Sun Coast Cycle Sports stocks used OEM parts for the Kawasaki STX-15F, the mid-range personal watercraft (PWC) in Kawasaki's Jet Ski lineup. Produced since 2004, the STX-15F features a 1,498cc inline-four engine with fuel injection, a direct-drive jet pump, and a three-person hull designed for a balance of performance and stability. The STX-15F has been one of Kawasaki's most popular recreational watercraft, offering strong performance at a more accessible price point than the flagship Ultra models. Each part is individually inspected, photographed, and ships from our Odessa, Florida facility.
STX-15F generation and parts compatibility
The STX-15F has been produced since 2004 with incremental updates rather than full redesigns. The 1498cc inline-four engine is shared across Kawasaki's Jet Ski lineup in various states of tune. The STX-15F uses a naturally aspirated version of this engine, while the Ultra 300/310 models use supercharged variants. Engine internals from other naturally aspirated 1498cc Kawasaki watercraft may cross over, but supercharged components from Ultra 300/310 models are not compatible with the STX-15F.
The hull design, jet pump, ride plate, and intake grate are STX-15F-specific. While the general hull concept has remained consistent, Kawasaki has made refinements over the production run that can affect fitment of hull-mounted components. Always verify the specific model year when ordering hull, pump, and bodywork components.
The STX-15F does not share its hull with any Ultra-series watercraft. The Ultra models use wider, heavier hulls designed for luxury touring, while the STX-15F uses a narrower, sportier hull.
Common STX-15F failure points and replacement parts
Jet pump wear ring and impeller: The jet pump is the primary wear system on any PWC. The wear ring, impeller, and pump housing develop clearance issues over time, reducing thrust and efficiency. Wear rings, impellers, and pump seal kits are the most commonly requested drivetrain parts.
Hull damage: Fiberglass hull damage from dock strikes, debris impact, and beaching is common. Hull repair materials, rub rails, and bumper components are frequent parts requests.
Electrical system corrosion: Saltwater and freshwater exposure corrodes electrical connectors, wiring, and sensors. The ECU, fuel injection sensors, starter motor, and battery connections are vulnerable. Electrical component replacements are among the highest-volume parts categories for watercraft.
Intake grate and ride plate: The intake grate and ride plate sustain damage from rocks, sand, and debris drawn into the pump. Replacement grates and ride plates are periodic maintenance items, particularly on watercraft used in shallow or debris-laden waters.
Fuel system: Ethanol-blended fuel deteriorates rubber fuel lines and seals faster than pure gasoline. Fuel line kits, fuel filter assemblies, and fuel pump components are common replacement items on watercraft that sit between seasons.
Commonly replaced STX-15F parts
- Jet pump wear ring and impeller
- Pump seal kit
- Intake grate and ride plate
- Fuel lines and fuel filter
- Battery and electrical connectors
- Starter motor and solenoid
- Seat assembly and hull trim
- Spark plugs and ignition coils
Frequently asked questions
Q: Does the STX-15F share its engine with other Kawasaki Jet Skis?
The STX-15F uses the 1498cc inline-four engine found across Kawasaki's Jet Ski lineup. The STX-15F version is naturally aspirated. Other naturally aspirated Kawasaki watercraft using this engine family may share internal components. The supercharged Ultra 300/310 models use a different version of this engine with a supercharger, intercooler, and revised internals that do not interchange with the STX-15F.
Q: Does the STX-15F share hull parts with Ultra models?
No. The STX-15F uses a narrower, sportier hull while Ultra models use wider, heavier touring hulls. Hull, deck, seat, and pump components are model-specific.
Q: How often should the jet pump wear ring be replaced?
Wear ring replacement frequency depends on usage and water conditions. Sandy or debris-laden water accelerates wear. Most recreational users replace the wear ring every 100-200 hours of use or when they notice reduced acceleration and top speed.
Inspected by Powersports Technicians • Only One in Stock • Ships Fast from Florida
