2007 Arctic Cat DVX/Utility 250 ATV Service Manual, Page 142Get this manual
Electrical Problem: Spark absent or weak Condition
Ignition coil defective Spark plug defective Magneto defective CDI unit defective Pick-up coil defective
Replace ignition coil Replace plug Replace magneto Replace CDI unit Replace pick-up coil
Problem: Spark plug fouled with carbon Condition
1234567
Mixture too rich Idling RPM too high Gasoline incorrect Air cleaner element dirty Spark plug incorrect (too cold) Valve seals crackedmissing Oil rings wornbroken
1234567
Adjust carburetor Adjust carburetor Change to correct gasoline Clean element Replace plug Replace seals Replace rings
Problem: Spark plug electrodes overheat or burn Condition
Spark plug incorrect (too hot) Engine overheats Spark plug loose Mixture too lean
Replace plug Service cooling system Tighten plug Adjust carburetor