Troubleshooting; Engine Will Not Start Or Is Hard To Start - KYMCO SUPER8 50 2T Service Manual

2
. 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.
Wait for 30 minutes
and then remove the
carbu-retor auto
choke circuit hose
and blow the hose
with mouth.
2-21
Symptom
Fuel reaches Fuel does not
carburetor reach carburetor
Spark jumps
Weak or no spark
Normal
compression
Engine does not
fire
Dry spark plug
Not clogged
Low or no
compression
Engine fires but
does not start
Wet spark plug
Clogged
SUPER8 50 2T
Probable Cause
Empty fuel tank
Clogged float valve
Clogged charcoal canister
Clogged fuel filter
Faulty auto fuel valve
Faulty spark plug
Fouled spark plug
Faulty CDI unit
Faulty A.C. generator
Broken or shorted ignition
coil
Broken or shorted exciter
coil
Faulty ignition switch
Burned or worn cylinder
piston
Faulty reed valve
Blown cylinder head gasket
Leaking crankcase
Faulty crankcase oil seal
Incorrectly adjusted idle
speed
Air leaking through intake
pipe
Incorrect ignition timing
Flooded carburetor
Throttle valve excessively
open
Faulty auto bystarter