How to Fix the Skeg on My Outboard

The skeg on an outboard boat, is a piece of the stern and keel at the rear of the boat that can partially protect the motor's propeller. The skeg is made of fiberglass. Like some parts of the boat, the skeg is located below the waterline when the boat is in the water. Therefore, it is vulnerable to damages from underwater objects like logs, stumps or rock outcroppings. Before making this repair, the boat should be dry-docked and completely out of the water and the outboard motor should already be removed.

Things You'll Need

  • Hacksaw
  • Acetone
  • Rag
  • Sander
  • 36-grit sand paper
  • Fiberglass mat
  • Epoxy resin
  • Marine paint
  • Paint brush
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Instructions

    • 1

      Cut out the area around the damaged section of the skeg and file the edges with a metal file.

    • 2

      Wipe the area around the damage with a slightly damp rag. Then apply some acetone on a rag and wipe the entire area. Allow a few minutes for it to dry. This process will de-wax the surface, which will help with the fiberglass repair.

    • 3

      Sand the area around the damage with a rotary sander with 36-grit sandpaper.

    • 4

      Mark off the area around the damage with masking tape.

    • 5

      Cut pieces of fiberglass mat to fit the hole. The first piece should overlap over the damage by at least 2 inches on each side. Lay the first piece of fiberglass mat and then cover it with a layer of epoxy resin. Continue adding layers of fiberglass mat and epoxy resin until the damage is built up to be even with the rest of the skeg.

    • 6

      Sand the area again once the repair has dried. Apply marine pain with a paint brush to finish the repair.