Hi all. So I was out at the island today, up on plane, when the outboard just decided to start raising itself out of the water. Even once it got to full "up," it kept trying to go higher. Hitting the "down" button on either the throttle lever or the outboard stopped the tilt from trying to raise the outboard, but didn't lower it. I finally disconnected the battery just so the tilt motor wouldn't burn itself up, and when I got home and reconnected the battery, everything seems fine. Any ideas what would cause that? Thanks.