1994–1995 Kawasaki JT750 Jet Ski Service Manual Supplement (P/N 99924-1164-51)

• Complete 356-page PDF set: 1995 JT750-B1 STS supplement, P/N 99924-1173-51 (52 pages); 1994 JT750-A1 ST supplement, P/N 99924-1164-51 (128 pages); and 750SX base service manual, P/N 99924-1156-04 (176 pages).
• Covers the 1994 JT750-A1 ST beginning with hull number JT750A-600001 and the 1995 JT750-B1 STS beginning with JT750B-600001, with the alternate KAW-format hull-number patterns shown in the model-application tables.
• Documents carburetor and fuel-pump service, carburetor synchronization, oil-pump bleeding and performance testing, exhaust-system repair, engine removal, top-end inspection, crankcase splitting, and crankshaft measurement.
• Details drive-shaft and holder service, pump removal and internal assembly, impeller inspection and clearance checks, steering-cable work, reverse-bucket adjustment, and STS electric-trim diagnosis.
• Includes three model-specific wiring diagrams, a fuel-system diagram, cable/wire/hose routing views, an electric trim-nozzle troubleshooting chart, electrical test tables, and assembly-level exploded views.
• Provides component torque tables, capacities, wear limits, clearances, electrical resistance and output data, adjustment specifications, and factory tool references for the covered assemblies.

Three-Manual Coverage, Not a Stand-Alone Supplement

This set follows Kawasaki's required service-document chain for the JT750 models. The 1994 ST supplement contains the procedures unique to the JT750-A1 and directs the technician to the 750SX base manual for shared repair work. The 1995 STS supplement then adds the JT750-B1-only material and expressly requires both the ST supplement and the base manual. All three documents are included here, so the cross-referenced procedures are available in one PDF set.

The two supplements are first editions dated July 12, 1993 and January 31, 1995. The included base book is the later fourth edition dated January 22, 1997; its model-application table covers JS750-A1 through JS750-A4. The supplement text originally cites earlier revisions of that base publication, while the file in this set is P/N 99924-1156-04.

Kawasaki states that these manuals are designed primarily for trained JET SKI mechanics working in a properly equipped shop, while owners with basic mechanical knowledge, correct tools, and sound workshop practices can use them for basic maintenance and repair.

ST and STS-Specific Systems

The ST material goes well beyond tune-up data. It covers the CDK40-34 carburetor and fuel system, choke and throttle controls, fuel tank and venting, oil-injection pump, exhaust pipe/joint/expansion-chamber assembly, water-box muffler, engine top and bottom ends, cooling and bilge circuits, drive shaft, jet pump, steering, reverse system, hull fittings, storage, and fault-based troubleshooting. Major factory procedures include engine removal and installation, cylinder inspection and honing references, crankcase assembly, crankshaft runout and connecting-rod checks, pump disassembly, impeller-clearance inspection, and steering or shift-cable adjustment.

For the JT750-B1 STS, the dedicated supplement identifies the CDK40-31 twin-carburetor arrangement and adds carburetor synchronization, revised cable routing, STS steering components, the trim cable, trim motor box, trim-angle sensor, trim switch, and electric trim-nozzle troubleshooting. It also flags a throttle-case adjusting-bolt detail limited to early JT750-B1 units, a useful distinction when matching hardware to the correct repair procedure.

Electrical Diagnosis, Tools, and Repair Cautions

Electrical coverage runs from battery and starter-motor service through charging-coil, regulator/rectifier, pickup-coil, ignition-coil, CDI igniter, warning-light, level-sensor, temperature-sensor, and switch testing. The three wiring diagrams correspond to the 750SX base, ST, and STS configurations; the STS pages add trim motor and sensor circuit checks rather than treating the trim system as a generic accessory.

Named service equipment includes the Impeller Wrench 57001-1228, Coupling Holder 57001-1230, Drive Shaft Holder Adapter 57001-1231, Watercraft Engine Stand 57001-1295, Coil Tester 57001-1242, and Watercraft Strap Tool 57001-1294.

The manuals also call out damage-prone operations. Rolling the hull to the wrong side can let exhaust-system water enter the engine, while an inc