I believe the Aeromarine, autobailers have a small screen on the end of them that is inside the hull. I use shortened, Octura, autobailers in 2 of my boats now. They have no screen in em to get clogged. I shorten them in a lathe, by 1/2". This way you only have about 1/16", sticking out of the rear of the transom, and about 1/16" on the inside. (with a press/fit) Enough to run a bead of epoxy on. (The one on the left is stock) Never had an issue yet!

I love em, their GREAT!

Brian