I pulled the Coot out last month to wash the bottom and touch up the bottom paint. Right at the waterline, back about four feet from the bow there was a half-inch divot gouged out, with bare plywood showing, and a crack a few inches long running aft of the hole. It looks like I hit something hard, maybe a bolt head mounted on something heavy. Water oozed out of the crack when I pressed on it.
The plywood was very wet. To see the extent of the water intrusion, I figured the plywood would have swelled where it was wet, so I sanded the whole area with a longboard. The sanding took off the bottom paint wherever the wood was swelled. I’m kind of proud of this idea.
When I decided the wood was dry, I soaked the bare wood with warm neat epoxy until it wouldn’t soak up any more, then laminated small pieces of 6 ounce fiberglass cloth to fill the depressed area flush. When that was firm, I smoothed the area with QuickFair, then sanded that nice and flat.
My only concern with this fix is that water may have leaked past the area I cleaned and dried, and now it’s locked inside, brewing dry rot. I kind of wished I’d soaked some penetrating epoxy in the area before filling it. I guess I’ll know in a few years if I should have done that. By the way, there’s a watertight compartment behind this area. I would not have sunk even if I’d been holed through.