On this page:

• Rule Summary
• Rule History
• Additional Resources

Rule Summary

The Environmental Protection Agency (EPA) is establishing new requirements to reduce emissions of hydrocarbon (HC) and oxides of nitrogen (NO_x) from nonroad small spark-ignition engines below 19kW (“Small SI engines”) and marine spark-ignition engines (“Marine SI engines”). This rule includes exhaust and evaporative emission standards for these engines as well as related gasoline fuel tanks and fuel lines. This final rule also includes a wide range of amendments to other highway and nonroad programs.

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• Final Rule (PDF)(348 pp, 3.7 MB, published October 8, 2008)
• Final Regulatory Impact Analysis (PDF)(808 pp, 7.13 MB, EPA-420-R-08-014, published September 2008)
• Summary and Analysis of Comments (PDF)(480 pp, 2.27 MB, EPA-420-R-08-016, published September 2008)

Rule History

• Proposed Rule and Related Materials

Additional Resources

Fact Sheet

• New Phase 3 Engine Standards Affecting Retailers and Importers of Lawn and Garden Equipment (PDF)(4 pp, 373K, EPA-420-F-09-031, August 2009)
• EPA Finalizes Emission Standards for New Nonroad Spark-Ignition Engines, Equipment, and Vessels (PDF)(5 pp, 190 K, EPA-420-F-08-013, September 2008)