Yamaha FX HO, FX Cruiser HO Waverunner 2011 Owner's Manual

The recommended maintenance schedule includes an initial service after the first 10 hours or one month of use, followed by regular maintenance every 100 hours or annually, whichever comes first. Key tasks include oil changes, spark plug inspection, and checking the cooling system.
To winterize your Waverunner, you should thoroughly clean and dry the exterior, add fuel stabilizer to the tank, flush the cooling system with fresh water, change the oil and filter, remove the battery and store it in a cool, dry place, and cover the unit to protect it from dust and moisture.
If your Waverunner won't start, first check the battery to ensure it's charged and the connections are secure. Next, inspect the fuel system for any clogs or leaks, and verify that the spark plugs are clean and functioning. If the problem persists, consult a professional technician.
To improve fuel efficiency, regularly maintain your Waverunner by keeping the hull clean and free from marine growth, ensuring the engine is tuned properly, and avoiding rapid acceleration and high-speed maneuvers. Additionally, reduce excess weight and ensure you are using the recommended fuel type.
If your Waverunner is overheating, check the cooling water intake for blockages, ensure the cooling system is functioning properly, and inspect the thermostat for any faults. Additionally, verify that the engine oil level is correct and that the oil is not degraded.
To flush the cooling system, connect a garden hose to the flushing port, start the engine, and then turn on the water supply. Allow the engine to run for a few minutes, then turn off the water and stop the engine. Make sure to perform this procedure in a well-ventilated area to avoid exhaust buildup.
For optimal performance, use Yamalube 4W 10W-40 Oil or an equivalent 4-stroke marine engine oil that meets or exceeds the API service classification of SJ, SL, or SM. Always refer to the owner's manual for specific recommendations.
To prevent corrosion, regularly rinse your Waverunner with fresh water after use in saltwater, apply anti-corrosion spray on metal components, and store the Waverunner in a dry, covered area. Regularly inspect and clean electrical connections to avoid moisture buildup.
To check the oil level, ensure the Waverunner is on a level surface and the engine is warm. Turn off the engine, wait a few minutes, remove the dipstick, wipe it clean, reinsert it fully, and then remove it again to check the oil level. The oil should be within the marked range on the dipstick.
To replace the spark plugs, remove the engine cover, disconnect the spark plug leads, and use a spark plug wrench to remove the old plugs. Install new spark plugs by hand to avoid cross-threading, then tighten them with the wrench. Reconnect the leads and replace the engine cover.