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Avoiding Water in Fuel Tank

Discussion in 'Engines' started by Judy Ingall, Mar 17, 2024.

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  1. Judy Ingall, Mar 17, 2024
    #1
    Judy Ingall

    Judy Ingall New Member

    Joined:
    Jun 29, 2022
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    Location:
    Tucson, AZ
    Hi All,

    I own a 2005 46 Sunseeker Portofino with twin Volvo TAMD75EDC High Performance engines. It is in water in Monticello, KY. Last fall in November, I filled her full of diesel fuel and winterized for the cold season. Unfortunately, I forgot to put stabilizer in the fuel tank and now I am worried about water in my diesel as I get ready to "de-winterize." I am new to keeping up with things like this on my engines (hubby would never have forgotten that detail!) Learned a lot last year about this boat and had a blast. Is there an additive that can be put into the tank now, after the fact, to reduce the chance of water/diesel bug? Should I pull a sample to see if it has water in it? She got a new bow cover, sun pad, rear cushion and a complete wash/wax/ceramic coating and looks spectacular now. Just don't want to tear anything up.
  2. K1W1, Mar 18, 2024
    #2
    K1W1

    K1W1 Senior Member

    Joined:
    Sep 30, 2005
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    If the tanks were full there is less chance of condensation than if they were empty. Do the engines have a clear bowl on the fuel filters? Water will show up here if there is some in the fuel. The biggest problem you may suffer from is if the fuel got cold enough to gel and has separated. I would hope that by November in that part of the country you would be getting winter weight diesel by default but one never knows.
  3. SplashFl, Mar 18, 2024
    #3
    SplashFl

    SplashFl Active Member

    Joined:
    Feb 2, 2021
    Messages:
    515
    Location:
    S. Florida _ Bertram 46
    I would check with the entity where you got the diesel. The company that delivers fuel here tells me the diesel already has an additive. If not you can always add but unless taking on some fuel at the same time it's questionable how well it will mix.