coil resistance(20℃)
Primary Ignition coil peak voltage
Pickup coil peak voltage
3.11.2 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
High Tension Voltage Intermittent
● Faulty main switch
● Poor CDI terminal connection
● Poor CDI ground
● Faulty pickup coil
● Poor high tension lead terminal connection
● Faulty CDI unit
High Tension Voltage Normal but No Spark
● Faulty spark plug
● Faulty spark plug cap
No High Tension Voltage
item
Primary coil
Secondary With cap
Without cap
ATV SERVICE MANUAL09.0
Standard value
(NGK)C7HSA
(LD)A7TC
0.6-0.7mm
13°±1°(1500r/min)
0.1-1.0Ω
7-9kΩ
3-4kΩ
80-160Ω
Over 120V
Over 2.1V
CHAPTER 3B ENGINE PAGE 3B - 70 -