1997–2000 Yamaha WaveRunner GP760 / GP1200 Factory Service Manual

This Yamaha workshop manual covers the 1997–2000 WaveRunner GP760 and GP1200, with factory service and repair procedures for the GP760's GP7 hull and 65V engine and the GP1200's GP8 hull and 65U engine.

Bookmarks and diagram detail: The manual text is not searchable. Embedded PDF bookmarks cover chapters and subsections; small connector and wire-color labels are best read with zoom.

• Engine repair: Engine removal and reassembly, cylinder head and piston inspection, crankcase disassembly, crankshaft checks, reed valves, and exhaust chamber service.

• Fuel and oil systems: Mikuni BN44 carburetor synchronization, fuel pump service, oil injection pump air bleeding, and model-specific linkage adjustments.

• Jet pump and driveline: Pump removal, impeller and drive shaft service, intermediate housing repair, and cooling and bilge-system inspection.

• Electrical diagnosis: Ignition, starting, charging, and indication-system wiring diagrams, component resistance tests, starter motor overhaul, and multi-function meter checks.

• Hull and controls: Steering and trim cable replacement and adjustment, handlebar and hood disassembly, and fiberglass hull repair procedures.

• Maintenance references: Periodic inspection schedules, lubrication points, component-specific torque tables, wear limits, and illustrated special-tool references.

Yamaha directs these procedures to its dealers and their mechanics, using the measuring equipment and service tools specified for the work.

Engine Inspection and Reassembly

The power-unit chapters detail cylinder bore measurement, piston-ring inspection, crankshaft bearing checks, and oil-seal replacement. Exploded views and removal/installation charts distinguish the engine layouts, while engine-mount shim notes and coupling-clearance checks address alignment during reinstallation.

The flywheel magneto section identifies puller YB-06117 / 90890-06521 and the different holders used for each model. It warns that uneven puller seating can damage the engine or tools.

Mikuni Carburetors and Oil Injection

Throttle synchronization is documented separately for each model, with an additional choke-synchronization procedure for the GP760. Carburetor service covers diaphragms, float-arm height, needle valves, jets, and high- and low-speed screw settings; the GP1200 data distinguish individual carburetor positions.

The manual warns that steel-wire cleaning can enlarge jet openings and affect performance. Oil-system coverage includes check valves, delivery hoses, pump inspection, and the GP1200 oil-pump cable adjustment.

Jet Pump and Intermediate Housing

Impeller inspection is supported by model-specific clearance specifications and a wear limit. Drive shaft and bearing work identifies holder YB-06049 / 90890-06518, along with the bearing and seal installation tools.

Intermediate housing drawings distinguish the shaft installation dimensions for the two models. Nozzle, duct, intake, deflector, and trim-ring assemblies have their own removal and installation charts.

Electrical Tests and Fault Tracing

Separate GP760 and GP1200 ignition diagrams show the coil, CDI, and stop-switch connections. Starting, charging, and indication-system diagrams add connector views and wire-color codes; component-layout drawings show lead routing.

The test sections cover pulser and charge coils, CDI resistance tables, rectifier-regulator checks, starter motor brushes and armature, and fuel and oil level sensors. Multi-function meter coverage includes display and security-function checks.

The trouble-analysis charts link symptoms such as poor starting, overheating, weak charging, and irregular warning indications to components and reference chapters. This helps direct diagnosis toward the relevant system before repair work begins.

Steering, Trim, and Hull Repair

Control-system procedures cover steering-nozzle alignment, trim-cable adjustment, handlebar bushings, and throttle and choke cable routing. Hull and hood sections add water-lock inspection and repair procedures for scratches, punctures, insert nuts, and graphics.

For further fiberglass repair details, the text refers to the separate Water Vehicle FRP Repair Manual, which is not included in this PDF.

Follow the manual's precautions for battery disconnection, fuel handling, and ventilation during service.

A Preview of Engine Inspection and Assembly Data

These examples are a small selection of the manual's inspection, assembly, and electrical test specifications.

Both models have a listed piston-to-cylinder clearance of 0.100–0.105 mm and a wear limit of 0.155 mm. The GP760 cylinder-head bolt data specify two torque stages, 15 Nm and 36 Nm, alongside the illustrated tightening sequence.

For both models, the thermo-switch on-temperature is 90–96°C. The ignition-system chapter provides the corresponding continuity-test procedure.

Printable PDF and Included Pages

Supplied as one printable PDF in English. Its 180 pages comprise 160 numbered technical pages, 15 chapter contents pages, and five introductory/index pages, all included in the total.