Yamaha WaveRunner FX SHO / FX Cruiser SHO 2008 Service Manual (P/N LIT-18616-03-12)

Yamaha’s WaveRunner service manual covers the 2008 FX SHO and FX Cruiser SHO, both powered by a supercharged DOHC inline-four. This is the first edition from December 2007, P/N LIT-18616-03-12, with Yamaha cover code F1W-28197-1K-11.

Searchable Text and Color Wiring Diagram

Chapter navigation and diagram detail: Search the manual text or use the PDF bookmarks to jump to any of the nine chapters, the wiring legend, or the diagram itself. Zoom in on the color diagram to read the small component labels, connector pin numbers, and wire color codes.

The ZIP contains one printable, 433-page PDF. The total includes both covers, two introductory pages, eight memo pages, one blank page, and the two-page wiring reference.

Engine, Jet Pump, and Electrical Service

The topics below are a selection from the manual. Yamaha also explains off-throttle steering and documents the engine control system’s fail-safe responses.

• Engine and valvetrain: Engine removal and installation, mount checks, camshaft and timing-chain service, cylinder-head repair, and internal inspection of the crankcase and rotating assembly.
• Fuel, lubrication, and cooling: Fuel pump module removal, injector service, fuel pressure testing, oil pump drive service, and checks for the thermostat and cooling-water passages.
• Jet pump and reverse: Pump removal, impeller and drive shaft inspection, intermediate-housing bearing and seal replacement, and service of the reverse gate and thrust nozzle.
• Steering and hull: QSTS grip and converter service, steering master repair, model-specific handlebar procedures, and deck and hull disassembly.
• Electrical and YDIS: Diagnostic-code checks, live sensor data, stationary and active tests, and circuit checks for electronic throttle, ignition, charging, and starting.
• Maintenance and assembly references: Maintenance intervals, cable and hose routing, and exploded assembly views with component lists and tightening torques.

Yamaha wrote this manual for dealer technicians and trained mechanics. The procedures assume mechanical and electrical service experience and access to the specified tools and test equipment.

Engine Alignment and Internal Repair

The power-unit chapter covers engine-to-pump coupling alignment, muffler and exhaust service, intake disassembly, valve-clearance adjustment, and valve-guide and seat repair. It also covers cylinder-head installation, generator cover and flywheel magneto service, starter-clutch work, and oil pan disassembly. Internal checks include the pistons, rings, pins, connecting rods, cylinders, crankshaft, and bearing oil clearances.

Supercharger, Fuel, and Cooling

Yamaha treats the supercharger, air cooler, throttle body, oil cooler, and oil pump as assemblies for removal, testing, and replacement. The manual covers the separate supercharger and scavenge/feed oil pump drive components. Its pressure checks distinguish the air cooler’s water and air passages and cover the oil cooler’s water passages.

The fuel chapter covers tank and module removal, injector inspection, and fuel pressure measurement. It also explains the fuel leak risk from injector O-rings that twist or tear during dry installation. The fuel pump module is serviced as an assembly.

Jet Pump, Steering, and NanoXcel Hull

Jet pump procedures cover the intake grate, ride plate, nozzle ring, impeller duct and housing, transom plate, driven coupling, and grease hose. Periodic checks cover the QSTS trim, steering, shift cable, and reverse gate.

Hull procedures include model-specific steering pads, remote-control cable routing, front hood and mirrors, console covers, seats and hand grip, and exhaust and battery removal. The deck and hull section covers disassembly of the NanoXcel structure.

YDIS, Circuit Tests, and Model-Specific Displays

Yamaha specifies YDIS Ver. 1.30 for reading stored faults, monitoring live data, running stationary coil, injector, and fuel pump tests, and testing individual cylinders with the engine running. The chapter covers data logging and the electronic throttle control module’s recorded fault graph. These functions require the diagnostic software and connecting kit.

The symptom charts and circuit checks help narrow down a no-start even when no fault code is present. The charts also address hard starting, rough or high idle, stalling, poor acceleration, limited engine speed, overheating, low oil pressure, loose steering, rising bilge water, and abnormal warnings.

Circuit procedures cover voltage, peak voltage, resistance, and continuity checks for the water-cooled rectifier/regulator, APS and TPS sensors, electronic throttle valve, temperature and pressure sensors, relays, starter motor, and Yamaha Security System receiver and transmitter. Both models have separate digital speedometer checks. The FX Cruiser SHO also has checks for the compass, air and water temperature, and right-side display. The relay test warns that reversed battery leads can damage the main and fuel pump relay.

Identification, Special Tools, and Reference Drawings

The identification section shows where to find the primary ID, engine serial, jet pump serial, and hull identification number. The special-tool list identifies the YDIS connecting kit (60V-85300-04), air cooler attachment (90890-06731), camshaft wrench (90890-06724), flywheel puller (90890-06723), and drive shaft holder 6 (90890-06520). It gives US and Canadian tool numbers and corresponding 90890-series numbers where applicable.

Reference drawings include the electronic throttle flow chart, wet-sump lubrication schematic, starboard bow, top, and port cable and hose routing views, cooling-water hose routing, electrical component location views, and the color wiring diagram with connector pinouts. Factory tables give fluid capacities, compression and fuel pressure specifications, clearances, wear limits, and electrical test values. Yamaha’s safety precautions cover engine lifting, fuel-system work, electrical cranking tests, and work around the rotating jet pump.

Valve and Impeller Clearance Samples

For both models, the cold valve-clearance check calls for 0.14–0.23 mm at the intake valves and 0.28–0.37 mm at the exhaust valves.

The jet pump inspection lists a standard impeller-to-housing clearance of 0.35–0.45 mm and a service limit of 0.6 mm.