1996 Yamaha WB760U WaveBlaster II Jetski Service Manual

WB760U detailed fuel system tuning — carburetor settings, jet specifications (Main Jet 135/137.5, Pilot Jet 115), and oil injection procedures with part numbers LIT-18616-01-47, 90890-06752.

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Document Details

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Document Number / Seller:
24885 / George Thompson
File Size:
9.39 MB
File Type:
PDF
Language:
English
Printable:
Yes
Category:
Personal Watercraft (PWC)
Last updated / verified
Feb 5, 2025

Models Covered & Key Technical Specifications

Yamaha WB760U WaveBlaster II — 1996 Licensed Dossier for Commercial Resource Packet.

  • Nominal Locking Torques: Flywheel bolt is configured at 70 Nm (7.0 m·kg, 50 ft·lb) peak fastening benchmark Requirements.
  • Prescribed Containment Volume: For fuel tank capacity, 40 L (10.6, 8.8 US/Imp gal) represents the main reservoir range Sequences.
  • System Running Clearance: Impeller clearance is established at 0.3–0.4 mm (0.01–0.02 in) operational baseline Specifications.
  • Technical Heat Tolerance: The engine thermo switch limits 90–96°C (194–205°F) for overheat protection Threshold.
  • Standard Weight Data: Dry weight maintains 180 kg (397 lb) total vessel mass Baseline.
  • Defined Threaded Fastener Data: Cylinder head bolts indicate M8 @ 36 Nm (3.6 m·kg, 26 ft·lb) assembly guidelines Requirements.

Professional Workshop Service Manual & Technical Specifications

Functional Engineering Technical Manual: Personal Watercraft (PWC) Essential Yamaha WaveBlaster II WB760, WB760U Jetski Service Manual - Comprehensive Repair Guide Manual-Nexus

Operational-Framework: Yamaha WB760U (1996) // Engine-Type: 2-Stroke, Water-Cooled Reed Valve Logic // Operational-Framework: 144 pages, 19 chapters, digital CDI ignition system.

Specification Value Framework
Document Pages 144 Complete reference material included
Engine Type 2-Stroke, Water-Cooled Technical specifications documented
Ignition System Digital C.D.I. Magneto Wiring diagrams and adjustment data provided
Propulsion Jet Pump (Axial Flow, Single Stage) Component removal/installation procedures included
Displacement 754 cc (46.02 cu. in) Bore and stroke measurements documented

Service procedures are grouped by Reed Valve, Exhaust Ring, Cylinder Head, Piston, Engine Unit Removal, Flywheel Magneto, Electrical Unit, Starter Motor, Crankcase, Crankshaft, Intermediate Housing, Jet Pump Unit Removal, Deflector/Nozzle/Duct, Impeller and Drive Shaft, and Cooling and Bilge System, merging Electrical components with Charging system considerations, coordinating Hull and Hood structures, and encompassing Trouble Analysis protocols.

Advanced Topology

Verification procedures are included for fuel system components, carburetor assembly, oil injection mechanisms, and electrical circuit continuity. The document provides detailed torque specifications for the engine mounting system to ensure proper mating surface contact. Exploded diagrams accompany each major assembly with step-by-step removal and installation procedures, supported by service point annotations for wear limits and replacement thresholds.

Modular Architecture

Repair information is provided for the control system, including steering cable, throttle cable, and choke cable inspection routines with adjustment parameters. Maintenance intervals are documented for periodic service at 10-hour (break-in), 50-hour (3-month), 100-hour (6-month), and 200-hour (annual) intervals. Special tools are catalogued with part numbers and manufacturer references, along with measuring instruments for precise diagnostics.

Operational Benchmarks

The document includes coverage of ignition spark gap testing, spark plug inspection procedures, and compression measurement protocols. Battery fluid level assessment, specific gravity evaluation at 20°C, and charging current specifications are documented. Wiring diagrams delineate the ignition system, starting system, charging system, and indication system with terminal identification and connector types.

Structured Architecture

Brake system specifications are included for control lever free play (throttle: 7-10 mm, choke: 1-6 mm) with lock nut torque values. Hull repair guidance encompasses light scratching restoration with progressive grit sanding, deep scratching remediation using gel-coat application, and punctured hull repair employing fiberglass lamination techniques. Exhaust system, deck components, gunwale assembly, and mat installation procedures are systematically organized with photographic exploded diagrams.

Integrated Benchmarks

Safety procedures are documented for gasoline handling, ventilation during engine testing, personal protection equipment requirements, and electrical system hazard warnings. The manual designates symbol conventions for lubrication points (water-resistant grease, molybdenum disulfide grease, outboard motor oil), sealing compounds (Gasket Maker, Yamahabond #4, LOCTITE variants), and special fastener applications. Oil injection system air bleeding procedures, cooling water passage flushing, and bearing greasing capacity specifications (ranging from 2.0 to 35.0 cm³) are documented with measurement references.

The document contains torque specifications for fasteners across engine, jet unit, and structural assemblies to ensure proper connection integrity. Specifications for electrical resistance measurements, voltage regulation ranges (14.3-15.3 V), and thermo sensor temperature thresholds (ON: 90-96°C, OFF: 76-90°C) are provided as reference data. Carburetor jet sizing (main jet: 135-137.5, pilot jet: 115), reed valve parameters (thickness: 0.4 mm, valve lift: 9.0±0.2 mm), and impeller clearance limits (service limit: 0.6 mm) are systematically tabulated.

FAQ

Assess the **critical** calibration for the trolling speed. keyboard_arrow_down

1,300 + 50 r/min is the required trolling speed specification found on page 2-2, adjusted using the low speed screw at 1-3/4 + 1/4 turns out.

What components require **precise** clearance measurements on the impeller? keyboard_arrow_down

0.3 ~ 0.4 mm (0.01 ~ 0.02 in) is the specified impeller clearance with a service limit of 0.6 mm (0.024 in), measured at all four points during jet pump inspection on page 6-4.

Confirm the **specified** torque for the impeller bolt. keyboard_arrow_down

18 Nm (1.8 m·kg, 13 ft·lb) is required for the impeller installation, with the impeller featuring left-hand threads requiring clockwise rotation to loosen per page 6-3.

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Reviews (2)

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The Yamaha WB760U manual provides fantastic detail and is well-organized. I found the torque specifications particularly helpful. The customer support was also impressive; they responded to my email inquiries promptly and provided great assistance. Overall, a solid purchase!
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This service manual is a lifesaver! The step-by-step instructions are easy to follow, and the visuals really help clarify the more complex repairs. Plus, the download process was smooth and quick. I received my link almost instantly! Highly recommend it for anyone looking to maintain their jet ski properly.