2004-2005 Kawasaki STX-15F Jet Ski Factory Service Manual., Page 127Get this manual
FUEL SYSTEM (DFI) 3-79 F Li e
If the fuel pressure is much lower than specified, and if inspection above checks out good, replace the fuel filter and measure the fuel pressure againRemove the fuel pressure gauge and adapterRun the fuel hoses in accordance with the Cable, Wire, and Hose Routing section in the Appendix chapterFor JT1500-A2 modelReplace the double spring clamps with new ones(see Fuel System Diagram)
Fuel Flow Rate Inspection