KYMCO MX'ER 50 - Troubleshooting

1. GENERAL INFORMATION
1-22
MX’er 50
TROUBLESHOOTING
ENGINE WILL NOT START OR IS HARD TO START
Å Empty fuel tank
Ç Clogged float valve
É Clogged charcoal
canister
Ñ Clogged fuel filter
Ö Faulty auto fuel valve
Å Faulty spark plug
Ç Fouled spark plug
É Faulty CDI unit
Ñ Faulty A.C. generator
Ö Broken or shorted
ignition coil
Ü Broken or shorted
exciter coil
áFaulty ignition switch
Å Burned or worn
cylinder piston
Ç Faulty reed valve
É Blown cylinder head
gasket
Ñ Leaking crankcase
Ö Faulty crankcase oil
seal
Å Incorrectly adjusted idle
speed
Ç Air leaking through
intake pipe
É Incorrect ignition
timing
Å Flooded carburetor
Ç Throttle valve
excessively open
Å Faulty auto bystarter
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.
Inspection/Adjustment
Symptom
Probable Cause
Fuel reaches
carburetor
Spark jumps
Dry spark plug
Not clogged
Normal
compression
Engine does not
fire
Fuel does not
reach carburetor
Weak or no spark
Wet spark plug
Clogged
Low or no
compression
Engine fires but
does not start
Test cylinder
compression.
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.
Start engine by follow-
ing normal starting
procedure.
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