I disagree with Bushwacker. Your this deep, rip that sucker outa there and replace it with new material. You are this deep, might as well do it all. I shaped up a 2X6 piece of lumber to match the original. Mixed up a couple quarts of cabosil to take up the grinding nicks and voids below it, made some nice smooth 45deg fillets on the sides, and then glassed the heck out of it with 6in 1708 tape.
When they popped these hulls out of the mold they drilled 1/2in holes thru the center stringer to grab it, then never sealed them back up. My keel stringer was actually cracked at one of those holes. Also when they rot they DO allow the hull to flex then the hull will crack right beside the stringer. Ask me how I know... this is what sunk my Mako 2 years ago.
