2004-2006 Kawasaki 900 STX Jet Ski Service Manual, Page 235Get this manual
16-4 APPENDIX Troubleshooting
Flame arrester clogged
Electrical System Other Weak Spark
Ignition timing wrong Reduced ignition coil output High voltage insulation breakdown Spark plug fouled Spark plug gap wrong Poor wiring connection, spark plug cap Faulty CDI igniter Faulty magneto Battery voltage low Spark Plug incorrect
Engine Lubrication System
Oil line clogged Faulty oil pump