1998 Yamaha GP800 WaveRunner GP Service Manual
Covers jet pump unit, 2-stroke engine, carburetor systems with spec torques—impeller clearance 0.32–0.40 mm, compression ratio 6.6:1. Technical reference LIT-18616-01-93.
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Sample pages from the 1998 Yamaha GP800 WaveRunner GP Service Manual manual
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Models Covered & Key Technical Specifications
Yamaha GP800 WaveRunner GP — 1998 Consolidated Mechanical Primer & Mechanical Vault Kit.
- Certified Installation Footprint: 784 cm³ (47.8 cu. in) corresponds to the engine displacement Architecture.
- Measured Maximum Resolution: For optimal performance, 88.3 kW (120 hp) at 7,000 r/min is calibrated to the peak power output Norms.
- Design Twist Specifications: The compression chamber determines 6.6:1 as the established combustion ratio Bounds.
- Engineered Deviation Limits: Cylinder bore-to-stroke geometry requires 80.0 × 78.0 mm (3.15 × 3.07 in) set as dimensional Topology.
- Verified Operating Temps: Fuel capacity defines 50 L (13.2 US gal) as the system reservoir Matrix.
- Factory Gross Dimensions: Battery voltage rating is specified to 12 V / 68.4 kC (19 Ah) Standards.
Professional Workshop Service Manual & Technical Specifications
Operational Assembly Manual: Yamaha GP800 WaveRunner GP (1998) OEM-Documentation
Documentation-Type: GP800 (1998) // Operational-Scope: Engine and Power Plant Systems / Fuel-Delivery Architecture // Repair-Classification: Service-Focused Technical Reference.
| System Category | Coverage Area | Reference |
|---|---|---|
| Engine Specifications | Complete dimensional and performance data for 784cc 2-stroke power plant | Chapter 2: General Specifications |
| Fuel System Architecture | Carburetor configuration, tank capacity, and fuel routing documentation | Chapter 4: Fuel System Components |
| Electrical Framework | Ignition, charging, and starting system specifications with wiring diagrams | Chapter 7: Complete System Reference |
Following OEM groupings, the manual includes engine specifications and drivetrain architecture, details fuel injection and carburetor systems, examines jet pump operational parameters, covers control system mechanics, and presents electrical component configuration alongside service point reference material.
Structured Interface
Drivetrain specifications are addressed in comprehensive detail, documenting the direct-drive transmission configuration and axial-flow jet pump propulsion system. The document references torque specifications for mounting bolts and fasteners, providing component assembly data for technicians performing disassembly and reassembly operations.
Advanced Logic-Path
Reassembly procedures are specified for major subassemblies including the engine unit, intermediate housing, and jet pump components. The manual captures exploded diagrams paired with sequential installation charts, showing numbered part identification and assembly order. Removal procedures mirror installation steps in reverse sequence, with annotations regarding component orientation and alignment requirements.
Systematic Topology
Service intervals are documented for routine maintenance tasks, including spark plug inspection, fuel filter replacement, and bilge system cleaning. The document includes maintenance interval scheduling based on operating hours (10, 50, 100, and 200-hour intervals), with corresponding reference pages for each service category. Cable adjustment procedures and bearing clearance measurements are presented with visual diagrams and dimensional specifications.
Precise Topology
Component locations are identified for all major systems through detailed exploded diagrams and wiring schematics. The electrical system section features complete wiring diagrams for the ignition, starting, charging, and indication circuits, with color-coded lead identification and component connectivity documentation. Oil hose routing, cooling water passages, and electrical harness paths are illustrated with reference to chapter locations for related service procedures.
Precise Benchmarks
Service procedures are documented for electrical testing including resistance measurements, continuity checks, and voltage verification using specified test equipment. The manual provides comprehensive charts for CDI unit resistance values, coil measurements, and circuit continuity testing across all electrical subassystems. Bolt tightening torque tables organize fastener specifications by component group, with sequential tightening patterns illustrated for multi-bolt assemblies requiring progressive stages to specification.
The manual documents torque specifications for the crankshaft mounting bolts to ensure proper axial load stability, with reference values provided in both metric and imperial units. Service points throughout identify areas requiring specific gasket compounds (Gasket Maker®, Yamabond #4, LOCTITE varieties, and silicon sealant) and lubrication types (water-resistant grease, 2-stroke motor oil, molybdenum disulfide compounds).
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