Troubleshooting - KYMCO MOVIE 125 Manual

1
. GENERAL INFORMATION

TROUBLESHOOTING

ENGINE WILL NOT START OR IS HARD TO START
Inspection/Adjustment
Check if fuel reaches
carburetor by
loosening drain screw
Remove spark plug
and install it into
spark plug cap to test
spark by connecting it
to engine ground
Test cylinder
compression
Start engine by follow-
ing normal starting
procedure
Remove spark plug and
inspect again
Symptom
Fuel reaches
carburetor
Spark jumps
Normal
compression
Engine does not
fire
Dry spark plug
Fuel does not
reach carburetor
Weak or no spark
Low or no
compression
Engine fires but
does not start
Wet spark plug
Probable Cause
Empty fuel tank
Clogged fuel line between fuel
tank and carburetor
Clogged float oil passage
Clogged fuel tank cap breather
hole
Clogged fuel filter
Clogged fuel strainer
valve
Faulty auto fuel
Faulty charging system
Faulty spark plug
Fouled spark plug
Faulty CDI unit
Faulty pulser coil
Broken or shorted ignition coil
Broken or shorted exciter coil
Faulty ignition switch
Weak or dead battery
Faulty starter clutch
Valve clearance too small
Improper valve and seat contact
Worn cylinder, piston and piston
rings
Leaking cylinder head gasket
Seized valve
Improper valve timing
Faulty auto bystarter
Air leaking through intake
pipe
Incorrect ignition timing
Incorrectly adjusted pilot screw
Flooded carburetor
Faulty auto bystarter
Throttle valve excessively
open
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