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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."
The rule kicks into gear in 2011 for lawn and garden equipment of 25 horsepower or less, according to an agency release. For a full range of gas-powered personal watercraft and inboard and outboard engines, the rule powers up in 2010, the agency said.
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. The agency said the regulation also includes the first national standards for boats powered by stern-drive or inboard engines, and CO 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.