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 not
fire
Weak or no spark
Low or no
compression
Engine fires but
does not start
Test cylinder
compression
Start engine by follow-
ing normal starting
procedure
Remove spark plug and
inspect again
Symptom
Fuel reaches
carburetor
Fuel does not
reach carburetor
Wet spark plug
Dry spark plug
Summary of Contents for KXR 250
Page 21: ...1 GENERAL INFORMATION 1 19 Mongoose KXR 250 WIRING DIAGRAM OFF ROAD...
Page 22: ...1 GENERAL INFORMATION 1 20 Mongoose KXR 250 WIRING DIAGRAM ON ROAD...
Page 30: ...2 FRAME COVERS EXHAUST MUFFLER 2 1 Mongoose KXR 250...
Page 66: ...5 FUEL SYSTEM 5 1 Mongoose KXR 250...
Page 85: ...6 ENGINE REMOVAL INSTALLATION 6 7 Mongoose KXR 250...
Page 87: ...7 CYLINDER HEAD VALVES 7 1 Mongoose KXR 250...
Page 100: ...8 CYLINDER PISTON 8 1 Mongoose KXR 250...
Page 109: ...9 DRIVE AND DRIVEN PULLEYS 9 1 Mongoose KXR 250...
Page 123: ...10 FINAL REDUCTION TRANSMISSION SYSTEM 10 1 Mongoose KXR 250...
Page 136: ...11 CRANKCASE CRANKSHAFT BALANCE SHAFT 11 1 Mongoose KXR 250...
Page 156: ...13 BRAKE SYSTEM 13 1 Mongoose KXR 250...
Page 175: ...14 FRONT WHEEL FRONT SUSPENSION STEERING SYSTEM 14 1 Mongoose KXR 250...
Page 194: ...15 REAR WHEEL AXLE SUSPENSION 15 1 Mongoose KXR 250...