...and he filled tanks feeding the boat’s 200 horsepower Mercury engine with gas that had been blended with 10 percent ethanol. “I heard a station in Greenville had straight gas, but I just took it to the next one I could find. Within 10 minutes, my engine started failing,” Gray said. “(The ethanol) had crystallized and crumbled and had clogged my fuel line, and I had to tear out all of the fuel system.” Gray saved hundreds of dollars by repairing it himself, but his troubles with the motor are nothing new to marine shop owners, lawn mower mechanics and...