2009 Arctic Cat 150 ATV Service Manual, Page 76Get this manual
3With either brake applied, the meter must show battery voltageNOTE: If the meter shows no voltage, inspect fuses, wiring harness, connectors, and switches 1Attach the Timing Light to the spark plug high tension lead; then remove the timing inspection plug from the left-side crankcase cover2Using the Tachometer, start the engine and run at 1700 RPM; ignition timing should be 15 BTDC ("F" mark)3Install the timing inspection plugIf ignition timing cannot be verified, the rotor may be damaged, the key may be sheared, the trigger coil bracket may be bent or damaged, or the CDI unit may be faulty
Ignition Timing
The ignition timing cannot be adjusted; however, verifying ignition timing can aid in troubleshooting other componentsTo verify ignition timing, use the following procedure
Troubleshooting
Problem: Spark absent or weak Condition
12345Ignition coil defective Spark plug defective Trigger coil defective CDI unit defective Pick-up coil defective
12345Replace ignition coil Replace plug Replace stator coil assembly Replace CDI unit Replace stator coil assembly