2007–2010 Kawasaki JET SKI Ultra 250X / 260X / 260LX Service Manual (P/N 57001-1650)

• Covers 2007–2010 Kawasaki JET SKI Ultra 250X, 260X, and 260LX watercraft, including the JT1500B and JT1500E/F engine-variant configurations
• Official Kawasaki Service Manual, P/N 57001-1650 4th Edition (published November 26, 2009)
• Comprehensive 545-page PDF reference detailing engine, chassis, electrical, supercharger, and DFI system specifications for the complete JT1500-series build
• Contains 47 detailed exploded-view component diagrams, 5 engine-management wiring schematics, and 12 specialized torque specification tables
• Covers critical subassemblies including the Immobilizer amplifier, Kawasaki Smart Steering System, Idle Speed Controller (ISC), vehicle-down sensor, water box muffler, oil separator tank, semi-dry sump, and the intercooler
• Features an Engine Oil Flow Chart, Cooling and Bilge System Flow Diagram, DFI System Wiring Diagram, Periodic Maintenance Chart, Valve Clearance Adjustment Charts, and Cable, Wire and Hose Routing views to simplify complex tasks like submerged engine recovery, supercharger drive belt replacement, and ignition key registration

Engine and DFI System Overview

Looking for accurate diagnostic sequences? This factory reference delivers the exact data required to inspect, maintain, and repair the Ultra 250X, 260X, and 260LX without wasting time on the shop floor. It breaks down all major watercraft systems, offering an unobstructed look at the internal Digital Fuel Injection (DFI) components, the supercharger drive system, and the pump assembly. Workshop efficiency relies on fast troubleshooting. That is why the manual details specific fuel system diagnostics, mapping out self-diagnosis modes and service code character tables for the electronic control unit (ECU). Bypass trial-and-error parts swapping with precise cable and hose routing views that allow you to trace electrical faults without stripping the entire hull. Kawasaki organized the material system-by-system. This layout lets mechanics quickly pull up service limits, inspection criteria, and maintenance intervals for the four-stroke, 1498 cm³ DOHC architecture right when a ski is torn down on the bench. To avoid expensive dealership labor rates, this reference also outlines step-by-step instructions for complex procedures like FPO and SLO immobilizer key registrations, systematic submerged engine recovery, and replacing the supercharger drive belt.

Technical Data and Service Parameters

Hard numbers matter when you are turning wrenches. Engine maintenance data is laid out in segmented specification tables covering valve clearances, spark plug gaps, and fluid capacities for both the B-series and E/F-series hulls. Need to torque down the supercharger pulley nuts or the crankshaft sensor screws? The precise N·m and ft-lb values are mapped out here. For example, intake valve clearance is specified at 0.15–0.24 mm. You will also find the supercharger drive belt tension standard set to 500–960 N, which requires the proprietary belt gauge to measure accurately. Maximum generator output sits at 16 A at 14 V. Keep in mind that working on high-performance marine engines carries inherent safety risks. Always reference these authorized factory specifications and follow standard workshop protocols to ensure the watercraft operates reliably before putting it back on the water