I went fishing this weekend and I noticed that every time I stop after making a run that water is coming up and literally flooding the back of the motor where the cowling hooks to the bottom of the motor. When I trim it all the way up water is draining out of the cowling. I tried giving the throttle gas right before I come to a stop but it doesn't help. I have had the boat for almost a year and never had this problem before, the only thing that is different is that I filled both gas tanks up. Any suggestions?