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Thread: Need new tank

  1. #1

    Default Need new tank

    Does anybody have any recommendations on where to find a new tank? I would like to mount it in the original area. A restoration specialist I spoke to recommended stainless, but not where to get it. If someone makes a poly, I would not be unopposed to that also. This is for a M725. This is my first post. This is my first fix up.
    Thanks for any help.
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  2. #2
    Join Date
    Jan 2011
    Location
    Fernandina Beach, FL
    Posts
    3,689

    Default

    You might check out our member Mike. He makes tanks for the M-715. I do not know if the tanks are the same, the rubber fill neck is not.

    New Repro Stock Fuel Tanks for sale

  3. #3

    Default new tank

    Thanks for the info, Don. Much appreciated.

  4. #4
    Join Date
    Jan 2011
    Location
    Fernandina Beach, FL
    Posts
    3,689

    Default

    I looked briefly at the -34P TM. There are two listings for the rubber fill hose (one for the M-725 and one for the M-715?). But only one number for the tank. So, they may be the same. Later today, someone will know the answer.

  5. #5
    Join Date
    Jun 2014
    Location
    Eastern Maine
    Posts
    377

    Default

    There are a couple of used ones on ebay, pricey though. I believe the tanks are the same just the filler neck is different.

  6. #6
    Join Date
    Jan 2011
    Location
    Fernandina Beach, FL
    Posts
    3,689

    Default

    Quote Originally Posted by m38inmaine View Post
    There are a couple of used ones on ebay, pricey though. I believe the tanks are the same just the filler neck is different.
    That is my impression as well. But a few of our members have both trucks and can let us know for sure.

  7. #7
    Join Date
    Aug 2015
    Location
    Portlandia, Oregon USA
    Posts
    202

    Default tanks are the same

    I swapped my original M725 tank for an M715 tank I bought on ebay (that looked to be close to new inside and out).
    Side by side the tanks are identical in all respects. If it helps, this is what I've discovered about the difference between the 725 and 715 filler neck rubber:

     The Ambulance rubber filler was never reproduced and only one source in Greece exists that still sells what appears to be an NOS one. There’s lots of opinions on here about how long these factory 50 year old NOS rubber filler necks last when they are placed in contact with modern fuel.

     The metal M725 fuel filler neck frame is not the same as the M715 filler neck. Its design is different.

     The ambulance filler neck rubber tube has a 45 degree bend while the M715 has more of a 90 degree bend

     For all those reasons, the M715 NOS and reproduction necks don’t fit the ambulance at all. I wouldn’t even try to force one to fit.

     The factory gas tank inlet measures 3.00” OD and the factory metal fuel filler neck metal frame measures 4.25” OD.

     Very few composite rubber tube products are both fuel resistant and come in the sizes we need (but I dug into it and found some).
    1969 M725 ambulance

  8. #8
    Join Date
    Jun 2014
    Location
    Eastern Maine
    Posts
    377

    Default

    Thanks for posting this information, should be a sticky.

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