Tomorrow, the National Marine Manufacturers Association (NMMA) kicks off a third summer season of alternative biofuel testing in an effort to further advance marine engine technology and find an alternative to fuel containing more than 10% ethanol as a result of its damaging effects on marine engines. The tests are funded by the Department of Energy which released a 2011 report on engines using E15 revealing performance issues like stalling, corrosion leading to oil or fuel leaks, increased emissions and damaged valves, rubber fuel lines and gaskets. These results reinforced the recreational boating industry’s concern that E15 is not a suitable fuel for boat engines.