On my SSI OB, I'm able to get at the bilge in it's entirety (not sure about on an I/O). Looks like a channel is cut between ski locker and bilge to allow water to drain. They cut into the wood to open the channel under what I'm assuming is the tank platform . It's probably not typically a place where people look and looked a little rough (along with some small leftover wood pieces from the factory that water washed through), just wondering if anyone else has bumped into this.