Yamaha SuperJet Waverunner 2018 Owner's Manual
![Yamaha SuperJet Waverunner 2018 manual cover](/images/eead552cb6e5cc02b043ca60/thumbs/thumb175x175.webp)
The recommended oil for the Yamaha SuperJet Waverunner 2018 is Yamalube 2-W, a two-stroke engine oil designed specifically for Yamaha watercraft.
Regular maintenance should be performed every 50 hours of operation or at the start of each season, whichever comes first. This includes checking and replacing oil, inspecting the spark plugs, and ensuring all systems are functioning properly.
If your Waverunner won't start, check the battery to ensure it is charged, verify that the fuel is fresh, and inspect the spark plugs for wear or damage. Additionally, check the kill switch and ensure it is properly engaged.
To winterize your Waverunner, drain any water from the engine, add fuel stabilizer to the fuel tank, remove the battery and store it in a cool, dry place, and cover the Waverunner to protect it from the elements.
To flush the engine, connect a garden hose to the flushing port, start the engine, and then turn on the water. Run the engine at idle for about 5 minutes, ensuring the water flows through the system to remove salt and debris. Turn off the water before stopping the engine.
To check the spark plugs, remove them using a spark plug wrench, inspect for signs of wear or carbon build-up, and clean or replace them as necessary. Ensure they are properly gapped before reinstalling.
The recommended fuel for the Yamaha SuperJet Waverunner 2018 is unleaded gasoline with a minimum octane rating of 86. It is advised to avoid ethanol-blended fuels above E10.
First, check that the cooling water intake is not blocked. Ensure the cooling lines are free of debris and the thermostat is functioning correctly. Inspect the impeller and cooling passages for damage or blockage.
Store the Waverunner in a dry, cool place, preferably indoors. Use a cover to protect it from dust and moisture. Ensure the fuel system is stabilized, the battery is removed, and the engine is properly winterized.
To improve performance, regularly maintain the engine and hull, use high-quality fuel and oil, and consider upgrades such as performance impellers or intake grates. Ensure the hull is clean and free of damage for optimal water flow.