2004-2006 Kawasaki 900 STX Jet Ski Service Manual, Page 233Get this manual
16-2 APPENDIX Troubleshooting
Starting difficulty or failure to start Ignition System Ignition Spark Present
No Spark
Fault in fuel system Lack of compression Faulty or fouled spark plug Faulty plug wire insulation Faulty CDI igniter Faulty ignition coil Faulty magneto Battery voltage low Spark Plug incorrect Wiring shorted or open Fuse blown
Fuel System (check that fuel tank contains fuel) Outside Carburetor