2007 Arctic Cat DVX/Utility 250 ATV Service Manual, Page 138Get this manual
Engine Problem: Engine will not start or is hard to start (Compression too low) Condition Remedy
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Valve clearance out of adjustment Valve guides wornseated poorly Valves mistimed Piston rings worn excessively Cylinder bore worn Spark plug seating poorly Starter motor cranks too slowlydoes not turn
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Adjust clearance Repairreplace guides Adjust valve timing Replace rings Replace cylinder Tighten plug See Electrical in this section
Problem: Engine will not start or is hard to start (No spark) Condition Remedy
Spark plug fouled Spark plug wet Magneto defective CDI unit defective Ignition coil defective High-tension lead openshorted
Cleanreplace plug Cleandry plug Replace magneto Replace CDI unit Replace ignition coil Replace high tension lead
Problem: Engine will not start or is hard to start (No fuel reaching the carburetor) Condition Remedy
Gas tank vent hose obstructed Carburetor inlet needle defective Fuel hose obstructed Fuel screens obstructed
Clean vent hose Replace needle Cleanreplace hose Cleanreplace inlet screenvalve screen