Yamaha FX, FX Cruiser Waverunner 2006 Owner's Manual

The recommended maintenance schedule includes checking and replacing engine oil every 50 hours or annually, inspecting the spark plugs every 100 hours, and regularly checking the coolant, fuel system, and battery condition.
To flush the engine, connect a garden hose to the flushing port, start the engine, then turn on the water. Allow the engine to run for about 5 minutes, then turn off the water before stopping the engine.
First, check the battery connections and charge the battery if necessary. Ensure that the lanyard is properly attached and inspect the fuel level. If the problem persists, check the spark plugs and fuel lines for issues.
Rinse the Waverunner with fresh water after each use, especially after saltwater exposure. Apply anti-corrosion spray to metal components and store the Waverunner in a dry, covered area when not in use.
Yamaha recommends using Yamalube 4W 10W-40 oil for optimal performance and protection of the engine components.
Winterizing involves flushing the engine with antifreeze, draining the fuel system, lubricating moving parts, and removing the battery for storage in a cool, dry place.
Store the Waverunner in a dry, sheltered area on a stand or trailer. Use a cover to protect it from dust and moisture, and ensure it's properly winterized if storing in cold climates.
Inspect the impeller for damage and remove any debris. If the impeller is bent or chipped, it may need to be replaced. Consult the service manual for instructions or seek professional assistance.
Check for blockages in the cooling system, ensure the water intake is clear, and inspect the coolant level. If overheating persists, consult a professional technician.
Start by checking the battery voltage and connections. Inspect the fuses and wiring for damage. If electrical components still malfunction, consult a professional for further diagnostics.