[Bigshrimpin]

gaulois - The original scuppers go down through the floor into a block of wood that is glassed to the hull and out the bottom of the boat. What you might find when/if you remove the marinetex patches is that the wood blocks may have deteriorated to the point where water leaks into the hull around the thru hull scuppers. Assuming that the previous owners weren't totally "coo-coo" . . . the marinetex/silicon fix might have just done the trick.