2007–2008 Kawasaki Ultra 250X Jet Ski Watercraft Service Manual

This Kawasaki factory service manual covers the 2007–2008 Ultra 250X Jet Ski, model codes JT1500B7F and JT1500B8F, with the 1498 cm³ supercharged four-stroke engine.

Text search and diagram detail: Service text is searchable; the main wiring diagrams and some other illustrations have labels that cannot be searched. PDF bookmarks open all 16 chapters and the main wiring diagram. Small wire-color codes and ECU pin numbers in the main wiring and DFI diagrams need enlargement for comfortable reading.

• Engine repair: Engine removal and installation, cylinder-head service, valve-seat repair, camshaft timing, crankcase separation, and crankshaft bearing inspection.

• DFI diagnosis: Service-code tables, sensor voltage and resistance checks, injector testing, fuel-pressure measurement, and fuel-flow inspection.

• Supercharger and intake: Drive-belt inspection and adjustment, supercharger pulley service, intercooler disassembly, and air-bypass valve testing.

• Cooling and lubrication: Cooling and bilge flushing, oil-pump and oil-cooler inspection, oil-pressure testing, and recovery procedures after submersion.

• Pump and steering: Jet-pump disassembly and assembly, impeller clearance checks, drive-shaft service, and steering and reverse cable adjustment.

• Electrical systems: Starter, charging, and ignition tests, Kawasaki Smart Steering diagnosis, Multifunction Meter checks, and Immobilizer System key registration.

Written primarily for trained mechanics in properly equipped shops, this manual also supports owners doing basic maintenance and repair who understand mechanical principles, tools, and workshop procedures.

DFI Troubleshooting and Key Registration

The Digital Fuel Injection section pairs service codes with component tests and circuit checks. Its DFI System Wiring Diagram and ECU connector terminal references help trace sensor, wiring, and power-supply faults before replacement parts are selected.

Throttle-body coverage extends to idle-speed inspection and Idle Speed Controller testing. Kawasaki Diagnostic System (KDS) connection information identifies the required interface equipment, including KDS Adapter Cable 57001-1696.

The immobilizer chapter distinguishes spare-key registration, ECU replacement, and loss of both FPO and SLO keys. Spare-key work uses Key Registration Unit 57001-1582 and a dedicated registration flowchart. Loss of both registered keys requires ECU replacement under the documented procedure.

Fuel-system work involves residual fuel pressure and flammable vapors; follow the manual's fuel-handling and battery-isolation precautions.

Engine Repair and Supercharger Service

Periodic maintenance charts lead into valve shim-selection charts, cylinder-head tightening sequences, piston and ring inspection, and crankshaft bearing-insert selection. Factory reference data includes torque tables, fluid capacities, wear limits, and electrical test specifications.

The camshaft-chain tensioner section explains how loosening and retightening its mounting bolts incorrectly can damage the tensioner and chain.

Supercharger procedures cover removal, pulley and bearing checks, rotor cleaning, and reassembly. Internal rotor servicing is limited to cleaning and replacement of the supercharger assembly where required. Belt-tension inspection specifies Belt Measuring Gauge 57001-1697.

Model Differences, Pump and Hull Work

Separate Engine Oil Flow Charts and Cooling and Bilge System Flow Diagrams distinguish the two model configurations. Variant instructions cover the fuel-pump mounting, JT1500B7F air-suction valves, Water Box Muffler arrangements, and exhaust-outlet locations.

The shift-lever holder washer arrangement applies to JT1500B7F from US-KAW33009B707 onward and to JT1500B8F. That serial reference helps identify the correct assembly arrangement before reverse-system repair.

Pump coverage includes shaft bearings, seals, impeller inspection, and impeller-to-pump-case clearance checks. The Hull/Engine Hood chapter covers fittings, hull replacement, and adhesive and rivet applications; the appendix supplies model-specific cable, wire, and hose routing drawings.

Submersion Recovery and Seasonal Storage

After Submerging provides a recovery flowchart and detailed procedures addressing the engine, supercharger, and fuel system. It explains how water left inside the engine can damage crankshaft bearings and other internal parts.

Storage coverage includes preparation, corrosion protection, and return-to-service inspections, with separate attention to the supercharger.

Printable PDF and Included Pages

One English-language, printable PDF contains all 16 chapters. The 506-page PDF comprises 488 numbered chapter pages, one cover, five introductory pages, 11 blank separator pages, and one Model Application page; all are already included in the total.