KYMCO Mongoose/KXR 250 User Manual

1. GENERAL INFORMATION
1-21
Mongoose/KXR 250
TROUBLESHOOTING
ENGINE WILL NOT START OR IS HARD TO START
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 valve passage
Faulty spark plug
Fouled spark plug
Faulty ignition unit
Faulty change gear control 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
Valve stuck open
Worn cylinder, piston and piston
rings
Leaking cylinder head gasket
Air leaking through intake pipe
Leaking intake manifold
Incorrect ignition timing
Incorrectly adjusted air screw
Flooded carburetor
Clogged air cleaner
Throttle valve excessively open
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
Probable Cause
Spark jumps
Normal
compression
Engine does no
t
fire
Weak or no spark
Low or no
compression
Engine fires bu
t
does not start
Test cylinde
r
compression
Start engine by follow-
ing normal starting
p
rocedure
Remove spark plug and
inspect again
Symptom
Fuel reaches
carburetor
Fuel does no
t
reach carburetor
Wet spark plug
Dry spark plug

KYMCO Mongoose/KXR 250 Specifications

General

Brand	KYMCO
Model	Mongoose/KXR 250
Category	Offroad Vehicle
Language	English