I had a 2015 A22 I found two ways you can do it. One is put the cooler in so the lid opens toward the inside of the boat (opposite the way you would normally put it or remove the hinges and the retaining strap and so the lid lifts off like the seat cushion.
Skibum wrote:
The factory cooler in my 2015 A22 is incredibly poorly designed. After removing the cushion above the cooler and the square corner cushion, the cooler lid opens 20 degrees before hitting the fiberglass in the back. I can't imagine a larger cooler in the same space.