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  1. #1
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    Jun 2004
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    Loose lag bolts on trailer bunks

    I replaced and recarpeted the bunks on my trailer and it looks great. But I drilled the holes for the 3/8 lag screws too large and they are not staying tight. I know I can repossiton and redrill the bunks. Before I take that route, it there any kind of shim or filler I could put in the holes and then put the lag bolts back in? I looked at using bigger lag bolts, but the next size in 1/2 inch and I would have to redrill the trailer brackets. Thanks, Ed

  2. Electrical/Wiring/Trolling Motors Moderator CatFan's Avatar
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    Jun 2004
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    SW Indiana
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    #2

    Re: Loose lag bolts on trailer bunks (emfjr01)

    I think I'd put some marine epoxy in the holes, and snug the bolts. Should hold when it cures.

    If that doesn't work, try flipping the bunks around or swapping sides. I know a guy who did about the same thing once and, umm...HIS boat had different overhang front to back so the holes were in different places. Drill new holes and you are good to go. I'd fill the old holes with a sealer if you go this route.
    If you have integrity, nothing else matters. If you don't have integrity,
    nothing else matters.​

  3. Member tcesni's Avatar
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    Apr 2005
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    Smith Mountain Lake, VA and a cottage in Ontario
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    #3

    Re: Loose lag bolts on trailer bunks (emfjr01)

    Fill the holes with a piece of dowel using exterior glue or construction adhesive and redrill after it has time to dry.

    2018 Ranger RT188 SC Black/115 hp Yamaha SHO 4-stroke; Garmin LVS34/Ultrex Quest - SML
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  4. Member
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    Sep 2005
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    Dirty South
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    #4

    Re: Loose lag bolts on trailer bunks (emfjr01)

    I never drill a pilot hole, I just use an 18V drill with a good extension and screw em up in.


  5. Member
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    Mar 2007
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    duncan
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    #5

    Re: Loose lag bolts on trailer bunks (tcesni)

    yep drill out the hole larger and then put a dowel in with super strength epoxy

    redrill and you are good to go


  6. Member
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    Jun 2004
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    Greensboro
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    #6

    Re: Loose lag bolts on trailer bunks (emfjr01)

    I had plenty of bunk board length so I moved the bunks up an inch and redrilled the pilot holes for the lag screws unsing a much small bit. I think that will work. At least for now the lag screws are tight. I filled the old holes with waterproof wood glue. Those hole are under the trailer bracket. Ed

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