Fixing a Leak on Wooden Mk1 – 12934

GP14 Sailing Forums Forum Fixing a Leak on Wooden Mk1 – 12934

This topic contains 5 replies, has 3 voices, and was last updated by  steve13003 6 days, 19 hours ago.

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  • #16609

    Dunc Llew
    Participant

    Have tried to fix a leak in a wooden GP by drilling holes around the Hog (from underside of boat) and filling with epoxy. After four attempts, it’s not worked! Any more suggestions? Number 12934 so probably not worth a professional repair so if I can’t fix, then it looks like it’s spares or repairs. Looked through previous postings but couldn’t find anything. Wondered if maybe the balers were causing it?

    Thanks

    • This topic was modified 2 months, 2 weeks ago by  Oliver Shaw.
  • #16614

    Oliver Shaw
    Moderator

    First,  please try to identify more precisely where the water is coming in.

    E.g. is it between plywood and hog,  or via a split in the plywood,  or between hog and centreboard case,  or through splits in the centreboard case,  or past the centreboard pivot bolt,  or via the self-bailers,  or via the transom flaps?

    One way to attempt to ascertain this is to get the boat fully dry,  remove the floorboards,  then launch her,  and immediately look to see where the water first starts to appear.    If that fails,  or if you need an additional check,  bring her ashore again,  put her on her launching trolley or otherwise support her,  get the outside of the hull dry,  then put a little water inside her  –  just two or three inches depth,  and see where it comes out underneath.

    Once we know where the leak is we may be able to advise,  but until we have that information there is not a lot anyone can do by correspondence.

    Hope this helps,

     

    Oliver

  • #16979

    Dunc Llew
    Participant

    Oliver

    Took floor boards off this weekend and launched onto water. Looks like the water is coming in from the two holes either side of the mast – not the holes with bungs in, the two smaller ones. Any ideas? Thanks.

  • #16980

    Oliver Shaw
    Moderator

    I am not entirely clear what holes you mean;   can you post photos,  please?

     

    Oliver

  • #16982

    steve13003
    Participant

    As Oliver says there should not be any holes either side of the mast, your boat should have a built in front tank for buoyancy and there will be one or two holes with bungs in the bulkhead in front of the mast.  Have you checked inside the buoyancy tank for water?  If you have leaks around the mast step area have you check for leaks with tension in the rigging? Presuming you have the original mast step with a square fitting at the bottom of your mast. Series 1 boats are prone to splitting the hog / keel joint under the mast step if high rigging loads are used – the preventive measure is to fit a load spreading mast step conversion which distributes the mast load into the centreboard case and forward towards frame 1, but first the leak needs to be fixed before fitting the new mast support (drawings from the GP Office).

    I have attached some pictures of an old GP No 13003 with the modified mast step, showing the finished work and the drain bung in the forward bulkhead – but you will need to fix the leak before fitting the new mast step. Also once complete you need to have the work checked by a class measurer and the details entered on to the boats certificate.

  • #16983

    steve13003
    Participant

    As Oliver says there should not be any holes either side of the mast, your boat should have a built in front tank for buoyancy and there will be one or two holes with bungs in the bulkhead in front of the mast.  Have you checked inside the buoyancy tank for water?  If you have leaks around the mast step area have you check for leaks with tension in the rigging? Presuming you have the original mast step with a square fitting at the bottom of your mast. Series 1 boats are prone to splitting the hog / keel joint under the mast step if high rigging loads are used – the preventive measure is to fit a load spreading mast step conversion which distributes the mast load into the centreboard case and forward towards frame 1, but first the leak needs to be fixed before fitting the new mast support (drawings from the GP Office).

     

    Steve Corbet

    • This reply was modified 6 days, 8 hours ago by  Oliver Shaw. Reason: Removing formatting commands

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