vessel one was coming up on plane. The vessel was struggling to come up. The operator stopped and trimmed the motor down. On his second attempt, the nose went under water and the boat rolled over. A 18 gallon fuel tank had been mounted in the bow changing the characteristics.  The operator died from a heart attack. operator of vessel 1, had a tracheotomy due to a previous heart Condition and surgery that he had. He was morbidly obese at 350+ pounds. When the boat capsized he went in the water and was rescued by a passing boater. Upon being pulled out of the water, he had a heart attack and died. He did not ingest water through the tracheotomy tube.