Greenhouse gas emission testing completed on marine engines

Published online: Apr 20, 2011 News Boating Industry
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The National Marine Manufacturers Association recently reported that Marine Engine Emissions Greenhouse Gas tests have been successfully completed for stern drive/inboard and outboard engines, with the Environmental Protection Agency accepting NMMA's proposed emission factors in its final report. 

Marine engine manufacturers conducted these tests following a final 2009 EPA rule that required engine manufacturers to report emissions of carbon dioxide (CO2), nitrous oxide (N2O), and methane (CH4). Small business engine manufacturers, defined as having fewer than 500 employees, are exempt from this reporting requirement. The EPA greenhouse gas testing requirements specify that catalyzed engines will need to report N2O and CH4 emissions by model year 2012. Non-catalyzed engines will need to report CH4 emissions only. CO2 emissions will be reported in 2011. 

The group said stern drive and inboard pilot tests were conducted in August with one on the Fox River in Illinois and one on Lake Michigan in Waukegan, Ill. This was followed by an additional 12 tests of a full line of catalyzed stern drive and inboard engines in October on the Fox River. All tests were conducted by a third-party consultant. Outboard boat data was collected separately in specially-designed test cells. 

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