EPA tightens engine standards on surf and turf

Published online: Sep 11, 2008 News EPA
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"EPA's new small engine standards will allow Americans to cut air pollution as well as grass," said EPA Administrator Stephen L. Johnson. "These standards help fight smog in our neighborhoods and waterways as we continue to improve the environmental landscape."
When fully implemented, the rule will yield annual emission reductions of 600,000 tons of hydrocarbons, 130,000 tons of nitrogen oxide (NOx), 5,500 tons of direct particulate matter, and 1.5 million tons of carbon monoxide (CO). EPA expects the new standards to save approximately 190 million gallons of gasoline each year.
The rule kicks into gear in 2011 for lawn and garden equipment of 25 horsepower or less. For a full range of gas-powered personal watercraft and inboard and outboard engines, the rule powers up in 2010.
To meet the new exhaust emission standards, manufacturers will likely employ catalytic converters for the first time in many small watercraft and lawn and garden equipment. After rigorous analysis and work with stakeholders, EPA determined this strategy was feasible and safe. This regulation also includes the first national standards for boats powered by stern-drive or inboard engines, and carbon monoxide standards for gasoline-powered engines used in recreational watercraft.
Non-road gasoline-powered engines, such as those used in lawn and garden equipment, will see an additional 35 percent reduction in smog-forming hydrocarbon (HC) and NOx emissions. These cuts go beyond the 60 percent reduction that saw final implementation two years ago under an earlier rulemaking. The updated engines will also achieve a 45 percent reduction in fuel evaporative emissions.
Recreational watercraft powered by gasoline engines will incur a 70 percent reduction in HC and NOx emissions, a 20 percent reduction in CO and a 70 percent reduction in fuel evaporative emissions.
Each year, Americans spend more than 3 billion hours using lawn and garden equipment and more than 500 million hours in recreational boating. As a result, the total estimated public health benefits range between $1.6 and $4.4 billion by 2030. These benefits outweigh estimated costs by at least eight to one, while preventing over 300 premature deaths, 1,700 hospitalizations, and 23,000 lost workdays annually.
The rule opens another chapter in EPA's success story of curbing emissions from non-road sources. EPA has recently set stringent emission standards for farm and construction equipment, off-road recreational vehicles, and for locomotives and commercial marine sources.

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