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Thread: Fuel tank material

  1. #1
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    Question Fuel tank material

    I have another thread discussing fuel lines.

    Acknowledge that various persons prefer various materials, e.g. fiberglass/stainless steel/aluminium/aluminum/plastic, for fuel tanks.

    However I have come across persons using built in plywood tanks.

    These tanks apparently are NOT lined with fiberglass of other 'sealant/liner' and are left bare internally.
    The outside may be sheathed in fiberglass or maybe just at the joints.

    Wouldn't the gasoline would attack the glues in the plywood as well as soften the wood fibers causing them to separate and thus affect the carburetors and filters.

    Has anyone else heard of using plywood tanks?
    I live and drink rum where other people vacation.

  2. #2
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    Default Re: Fuel tank material

    The plywood is acting to both protect and keep in place a bladder tank.

  3. #3
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    Default Re: Fuel tank material

    Quote Originally Posted by Ian McColgin View Post
    The plywood is acting to both protect and keep in place a bladder tank.
    Apparently these guys don't even have bladder tank.
    I live and drink rum where other people vacation.

  4. #4
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    Default Re: Fuel tank material

    It sounds like a fundamentally flawed idea. Any fluid will eventually saturate the bare wood. There will be fumes passing through the wood, so if it isn't coated with a barrier on the outside, it will stink and must be in a well ventilated area. Diesel should have less softening effect on wood than gasoline with ethanol in it.

    http://forum.woodenboat.com/showthre...ss-diesel-tank
    http://www.duckworksmagazine.com/04/.../011/index.htm
    Management is the art of counting beans. Leadership is the art of making every being count. --Joe Finch

  5. #5
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    Default Re: Fuel tank material

    Diesel also saturates wood. My old schooner Goblin would not hold her topside paint in one spot. Turned out that the bed logs supporting the cockpit wing tanks held the moisture that (Goblin was over 60 years old) allowed some pit rusting through the sheet steel tank, wicking the diesel along the grain to the hull and causing a major stretch of plank to be saturated as in tap and the wood sounded "splat".

    I really cannot believe no bladder. If that's the way they are going, stand by to let the Darwin Award folk know.

  6. #6
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    Default Re: Fuel tank material

    Wood to hold gas without a bladder? Ian nailed it - contact the Darwin award folks.
    "If it ain't broke, you're not trying." - Red Green

  7. #7
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    Default Re: Fuel tank material

    Quote Originally Posted by Garret View Post
    Wood to hold gas without a bladder? Ian nailed it - contact the Darwin award folks.
    I will try and get more information of this.
    I live and drink rum where other people vacation.

  8. #8
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    Default

    Goblin was probably not ply. Wouldn't the glue lines in ply act as an impermeable barrier?

    Sent from my CPH1851 using Tapatalk

  9. #9
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    Default Re: Fuel tank material

    You can make plywood tanks and then encapsulate in glass and a special resin. Hatteras (and others) used to do this.

    However, someone could weld you up a custom sized tank for about the same expense, especially if you factor your time ( which, I realize, you may not, given the DIY ethos of Forumites)

    Kevin
    There are two kinds of boaters: those who have run aground, and those who lie about it.

  10. #10
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    Default Re: Fuel tank material

    Quote Originally Posted by Phil Y View Post
    Goblin was probably not ply. Wouldn't the glue lines in ply act as an impermeable barrier?

    Sent from my CPH1851 using Tapatalk
    Fuel, gasoline or diesel will eventually or sooner saturate and weaken unprotected plywood or solid wood. Seen it and repaired it. I hold any wooden boat with an inboard engine in suspicion, especially one without an adequate drip pan or protection under the engine.
    Tom L

  11. #11
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    Default Re: Fuel tank material

    The LAST place i’d experiment with methods and materials in boat construction is in fuel systems.
    You can swim away from structural failures. Explosions, not so much.
    Follow the ABYC standards.
    Last edited by JimConlin; 06-07-2019 at 09:34 PM.

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