1. Welcome Hearth.com Guests and Visitors - Please enjoy our forums!
    Hearth.com GOLD Sponsors who help bring the site content to you:
    Hearthstone Soapstone and Cast-Iron stoves( Wood, Gas or Pellet Stoves and Inserts)
    Caluwe - Passion for Fire and Water ( Pellet and Wood Hydronic and Space Heating)

Diesel fuel tank leak

Post in 'The Gear' started by BrianK, Sep 7, 2013.

  1. BrianK

    BrianK Guest

    Hi folks,
    The diesel tank on my 9hp Yanmar log splitter engine sprang a leak this weekend. The tank looks like the one in the attached image.

    The diesel just pours out of it to the point its not usable until I fix it.

    I found a tank on Ebay but the price is ridiculous.

    The tank has a seam and it appears to be leaking at the seam at the bottom of the tank.

    Any ideas on repairing it?

    Attached Files:

    Helpful Sponsor Ads!





  2. Stihl_WoodBandit

    Stihl_WoodBandit Member

    Joined:
    Dec 24, 2008
    Messages:
    46
    Loc:
    West Central Ohio
    I have a 10 hp yanmar clone and I remember seeing $40 fuel tanks on ebay only a few months ago. But if your exact one is too much, I'd take it off, empty out the remaining fuel, dry the fuel residue up , wire wheel the paint off, and then mix up some JB weld or epoxy and put over the seam where the leak is.
    I used the same method on my 500 gallon diesel tank here at the house and its held for 4 years now.
  3. Stihl_WoodBandit

    Stihl_WoodBandit Member

    Joined:
    Dec 24, 2008
    Messages:
    46
    Loc:
    West Central Ohio
    Search "yanmar fuel tank" on ebay and you'll get 46 hits, a few of which are what u are looking for and less than $50
  4. MasterMech

    MasterMech Guest

    There are epoxy products that coat the inside of the tank to seal up minor leaks like that and prevent rust. Very common in antique tractor circles. I'm not recalling any product names at the moment but searching fuel tank coating or fuel tank epoxy sealer should yield results.
  5. BrianK

    BrianK Guest

    Thanks. I asked one of the EBay venders if the L100 tanks will fit my L90 motor and I'm waiting on a reply. They look the same and they are cheaper but I don't know if they are interchangeable.

    The only one listed as specifically for the L90 coming out of the USA was almost $100 including shipping. A lot of the listings were out of England. These must be more common over the pond.
    Last edited by a moderator: Sep 7, 2013
  6. BrianK

    BrianK Guest

    I found a discussion on some tractor forum via Internet search that highly recommended a product called Seal ALL. It's listed in one of the local auto parts stores so I will probably try that first.
    Fifelaker likes this.
  7. JustWood

    JustWood Minister of Fire

    Joined:
    Aug 14, 2007
    Messages:
    3,466
    Loc:
    Arrow Bridge,NY
    +1 on the epoxy. I've used it many times on diesel tanks. As stated getting it really clean is the key to it working well.
  8. Backwoods Savage

    Backwoods Savage Minister of Fire

    Joined:
    Feb 14, 2007
    Messages:
    27,816
    Loc:
    Michigan
    I've had good results with JB Water Weld.
  9. thetooth

    thetooth Member

    Joined:
    Aug 20, 2011
    Messages:
    76
    Loc:
    East Coast
  10. clemsonfor

    clemsonfor Minister of Fire

    Joined:
    Dec 15, 2011
    Messages:
    2,394
    Loc:
    Greenwood county, SC
    I was gonna say I have seen those on eBay before. Bit if there $100 I would coat the tank!!
  11. BrianK

    BrianK Guest

    I ended up buying one on EBay for a Yanmar L100 for $40 plus $10 shipping. I decided it was worth it for the sake of simplicity and a definite fix to just replace it. It was a direct swap which I figured out by researching part numbers from the various models. I got the old tank torn off and the fuel petcock and internal fuel filter swapped out and the new tank put on tonight.
    MasterMech likes this.
  12. shawn6596

    shawn6596 New Member

    Joined:
    Sep 7, 2013
    Messages:
    86
    Advanced auto parts has a fuel tank repair kit. It is a 2 part epoxy made for fuel. I believe it is under $10.

Share This Page