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3. Troubleshooting
This troubleshooting section contains troubleshooting trees organized by common groups of symptoms.
Some testing information is contained in these sections. The following chapters of this manual focus on
individual components and sub assemblies which will give you the assembly and reassembly
procedures along with detailed specifications and testing procedures.
3.1 General symptoms and possible causes
Engine does
not start or
hard starting
Fuel filter clogged Clean
Fuel tank tube clogged Clean
Fuel switch clogged Clean
Carburetor faulty Readjust and clean
Ignition coil faulty Inspect and replace
Spark plug faulty Inspect and replace
Trigger faulty or trigger clearance
faulty
Inspect and replace
Spark plug cap looses Fix it securely
Low oil alarm faulty Inspect and replace
Ignitor faulty Inspect and replace
Ignition winding faulty Inspect and replace
Throttle opening fault Set in fully close or half close position
Engine speed
does not
stabilize, too
high or too low
Carburetor faulty Adjust and/or disassemble and clean
Throttle control motor (stepping
motor) faulty
Inspect and replace
Inverter unit faulty Inspect and replace
Valve clearance misadjusted Readjust
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