I took my family out today in my Bayliner Jazz today. I got stuck on a sand bar (didnt see it or know it was there). After freeing myself, i continued on back to open water and the moter died. I think it overheated (strange?). I was able to restart after much effort (and lots of start fluid) seems to run fine, and then quit again. I radioed someone to tow me in, started the boat again and trailered. After out of the water i inspected the grate, and it was not obstructed. Question-What happened, and how do i fix????? Thx