This is a complete original Kawasaki STX-15F engine, compatible with Jet Ski models from 2018 through 2023. It is a 4-cylinder, 4-stroke marine engine, widely known for its durability, strong performance, and ease of maintenance.
Trusted by recreational and performance riders alike, this engine offers powerful acceleration, smooth throttle response, and excellent reliability — even under heavy use or in saltwater conditions.
Ideal for full engine replacements, watercraft restoration projects, or performance upgrades, this unit is ready to drop in and ride.
⚙️ Technical Specifications:
•Engine Type: Inline 4-cylinder, 4-stroke
•Displacement: 1,498cc
•Cooling System: Open-loop water cooling (uses surrounding water)
•Fuel System: Electronic Fuel Injection (EFI)
•Valve Train: DOHC – Double Overhead Camshaft, 16 valves
•Compression Ratio: 10.6:1
•Ignition System: Digital
•Lubrication: Semi-dry sump with integrated oil pump
•Estimated Power Output: ~160 HP (varies slightly by year)
•Max RPM: Approx. 7,500 RPM
•Top Speed (with ski): Around 62–65 mph (100–105 km/h) depending on setup
•Fuel Type: Unleaded gasoline – 91+ octane recommended
📦 What’s Included – Complete Engine Assembly:
This is a fully assembled engine, complete with major internal and external components:
•Complete engine block (crankshaft, pistons, rods, bearings)
•Cylinder head with camshafts and valves
•Valve cover
•Timing chain, guides, and tensioner
•Flywheel (rotor)
•Stator
•Oil pan
•Intake and exhaust manifolds
•Thermostat housing
•Engine mounts
🛠️ Optional add-ons (available separately or on request):
•ECU (Engine Control Unit)
•Complete wiring harness
•Throttle body
•Fuel injectors
•Sensors (MAP, knock, TPS, etc.)
🔄 Compatibility:
✅ This engine fits all Kawasaki STX-15F models from 2018 to 2023
🔁 It can also be adapted for earlier STX-15F models (2004–2017) with minor adjustments (ECU, wiring, sensors).
📌 Engine Condition (choose one to match your offer):
🟢 Used – Low Hours: Compression-tested, verified, clean engine. Professionally inspected. No damage, ready to run.
🟡 Rebuilt: Fully disassembled and rebuilt with OEM-grade components. New gaskets, seals, rings, and bearings installed. Test-run and ready to go.
🚚 Shipping & Packaging:
•Professionally crated and secured for safe transport
•Shipping available to USA
•Tracking and insurance included
•Local pickup may be possible (depending on your location)
•Pallet weight: approx. 180–200 lbs (82–90 kg)
🛠️ Installation & Recommendations:
•Recommended to be installed by a qualified mechanic or experienced technician
•Use matching ECU for best performance
•Flush cooling and fuel systems before installation
•Oil and coolant not included
•Double-check all wiring and fuel connections during swa
