Yamaha SuperJet Waverunner 2020 Owner's Manual
![Yamaha SuperJet Waverunner 2020 manual cover](/images/eb3c7534d16f7f16559f2f02/thumbs/thumb175x175.webp)
To start the Yamaha SuperJet Waverunner 2020, ensure that the safety lanyard is attached, the fuel valve is open, and the choke is engaged if the engine is cold. Press the start button until the engine starts, then release the choke gradually.
Regular maintenance should include checking and changing the engine oil every 50 hours or annually, inspecting the spark plugs, and cleaning the air filter. Additionally, it's important to inspect the hull and check for any leaks or damage.
If the SuperJet does not start, check the battery connections and charge level. Ensure the fuel is fresh and the fuel valve is open. Verify that the safety lanyard is properly attached and inspect the spark plugs for any fouling or damage.
If the engine overheats, stop the engine immediately and let it cool down. Check for any blockages in the cooling water intake, ensure there is adequate water flow, and inspect the coolant level if applicable.
To store the SuperJet for the winter, drain all water from the engine, add a fuel stabilizer to the fuel system, and remove the battery to store it in a cool, dry place. Keep the SuperJet covered and in a dry location.
The Yamaha SuperJet Waverunner 2020 is designed to operate on regular unleaded gasoline with a minimum octane rating of 87. Avoid using ethanol-blended fuels over E10 to prevent engine damage.
Improving performance can be achieved by regularly maintaining the engine, using high-quality fuel, and considering aftermarket modifications such as performance impellers or intake grates. Consult with a professional for modifications.
Common signs of a failing impeller include reduced acceleration, unusual vibrations, and lower top speeds. Visual inspection may reveal damage or wear on the impeller blades.
To clean the hull, rinse with fresh water after each use to remove salt and debris. Use a mild detergent and a soft brush or cloth for stubborn stains. Rinse thoroughly and dry with a clean cloth.
When launching, ensure the trailer is backed into the water until the SuperJet floats. Start the engine and carefully move it off the trailer. For retrieval, align the SuperJet with the trailer, approach slowly, and guide it onto the trailer using minimal throttle.