I put mixed gas in a 4-stroke Yamaha waverunner...what do I do now? What damage will it cause?

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  • 5 months ago
    Favorite Answer

    Clean the plugs, assuming you have emptied the gas tank by now, intentionally, I would hope.

    • shirtshertshurt
      Lv 6
      5 months agoReport

      At least take them out and check to see if they are black or brownish. If you only ran the engine a little they may not be bad. And may look a little oily. But with a wire brush. Shouldn't take long.

  • 5 months ago

    Put mixed gas in my truck once by mistake- a bit of smoke, nothing else.

  • 5 months ago

    Drain the tank, clean plugs if you ran it, then run fresh fuel through

  • 5 months ago

    If I was you I would simply drain out the gas and put clean gas in it. It can foul the spark plugs and plug the gas filter. Besides that it's not going to cause any damage to your engine.

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  • 5 months ago

    It's going to foul out the spark plugs if it runs.

  • Anonymous
    5 months ago

    Not much, it will definitely smoke.

  • Anonymous
    5 months ago

    Drain it and put straight gas in. If you run it, apart from the smoke screen, it will foul the plugs.

  • .
    Lv 7
    5 months ago

    It will not damage the engine if you drain it and replace it with gas.

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