Leave the expanding foam alone please! If you go down this route a) you will need alot and b) you will never be able to get to all the equipment and fuel tanks ever again.
Obviously you should not be getting that amount of water build up over such a short period of time, so finding the "leak" should be a priority. I dont think it will be the consol screws. On out Valiant, we had a small ingress of water in the bow area, between the base of the tubes and the hull. We had to get in to the anchor locker and seal from inside.
On another tack, why is your bilge pump not getting rid of this water? Is it not working (fix it) or if you dont have one, get one asap.