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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
1-17
Symptom
Fuel reaches
carburetor
Spark jumps
Weak or no spark
Normal
compression
Engine does not
fire
Dry spark plug
Fuel does not
reach carburetor
Low or no
compression
Engine fires but
does not start
Wet spark plug
GRAND DINK 250
Probable Cause
Empty fuel tank
Clogged carburetor fuel inlet
tube, vacuum tube or fuel tube
Clogged auto fuel valve
Clogged float oil passage
Clogged fuel tank cap
breather hole
Clogged fuel strainer
Clogged fuel filter
Faulty fuel pump
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
Starter motor idles but
crankshaft does not rotate
Valve clearance too small
Improper valve and seat contact
Worn cylinder and piston rings
Blown cylinder head gasket
Flaws in cylinder head
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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Troubleshooting

   Also See for KYMCO GRAND DINK 250

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