That is what I put on my boat this year.......took it out for a shakedown run last weekend and had water shooting up a foot high out of the floor of my boat. I think my outlets are a little close to the side of the hull.The water comes around the corner while running, and the scuppers catch the water and pump it onto the deck....
I will try turning them a quarter turn next weekend and see how that works. On the bright side the water ran out FAST after I stopped.