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replacing springs on boat trailer

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  • replacing springs on boat trailer

    Im getting ready to put on new springs, my question is the axle is on bottom of leafs with square u-bolts going over the spring and not the axle itself with plate on bottom, this does not look right, should the u-bolt go over the axle from bottom and have plate on top? see pic

    cant post pic

    Last edited by Brentgale; October 4th, 2017, 02:21 PM.

  • #2
    The pic shows the right way.


    • #3
      This is how my spring(broken) was attached at the factory
      Click image for larger version

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      • #4
        Over or under is fine. Just depends how high you want your trailer sitting and if you got proper clearance for your tires. Jimmbo was your trailer new or how long after till your spring broke ?
        2004 Caravelle 187


        • #5
          The 'over/under' isn't the issue, it's the orientation of the U-bolts... I don't think it really matters the way they're oriented, what DOES matter is if the spring and axle are different widths, the U-bolt should wrap the one it fits best...
          1988 SkipperLiner 53x14 - - - 2002 Regal 2860 Commodore

          1995 SunTracker 32' Party Cruiser - - -1987 Sea Ray 21' Seaville Midcabin


          • #6


            • #7
              when I did mine i went under to lower the center of gravity. I also added larger wheels/tires so really needed to. If that is not a concern for you then one thing to consider is I made sure mine was high enough that if I forget to tilt the lower unit up it will not drag.

              My thread was fairly inclusive a complete rehab with all sort of stupid questions fomr me. Might run thru it. The pics may not show up for you unless you've added the extension to Chrome for the photobucket workaround


              1979 Carver Montego 2357 | 260 Mercruiser upgraded to Alpha | 2006 Nissan 15hp kicker

              Girls cry and boys fart in front of friends, but girls fart and boys cry in front of true friends.


              • #8
                Over or under does matter most of the time actually. Most axles have a locating dowel or a flat mounting plate that must be located against the spring, AND the axle is always "cambered" (bowed) up in the center.

                To keep the locating dowel/plate against the spring, with the axle cambered/bowed "up", you have no over/under choice. The axle is set up for either over or under. To change it will require welding mods - or a different axle.


                • #9
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                  thanks for the help guys, my original post was not a question over/ under on the axle but the u-bolts were over spring rather than axle plus the plate was on bottom of axle this axle has dowel on top.. the original set up slid forward on one side plus axles springs were different, im thinking somebody just replaced one.
                  the trailer sits level now and axle is not cocked forward like before.

                  axle done pic https://imgur.com/a/6fFBp

                  old springs https://imgur.com/a/3VhJZ

                  original setup that slid on spring