I keep my boat in the water. My boat has not discharged water via the bilge pump switch in weeks. Today I took it out of the water and while I was strapping the transom, many gallons (maybe 20 gallons) of water came out. The engine compartment has been dry all of this time. The bilge pump alarm has been going off regularly, but willl not pump out any water so I thought the alarm had shorted. So, I thought there was no water. Where is the bilge? Below the engine compartment? Where is the bilge pump? Where and what is the sump pump? Thanks much for your time.