metal gas tank preservation

  • castle-rock-clown
    Posts: 2596
    June 15, 2013 at 5:08 pm #1239395

    I’ve changed from 6 gal metal outboard gas tanks to plastic. I want to keep the old ones in long term unheated storage. What should I put in them to prevent rust but, still not have sludge or gumming issues?

    blackbay
    Posts: 699
    June 15, 2013 at 6:40 pm #1178044

    Your best bet is to use a gas tank sealer. They are regularly used on classic cars but come in motorcycle tank sized kits also. You might want to look into that.

    deertracker
    Posts: 9241
    June 16, 2013 at 2:52 pm #1178120

    I tried posting a link but im on my phone and its not working. Google Kreem fuel tank sealer. Ive seen it used with great results. I believe it put a plasric like coating in the tank.
    DT

    TheFamousGrouse
    St. Paul, MN
    Posts: 11666
    June 17, 2013 at 4:34 pm #1178283

    I wouldn’t go nuts. Clean off the outside of the tank including the bottom using degreaser. Drain all gas completely and store with the lid off.

    The biggest thing is not to leave them sitting on a concrete floor.

    Grouse

    suzuki
    Woodbury, Mn
    Posts: 18631
    June 17, 2013 at 4:38 pm #1178285

    I recently made the mistake of letting a nice metal can sit for 15 years with lid on. The stuff that grew in there was awfull. I ended up buying a new tank and let me tell you the new tanks SUCK. Recent EPA regulations have eliminated venting on portable tanks which is the stupidest thing I have ever seen.

    castle-rock-clown
    Posts: 2596
    June 18, 2013 at 1:59 pm #1178467

    What about storing them with diesel fuel in them, what does diesel do after longer periods? as far as the new epa plastic tanks which I have switched to also, I just drill a 1/32nd inch hole on the underside of the cap, no more preasurization problems and no leakage.

    suzuki
    Woodbury, Mn
    Posts: 18631
    June 18, 2013 at 3:40 pm #1178489

    Quote:

    What about storing them with diesel fuel in them, what does diesel do after longer periods? as far as the new epa plastic tanks which I have switched to also, I just drill a 1/32nd inch hole on the underside of the cap, no more preasurization problems and no leakage.

    I like that idea. Not sure I understand exactly where you drill the hole but it doesnt sound like through the top of the cap?

    castle-rock-clown
    Posts: 2596
    June 18, 2013 at 11:02 pm #1178638

    The caps click when tightened like on cars. On the underside you see a one-way valve. I drill a hole opposite the valve on the underside only through the first surface. If it were not a good result you could screw a brass screw into the hole to reseal the hole.

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