Need some help from the engine gurus. Recently came home from vacation to find that the battery died on my BU (Monsoon) and since it rained it was full of water. Got the charger on it and got it started and water started spewing from what looks like some kind of pump toward back left side of the engine (if you are facing the stern) connected to the transmission. We immediately shut the engine off and continued to bilge. When all the water was out we restarted and there was no more spewing and everything is normal. What is this device that was doing said spewing and is it normal?