Troubleshooting - KYMCO People Service 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
Fuel does not
carburetor reach carburetor
Spark jumps Weak or no spark
Normal
compression
Engine does not Engine fires but
fire does not start
Wet spark plug
Dry spark plug
PEOPLE/PEOPLE S 250
Probable Cause
cEmpty fuel tank
dClogged carburetor fuel inlet
tube, vacuum tube or fuel tube
eClogged auto fuel valve
fClogged float oil passage
gClogged fuel tank cap
breather hole
hClogged fuel strainer
iClogged fuel filter
jFaulty fuel pump
cFaulty spark plug
dFouled spark plug
eFaulty ignition unit
fFaulty A.C. generator
gBroken or shorted ignition coil
hBroken or shorted exciter coil
iFaulty ignition switch
cStarter motor idles but
crankshaft does not rotate
dValve clearance too small
eImproper valve and seat contact
Low or no
fWorn cylinder and piston rings
compression
gBlown cylinder head gasket
hFlaws in cylinder head
iSeized valve
jImproper valve timing
cFaulty auto bystarter
dAir leaking through intake pipe
eIncorrect ignition timing
fIncorrectly adjusted pilot screw
cFlooded carburetor
dFaulty auto bystarter
eThrottle valve excessively
open
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