Water in my fuel tank

Discussion in '2017 Saltwater Fishing Reports' started by salmon slayer, Jul 14, 2017.

  1. salmon slayer

    salmon slayer Member

    I justfound out after trouble shooting that I have a large amount of water in my fuel tank. When winterized each year (boat is 10 yearsold) I would put fuel conditioner in and make sure the tank was full. Every spring I would replace the water fuel separator filter. This has built up over time and or possibly some bad gas at that fill up.

    Is there anything you can add when fuelling up to minimize or eliminate this problem in the future?
    What do others do?
  2. big rock

    big rock Member

    Sounds like you are doing all the right preventative maintenance on your fuel system. I would keep track of were you are fueling up sounds like contaminated fuel from gas station.
  3. triplenickel

    triplenickel Well-Known Member

    Could there be a leak somewhere? Filler cap, sending unit inspection cover, vent plumbing or something along those lines? Do you fill up in remote low volume locations or high volume spots?
  4. casper5280

    casper5280 Well-Known Member

    I would check your filler cap also. Great spot for water getting in.
    SteelyDan likes this.
  5. Mozart

    Mozart New Member

    I've found out no matter if tank is full or not I get water in my fuel tank after winter. My boat is kept outdoor the cold nights and warm days seems to create condensation and would deposit water in the fuel tank. I've tried different fuel stabilizers to no avail. Until I tried adding methyl hydrate into the tank and that has taken care of the problem.

    Depending on your fuel line setup you might have another option. Mine is fuel tank to T split one goes to main engine and the other goes to outboard. If I don't have methyl hydrate at home or forgot to bring one with me on trip I would pump out about 3 L of fuel from outboard engine fuel line and that seems to work too.

    Hope that helps.
  6. Old Blue

    Old Blue Active Member

    I know working up north if you don't fill up your truck nightly then condensation builds when the sun and temperature drops up in the empty space in your tank....might work for your boat too along with the usual conditioner/seafoam
  7. salmon slayer

    salmon slayer Member

    How much methyl hydrate per litre do you add
  8. Mozart

    Mozart New Member

    I add 1 litre to my 90 gallon tank so that's about 1 litre methyl hydrate to 340 litres gas
  9. albernifisher

    albernifisher Well-Known Member

    I used to keep my boat at my dad's house. We were heading out one morning and since I live a hour away he though he would help out before I got there by filling the gas and water tanks, only problem was he filled the fuel tank with water and water tank with fuel.
  10. noluck

    noluck Active Member

    got to love it when they try to help,
  11. SteelyDan

    SteelyDan Well-Known Member


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