[cagrove]

I'm not sure about the layout of the 191FS and what may be under the floor but my 170CC has drains that go from the back corners of the deck into the bilge. I would think that as long as you don't hit anything below deck that you should be able to drill a couple of holes there to drain the water. You may even want to cut a larger hole and install a grate over it. However, if it were me, I would check with my dealer or the factory to make sure I didn't screw anything up BEFORE I drilled. Good luck.