This wknd we were out riding and boat just died like it was outta gas. It started right back up but died when i would accelerate. Cruising was fine . just when i went over 25 mph. Had plenty of gas so thats not problem. Fuel filter looked fine so not sure if that is problem. Just replaced fuel pump 2 yrs ago so not sure if thats problem. got it outta the water and noticed a exhaust flap was missing. Could this cause it to just die or is that just a coincidence? Any Help ?