I recently installed a sea strainer on my 81 AMskier that never had one. The lake here is full of plant growth/algae/snakes/alligators. Here's a pic of the screen in the strainer after one day out on the lake. This is the best addition to the boat in years. If you don't have one on your boat you should order one from RonT. They are not that expensive and it takes about ten minutes to install. It has been said before, but all of these boats should have come with these standard.
-Matt