2012 Yamaha WaveRunner FX HO, FX Cruiser HO, FX SHO & FX Cruiser SHO Service & Repair Manual (P/N LIT-18616-03-41)

Yamaha’s service manual for the 2012 WaveRunner FX HO, FX Cruiser HO, FX SHO, and FX Cruiser SHO, P/N LIT-18616-03-41, is the first edition dated February 2012.

• Engine repair: Engine removal and installation, cylinder-head and crankcase disassembly, valve-clearance adjustment, cam timing, and piston, crankshaft, and bearing inspection.

• Fuel and induction: Fuel-pressure testing, injector and fuel-pump checks, electronic throttle valve inspection, and SHO supercharger and air-cooler testing.

• Cooling and lubrication: Thermostat inspection, oil-cooler leak testing, oil-pump assembly checks, and separate HO and SHO hose-routing diagrams.

• Jet pump and trim: Impeller-duct disassembly, shaft and bearing inspection, intermediate-housing repair, reverse-gate adjustment, and Quick Shift Trim System (Q.S.T.S.) service.

• Electrical troubleshooting: YDIS diagnosis, ECM and sensor tests, ignition and charging-system checks, starter-motor inspection, and model-specific wiring diagrams.

• Hull and controls: Steering-master service, control-cable adjustment, hood and deck-fitting removal, Yamaha Security System transmitter registration, and multifunction-meter checks.

Written primarily for Yamaha dealers and trained mechanics, the manual assumes the mechanical and electrical knowledge covered by Yamaha’s YTA marine Bronze Technical Certificate or equivalent experience.

Engine Removal and Internal Repair

Separate procedures cover the 6CR/F2T HO and 6CS/F2S SHO configurations, including engine-mount shims and drive-coupling clearance adjustment.

Internal repair extends to valve-guide replacement, valve-seat refacing, camshaft-journal measurement, and connecting-rod inspection. A valve-pad selection table supports clearance adjustment, while bearing-selection tables accompany crankshaft and connecting-rod clearance checks.

Starter-clutch and flywheel-magneto removal, timing-chain installation, and component-specific torque tables support engine reassembly.

Fuel Injection and SHO Supercharger Service

Fuel-system procedures cover pressure measurement, injector resistance, fuel-rail installation, and pump-module and sender checks. The injector installation notes explain how mishandled O-rings can twist or tear and cause fuel leaks.

SHO coverage includes supercharger impeller and gear inspection, drive-gear one-way operation checks, and air-cooler leak testing. The supercharger, air cooler, and drive-gear assembly are covered for inspection and replacement, with internal disassembly prohibited. The electronic throttle valve also remains an assembled unit.

Observe the manual’s fuel-pressure, ignition-source, and electrical-safety precautions for the specific test being performed.

Cooling Circuits and Oil-System Checks

The Lubrication system and Cooling water flow diagrams distinguish the HO and SHO arrangements. Separate hose-routing views identify connections around the engine, cooler, and exhaust components.

Thermostat testing accompanies oil-cooler pressure checks and oil-pump removal and installation. Oil-pump service is limited to assembly inspection and replacement, rather than internal rebuilding.

Jet Pump, Steering, and Hull Fittings

Jet-pump work covers impeller clearance, drive-shaft runout, duct bearings and seals, and intermediate-housing disassembly and assembly. Coupling procedures specify shaft holder 90890-06730 and coupler wrench 90890-06729, with shim-position and seal-installation details.

Steering-shaft inspection addresses the Off-Throttle Steering (OTS) mechanism. The hull chapter provides exploded assemblies for steering controls, the water lock, and deck fittings; the model-feature section explains the NanoXcel hull and deck construction.

YDIS Diagnosis and Electrical Fault Tracing

The manual specifies YDIS 2.00 for these models; version 1 is incompatible. It supplies model-specific diagnostic information and refers to the separate YDIS instruction manual for detailed software operation.

Diagnostic codes and checking tables link symptoms to component tests. YDIS diagnosis records and ECM record graphs help investigate ETV, TPS, and APS faults that the multifunction meter’s single-code display cannot fully show.

The ECM circuit diagram, ECM coupler layout, and separate HO and SHO wiring diagrams support connector and circuit checks. Electrical data includes ECM and pickup-coil peak-voltage specifications. Relay-testing cautions explain that reversed battery polarity can damage the main and fuel-pump relay.

FX Cruiser SHO coverage also addresses its compass, air-temperature sensor, and combined speed/water-temperature sensor.

A Preview of Sensor and Oil-System Data

These examples represent a small selection of the manual’s electrical reference values and lubrication data.

For FX SHO and FX Cruiser SHO, knock-sensor reference resistance is 504.0–616.0 kΩ at 20°C (68°F). Across all four models, intake-air-temperature sensor resistance is 5.4–6.6 kΩ at 0°C (32°F).

The oil-cooler water-passage holding-pressure test specifies 200 kPa (28.5 psi). Total engine-oil capacity is listed as 4.3 L for all four models; this is distinct from the routine oil-change refill quantity.

Searchable PDF and Wiring Detail

Text search, bookmarks, and diagram detail: Searchable text and embedded bookmarks provide access to the chapters and individual procedures. Small pin numbers and wire-color codes on the wide-format wiring sheets require zooming for comfortable reading.

Supplied as a single printable, English-language 367-page PDF. That total includes the front and back covers, two memo pages, one blank page, and the wiring appendix.