This little jewel mounts on the top of the jet pump bowl and lets out the air that can get trapped in the pump when it is lunched.
Ever had to rev your engine to get the boat to move when you first put it in the water? Then you need one of these. Especially if
you have a good tight pump, or a droop snoot. It bleeds off the air so you are ready to go and closes as you take off.
Very simple to install. Comes with instructions.