Block stern tube hole in grp boat

Discussion in 'Fiberglass and Composite Boat Building' started by shepted, Mar 4, 2015.

  1. shepted
    Joined: Mar 2015
    Posts: 2
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Ireland

    shepted New Member

    Hi I need some advice, Im doing a project boat grp that had an inboard engine but i want to convert it to outboard engine. I have removed the shaft and stern tube but would like to know the best process to block or seal up this hole in the hull.
     
  2. PAR
    Joined: Nov 2003
    Posts: 19,133
    Likes: 488, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    Welcome to the forum.

    There's a few ways to do this, but the best is to make a plug of laminate ('glass and goo), thick enough to prevent water from penetrating the tube.
     
  3. gonzo
    Joined: Aug 2002
    Posts: 15,448
    Likes: 1,014, Points: 123, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    I have used a wood plug first, and then laminated the end.
     
  4. shepted
    Joined: Mar 2015
    Posts: 2
    Likes: 0, Points: 0, Legacy Rep: 10
    Location: Ireland

    shepted New Member

    Hi thanks for the advice i was thinking of making a wooden plug for it and then fibre glassing it in was just wondering is there another better method. Did you have any problems with leaks after doing yours that way/
     
  5. waikikin
    Joined: Jan 2006
    Posts: 2,383
    Likes: 151, Points: 73, Legacy Rep: 871
    Location: Australia

    waikikin Senior Member

    Pretty standard, bop in a tapered wooden plug, saw off, quick smooth up & grind to perimeter & add some resin & fiber to satisfaction.... sand & fair... story over & reversible.
    All The best from Jeff.
     

  6. PAR
    Joined: Nov 2003
    Posts: 19,133
    Likes: 488, Points: 93, Legacy Rep: 3967
    Location: Eustis, FL

    PAR Yacht Designer/Builder

    The ticket with this type of thing, is to have enough laminate to prevent water from getting in the tube. You can use your aunt Millie's mash potato salad as a plug, so long as there's sufficient laminate over the exposed end, to keep out pressurized water.
     
Loading...
Forum posts represent the experience, opinion, and view of individual users. Boat Design Net does not necessarily endorse nor share the view of each individual post.
When making potentially dangerous or financial decisions, always employ and consult appropriate professionals. Your circumstances or experience may be different.