This comprehensive workshop service repair manual provides detailed instructions and technical information for the Kawasaki Jet Ski Ultra 300X and 300LX models. It covers the JT1500H and JT1500J, equipped with the 1498 cc 4-cylinder, 4-stroke, 4-valve, supercharged, water-cooled engine.

The manual delves into various aspects of the Jet Ski, offering guidance on everything from general information and technical specifications to detailed procedures for maintenance, repairs, and troubleshooting.

You'll find comprehensive sections on:

* **General Information:** Introduces you to the Kawasaki Jet Ski Ultra 300X and 300LX models, providing essential background information.
* **Technical Information:** Offers a detailed look at the technical specifications, including engine details, dimensions, and other vital technical data.
* **Periodic Maintenance:** Guides you through scheduled maintenance procedures, ensuring your Jet Ski operates smoothly and reliably.
* **Tightening Torque:** Provides precise tightening torque specifications for various components, ensuring proper assembly and avoiding damage.
* **Special Service Tools:** Lists required specialized tools for specific maintenance and repair tasks.
* **Fuel System (DFI):** Covers the Direct Fuel Injection system, explaining its operation, troubleshooting, and repair procedures.
* **Throttle Position Sensor and Accelerator Position Sensor:** Explains the function and diagnostics of these crucial sensors, essential for engine control.
* **Fuel Injectors System:** Offers detailed information on the fuel injectors, including cleaning, testing, and replacement.
* **Electronic Throttle Valve (ETV) System:** Explains the operation and troubleshooting of the ETV system, which controls throttle response.
* **Supercharger System:** Provides in-depth coverage of the supercharger system, including its components, operation, and maintenance procedures.
* **Intake Manifold System:** Explains the function of the intake manifold and how to diagnose and repair any problems.
* **Air Bypass System:** Details the air bypass system and its role in engine operation, along with troubleshooting tips.
* **Engine Lubrication System:** Provides a comprehensive overview of the engine lubrication system, including oil changes, filter replacement, and troubleshooting.
* **Exhaust System:** Covers the exhaust system, including the water box muffler, exhaust manifold, and troubleshooting procedures.
* **Engine Top End System:** Explains the engine's top end components, including the cylinder head, valves, and associated systems.
* **Engine Removal & Installation:** Provides step-by-step instructions for safely removing and reinstalling the engine.
* **Coupling & Output Shaft:** Explains the coupling and output shaft, including troubleshooting and repair procedures.
* **Alternator Rotor System:** Details the alternator system, its operation, and potential problems.
* **Crankshaft and Connecting Rods:** Covers the crankshaft and connecting rods, including inspection, repair, and replacement procedures.
* **Cooling System:** Provides a comprehensive guide to the cooling system, including troubleshooting, maintenance, and repair.
* **Bilge Systems:** Explains the bilge system, its function, and how to maintain and troubleshoot it.
* **Intercooler System:** Covers the intercooler system, its role in cooling the engine, and any potential issues.
* **Drive System:** Provides a detailed explanation of the drive system, including the pump, impeller, and associated components.
* **Pump & Impeller System:** Explains the pump and impeller system, including maintenance, troubleshooting, and repair.
* **Steering System:** Covers the steering system, its operation, and potential problems.
* **Trim Control Cable:** Explains the trim control cable and how to adjust and troubleshoot it.
* **Reverse System:** Details the reverse system, its function, and how to diagnose and repair any problems.
* **Hull and Engine Hood:** Provides information on the hull and engine hood, including repair and maintenance procedures.
* **Electrical System:** Explains the electrical system in detail, covering the battery, starter, charging system, and more.
* **Battery System:** Guides you on battery maintenance, testing, and replacement.
* **Electric Starter System:** Offers details on the electric starter system, including troubleshooting and repair.
* **Charging System:** Covers the charging system, its operation, and potential problems.
* **Ignition System:** Provides a thorough understanding of the ignition system, including its components and troubleshooting.
* **Electrical Parts Location:** Identifies the location of electrical components, making troubleshooting and repair easier.
* **Kawasaki Smart Steering (KSS) System:** Explains the KSS system, its operation, and potential issues.
* **Electric Trim Control System:** Details the electric trim control system, including its function and troubleshooting.
* **Multifunction Meter:** Provides information on the multifunction meter and its use.
* **Immobilizer System:** Covers the immobilizer system, its operation, and how to address any problems.
* **Lighting & Switch System:** Explains the lighting and switch systems, including troubleshooting and repair.
* **Storage System:** Details the storage system, including maintenance and potential problems.
* **Cable-Wire-Hose Routing:** Provides detailed diagrams for proper routing of cables, wires, and hoses.
* **Troubleshooting Guide:** Offers a comprehensive guide for troubleshooting various issues with the Jet Ski.
* **Electrical Wiring Diagrams:** Includes detailed electrical wiring diagrams to assist with electrical troubleshooting and repair.

This manual serves as a valuable resource for both professional mechanics and DIY enthusiasts, providing the information needed to maintain, repair, and troubleshoot the Kawasaki Jet Ski Ultra 300X and 300LX.

## Dominating the Water: The Kawasaki Ultra 300X and 300LX Jet Ski

The Kawasaki Ultra 300X and 300LX are two high-performance personal watercraft designed for the thrill seeker and adrenaline junkie. Powered by a massive 1,498cc, four-stroke, supercharged engine, these jet skis are capable of reaching top speeds exceeding 70 mph, making them some of the fastest and most powerful production models on the market. The 300X, boasting a lightweight and agile design, is the ultimate performer for aggressive riding styles, perfect for racing and pulling off impressive stunts. Meanwhile, the 300LX prioritizes comfort and convenience with added features like a luxurious Ergo-Fit seat and a premium sound system, ideal for leisurely cruising and enjoying the ride with friends.

Both models are packed with Kawasaki's signature technology. The Ultra 300X and 300LX benefit from the innovative Kawasaki Electronic Throttle Control (K-ETC) system, which provides precise engine control and seamless power delivery. A well-balanced hull design, combined with a powerful, responsive engine, ensures exceptional handling and stability in any condition. The jet skis also feature Kawasaki's advanced electronic steering system and reverse system, contributing to a smooth and predictable riding experience. These features, alongside the renowned durability and reliability of Kawasaki engines, make the Ultra 300X and 300LX a compelling choice for both seasoned watercraft enthusiasts and newcomers seeking an exhilarating experience on the water.