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  1. #1
    Join Date
    Jan 2010
    Location
    Scottsdale, AZ
    Posts
    136

    Default Water in the gas tank

    First time getting towed...ever. Good karma has its perks.

    So I have water in my tank. Don't know if it was a bad fill up or didn't do enough stabilizer. I never run the boat on land, never had an issue. This will change that. Either way...

    Have any of you ever heard of letting the boat sit (on a trailer) for over a week to let the gas/water separate then trying to drain from the bottom of the tank by suction? Its a FULL 30 gallon tank so draining 7 - 10 gallons may very well achieve the same results?

    Thoughts???
    '92 Mariah
    Kwahamot

  2. #2
    Join Date
    Aug 2009
    Location
    London, Ontario, Canada
    Posts
    1,187

    Default

    I routinely put stp gas treatment in my tank to remove the water, cheap and never had a prob in 10 years,plus stabil near the end of the season as well ass at the end when i'm winterizing it and toping off the tank
    2009 21v Worlds 340 Cat
    run your engine after you change the oil
    Doug

  3. #3
    Join Date
    Jul 2007
    Location
    Flowery Branch Georgia
    Posts
    2,742

    Default

    The water will separate within an hour of stopping. Go ahead with your plan to remove the fuel If possible try to get some samples in a clear bottle to see when you stop getting water.
    After you get out as much as you can add 2 bottles of Heet gas treatment it will combine with ant water that is left and allow the engine to burn it.

  4. #4
    Join Date
    May 2009
    Location
    syracuse Indiana
    Posts
    425

    Default

    DO NOT use HEET, this product contains alcohol, That is the problem. The alcohol in the HEET product absorbs the water, but the problem is when you use with ethonal fuel, the compounding alcohol attracts more water/moisture from the air. Just suck out the water, Don't you have a fuel/water seperating filter? If not invest in one and replace at least yearly, cheap insurance for fuel problems. These type of problems are not going away, especially for trailered boats which normally use automotive fuel, ie Ethonal. I recommend using Sta Bil Marine formula at every fill up. This is the blueish colored formula. Al

  5. #5
    Join Date
    Mar 2007
    Location
    Raleigh, NC
    Posts
    64

    Default

    After having had to replace a fuel pump due to corrosion, my mechanic suggested the same action as Beast496 recommends. Before that, I did not even realize there was a specific marine formula.

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