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3. TROUBLESHOOTING
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 Clean or replace
Ignition coil faulty Inspect and replace
Spark plug faulty Inspect and replace
Trigger faulty or trigger clearance
faulty
Inspect and replace
Spark plug cap loose. Install securely
Low oil alarm faulty Inspect and replace
Igniter faulty Inspect and replace
Ignition winding faulty Inspect and replace
Throttle opening fault Set in fully closed or half closed position
Engine speed
does not
stabilize, too
high or too low
Carburetor faulty Clean or replace
Throttle control motor (stepping
motor) faulty
Inspect and replace
Inverter unit faulty Inspect and replace
Valve clearance misadjusted Readjust