2004-2006 Kawasaki 900 STX Jet Ski Service Manual, Page 234Get this manual
APPENDIX 16-3 Troubleshooting
Head gasket leak Spark plug leak Worn Cylinder
Fuel System Outside Carburetor
Inside Carburetor
Misuse of choke Fuel filter screen clogged Fuel feed line leaking or clogged Pulse line leaking or clogged Vent line clogged Faulty fuel pump Water in carburetor Carburetor diaphragm damaged Float arm not adjusted Pilot screw andor idle adjusting screw maladjusted Float valve clogged Float valve worn or stuck open