How to Install an Inspection Port in Sunfish

Inspection ports are removable deck plates on boats that allow you access to the inside of the hull. You might want to install an installation port to access the hull for repairs, or to create a storage area using an attached "cat" bag. You should choose where you want the port carefully before you cut a hole in the hull of your boat, which cannot be undone.

Things You'll Need

  • Center punch
  • Hammer
  • Compass
  • Drill
  • Drill bit, 3/8 inch
  • Sabre saw
  • Marine caulk
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Instructions

    • 1

      Mark the center of the port by tapping a center punch with a hammer on the hull of the boat.

    • 2

      Set a compass to a diameter corresponding to the port's manufacturer's recommendations. Place the anchor of the compass in the punched hole. Draw a circle on the hull.

    • 3

      Drill a 3/8 inch hole just inside the circle.

    • 4

      Cut from the hole around the perimeter with a sabre saw fitted with a metal cutting blade. You may require more than one blade. Dry-fit the port into the hole to check the hole size is correct.

    • 5

      Spread a thick layer of marine caulk around the edge of the hole. Insert the port into the hole and turn it a quarter turn to seat it properly in the caulk.

    • 6

      Drill a hole in each screw hole placing in the port. Secure the port by putting a bit of marine caulk in the hole and screwing in the screw. Do the same on the other side of the port.