Plastic Fuel Tank Repair

Discussion in 'Mechanic and Repair' started by Sprinkler Buddy, Dec 8, 2012.

  1. Sprinkler Buddy

    Sprinkler Buddy LawnSite Bronze Member
    from Florida
    Posts: 1,187

    I have an old 2hp boat motor that has a crack in the fuel tank. What over the counter products have you guys used for repairs? The motor is very old and they don't make this fuel tank anymore.

    Thanks
     
  2. agrostis

    agrostis LawnSite Silver Member
    Posts: 2,268

    2 HP ? What is that, a trolling motor ? A cracked fuel tank, for a boat ? Time for a new motor if you can't find a tank. I wouldn't trust any repair for something that hold's gas.
     
  3. DEPENDABLE LANDSCAPING

    DEPENDABLE LANDSCAPING LawnSite Bronze Member
    Posts: 1,343

    We have used jb weld on a few tanks. It has held well for us.
    Posted via Mobile Device
     
  4. Sprinkler Buddy

    Sprinkler Buddy LawnSite Bronze Member
    from Florida
    Posts: 1,187

    Yes it's a boat motor, use it on a 10 ft john boat. Runs like a top.

    The JB weld for plastic that I found, says not to use on gas tanks. I did find a product called Seal-All, it's Gas & Oil resistant. Going to give it a shot.

    I empty the fuel tank when not in use, so this might work. Think I'll try fixing my cracked windshield wiper reservoir on the work truck too.
     
  5. rlitman

    rlitman LawnSite Bronze Member
    Posts: 1,539

    No adhesive will work on a gas tank. Don't bother.

    If the tank is plastic, it can possibly be plastic welded.

    Was the crack due to damage, or do you not know how the crack happened?
    I ask, because if it was just a plastic tank that got hit, you can weld the crack shut, but if it is old sun-damaged plastic, one crack may be just the tip of the iceberg.
     
  6. Sprinkler Buddy

    Sprinkler Buddy LawnSite Bronze Member
    from Florida
    Posts: 1,187

    It appears it may have been dropped at some point in time. It was left at a home my mom had recently bought. I cleaned the carb, put a little gas in it, fired up first pull.

    The tank itself is covered, so I don't think it was caused from sun damage. Doesn't appear or feel brittle in the least.

    I already repaired it with the Seal All. To late not too. lol If it doesn't work, I'll look into getting it plastic welded. Thanks for your input.
     
  7. rlitman

    rlitman LawnSite Bronze Member
    Posts: 1,539

    Well, if the gas causes the glue to fail, it will probably just peel off, so that shouldn't stop you from welding the plastic down the road. The bigger issue with welding a gas tank, is the hazard of the gas itself.

    There's a big difference between "gas resistant", and something that can be used to repair a gas tank, but please report back in a few months, if your results were successful.
     
  8. AI Inc

    AI Inc LawnSite Fanatic
    Posts: 25,298

    Can you take it off , wash it out real good and hit it with a propane torch and try to melt the plastic together?
     
  9. Sprinkler Buddy

    Sprinkler Buddy LawnSite Bronze Member
    from Florida
    Posts: 1,187

    Will do after we have used it a bit. Fingers crossed. lol
     
  10. mcdc6

    mcdc6 LawnSite Member
    Posts: 33

    Fiberglass. Never had a problem yet. Fixed all kinds of tanks that way. Just prep, prep and prep again.
     

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