This may seem a bit heretical, but after sailing "Sinbin" upwind from Angel Island to Fortman Basin against a front, I decided I was sick of bailing. So, we sealed the plug with Sika flex, beefed up the transom from the inside with glass and plywood backing plates, bought an outboard bracket from West, and hung the outboard off the transom. That was in 1995. Three outboards and a standing rigging later, "Sinbin's" transom is still intact. Down below, she is dry as a bone.