2010 Arctic Cat DVX 90 / 90 Utility ATV Service Manual, Page 48Get this manual
Troubleshooting Problem: Engine will not start or is hard to start (Compression too low) Condition Remedy
12345Piston rings worn excessively Cylinder bore worn Spark plug seating poorly Starter motor cranks too slowlydoes not turn Valves burnedtappets adjusted too tight 12345Replace rings Replacerebore cylinder Tighten plug See Section Replace valvesadjust tappets
Problem: Engine will not start or is hard to start (No spark) Condition Remedy
123456Spark plug fouled Spark plug wet Magneto defective CDI unit defective Ignition coil defective High-tension lead openshorted 123456Cleanreplace 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
1234Gas tank vent hose obstructed Carburetor inlet needle defective Fuel hose obstructed Fuel screens obstructed 1234Clean vent hose Replace needle Cleanreplace hose Cleanreplace inlet screenvalve screen