3. TROUBLESHOOTING
3.1 General symptoms and possible causes
Engine does
not start or
hard starting
Engine speed
does not
stabilize, too
high or too low
Fuel filter clogged
Fuel tank tube clogged
Fuel switch clogged
Carburetor faulty
Ignition coil faulty
Spark plug faulty
Trigger faulty or trigger clearance
faulty
Spark plug cap loose.
Low oil alarm faulty
Igniter faulty
Ignition winding faulty
Throttle opening fault
Carburetor faulty
Throttle control motor (stepping
motor) faulty
Inverter unit faulty
Valve clearance misadjusted
Clean
Clean
Clean
Clean or replace
Inspect and replace
Inspect and replace
Inspect and replace
Install securely
Inspect and replace
Inspect and replace
Inspect and replace
Set in fully closed or half closed position
Clean or replace
Inspect and replace
Inspect and replace
Readjust
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