2004-2005 Kawasaki STX-15F Jet Ski Factory Service Manual., Page 423Get this manual
16-34 APPENDIX Troubleshooting Guide
Fuel to injector insufficient (DFI) Fuel tank air vent obstructed Fuel line clogged Fuel pump trouble (DFI) Injector clogged Throttle body assy loose Throttle body assy gasket damaged Fuel line clogged Fuel pump operates intermittently Inlet air temperature sensor trouble Throttle sensor trouble Inlet air pressure sensor trouble Compression low Spark lug oose Cylinder head not sufficiently tightened down No valve clearance Cylinder, piston worn Piston ring bad (worn, weak, roken, or sticking) Piston ringgroove clearance excessive Cylinder head gasket damaged Cylinder head warped Valve spring broken or weak Valve not seating properly (valve bent, worn, arbon accumulation on the seating surface Knocking Carbon built up in combustion chamber Fuel poor quality or incorrect Spark lug ncorrect IC igniter in ECU trouble Camshaft position sensor trouble Crankshaft sensor trouble Ignition coil trouble Inlet air temperature sensor trouble Miscellaneous Throttle valve won't fully open Engine overheating Engine oil level too high Engine oil viscosity too high Air suction valve trouble Camshaft am worn Engine oil iscosity too igh Lubrication inadequate Engine oil evel too ow Engine oil poor quality or incorrect Oil cooler incorrect Oil cooler clogged Sensor incorrect Water temperature sensor broken