Have Boat Questions? Ask a Boat Repair Expert.
Check out the hatches drains as if one of them is blocked or disconnected it will end in the engine room.
What i mean is that all the opening hatches in the flooring of the boat as in the pic below have a gutter leading the water to a drain. Make sure this drain is not blocked as if the water overflows the gutter goes inside.
Ok then if not from there i don't know exactly the boat construction so i will opt out.