2009 Yamaha WaveRunner FX High Output (FY1800) / FX Cruiser High Output (FY1800A) Service Manual (P/N LIT-18616-03-19)

This Yamaha factory service manual covers the 2009 WaveRunner FX High Output (FY1800) and FX Cruiser High Output (FY1800A) with the 6BH 1.8 L naturally aspirated engine. Publication LIT-18616-03-19 is the first edition, dated March 2009.

The download is a 405-page PDF in English with searchable text.

• Engine repair: Engine removal and installation, cylinder-head and crankcase disassembly, valve-seat refacing, camshaft timing, and crankshaft bearing selection.

• Fuel and cooling: Fuel pump module and injector checks, fuel-pressure testing, thermostat inspection, and oil-cooler pressure testing.

• Jet pump: Impeller and drive-shaft service, bearing and seal replacement, intermediate-housing overhaul, and jet thrust nozzle adjustment.

• Electrical diagnosis: ECM connector pinout charts, sensor tests, starter-motor overhaul, charging-system checks, and Yamaha Diagnostic System (YDIS) troubleshooting.

• Controls and hull: Quick Shift Trim System (QSTS), steering master, shift cables, bilge system, and model-specific handlebar procedures.

• Maintenance: Periodic maintenance intervals, compression testing, valve-clearance checks, spark plug service, and engine oil and filter replacement.

Yamaha prepared this manual primarily for its dealers and trained mechanics who already understand the mechanical and electrical principles involved in watercraft service.

6BH Engine Repair and Component Identification

Engine installation covers mounting shims and drive-coupling clearance. Internal repair procedures extend to piston and connecting-rod inspection, crankshaft journal and pin oil-clearance checks, and color-coded bearing selection. Valve adjustment includes intake and exhaust valve-pad selection tables.

Reference tables supply component tightening torques, cylinder-head warpage limits, spark plug gaps, and oil capacities.

HO versus SHO: The engine overview identifies parts that differ from the 6S5 engine, including the throttle body, camshafts, pistons, connecting rods, oil pump, oil cooler, and ECM. These parts are not interchangeable between the two engines, helping you check component identity before planning a repair.

Fuel, Lubrication, and Cooling

Fuel coverage includes quick connectors, the fuel sender, rollover and check valves, and the fuel rail. Injector installation cautions explain how improper O-ring lubrication can twist or tear the seal and cause fuel leakage.

The Lubrication system and Cooling system diagrams show oil passages and cooling-water routing. Oil-pump installation covers priming. Yamaha specifies that the fuel pump module, throttle body, oil pump, and oil cooler are not to be disassembled.

Special-tool references include fuel-pressure gauge YB-06766 and adapter YW-06842.

Jet Pump, Steering, and Hull Components

Pump procedures include impeller clearance and housing measurements, drive-shaft runout checks, and intermediate-shaft bearing and seal installation.

QSTS grip and converter service accompanies steering and shift-cable adjustment. Separate illustrations identify HO and Cruiser handlebar routing, while the hull chapter covers seats, hood, sponsons, reboarding step, and Cruiser pull-up cleats.

YDIS and Electrical Fault Tracing

The ECM circuit diagram, ECM coupler layout, and Diagnostic code and checking step tables connect fault codes with wiring checks and component tests. Troubleshooting charts also cover no-crank, no-start, poor acceleration, and limited-speed complaints when no code is detected.

YDIS procedures specify versions 1.30 or 1.32 and connecting kit 60V-85300-04. The section covers live sensor monitoring, stationary tests of injectors, ignition coils and the fuel pump, cylinder-drop testing, and recorded fault data.

These functions support fault isolation when the meter's single-code display is insufficient, particularly for the electronic throttle valve (ETV), throttle position sensor (TPS), and accelerator position sensor (APS). A computer, YDIS software, and communication hardware are required for these tests.

Control tables explain cruise assist, no-wake mode, L-MODE, and protective engine-speed limits. Yamaha Security System coverage includes transmitter registration using an entry box.

The relay test section warns that reversed battery connections can damage the main and fuel pump relay.

When working on marine fuel and electrical systems, always adhere to standard workshop safety protocols and use appropriate personal protective equipment.

File Format and Readability

Page count: 397 chapter pages, including four memo pages, plus two cover pages, one notice/copyright page, one contents page, two blank pages, one wiring-diagram key, and one wide color wiring diagram. All are included in the 405-page total.

Navigation: PDF bookmarks cover the nine chapters and the wiring diagram. Text copying is restricted by the PDF settings; printing is permitted.

Diagram readability: Small wire codes and connector numbers on the wide plan need zooming. The other pages are A4; shrinking the entire wiring diagram onto one A4 or Letter sheet reduces detail.

The cover also carries document code F2H-28197-1M-11.