Nonroad Engines, Equipment, and Vehicles
Forklifts, Generators, and Compressors (gasoline/propane)
Operator Information
- Emission Standards and Owner Responsibilities (PDF) (4 pp, 158K, EPA-420-F-12-053, August 2012)
- How to Maintain or Rebuild Engines Certified to EPA Standards (PDF) (4 pp, 142K, EPA-420-F-12-052, August 2012)
- Used Oil Management
Related Links
- Emission Standards Reference Guide
- Verify
- Certification Tools
- Engine Certification Information Center
- Stationary Spark-ignition Engines
- Lawn and Garden (Small Gasoline) Equipment
- Snowmobiles, Dirt Bikes, and ATVs
- Gasoline Boats and Personal Watercraft
- Diesel Equipment (farm, construction, ...)
- Certification Fees
- Importing Vehicles and Engines
NOTE: You will need Adobe Acrobat Reader, available as a free download, to view some of the files on this page. See EPA's PDF page to learn more about PDF, and for a link to the free Acrobat Reader.
This page provides regulations and guidance documents for nonroad spark-ignition (SI) engines over 19 kW (25 horsepower), including many kinds of equipment, such as forklifts, generators, and many other farm, industrial and construction applications. These engines may operate on propane, gasoline, or natural gas. Information on marine propulsion engines is available on the Gasoline Boats and Personal Watercraft page. Information on spark-ignition engines for recreational vehicles is on the Snowmobiles, Dirt Bikes and ATVs page. Information on smaller nonroad spark-ignition engines is on the Lawn and Garden (small gasoline equipment) page.
Regulations and Related Documents
See the Electronic Code of Federal Regulations (e-CFR) for the full text of current regulations that apply to Large SI engines:
| 40 CFR part 1048 | Emission standards and certification requirements |
| 40 CFR part 1060 | Evaporative emission standards and test procedures |
| 40 CFR part 1065 | Exhaust emission test procedures (for lab and in-field testing) |
| 40 CFR part 1068 | General Compliance Provisions |
- Summary of emission standards
- Large SI transient duty cycles (XLS) (2 pp, 144K, updated 2010)
- 2015 Amendments (published February 19, 2015)
- Direct Final Rulemaking (PDF) (48 pp, 1.04MB)
- See “2015 Amendments” for more information.
- 2013 Amendments (published June 17, 2013)
- Fact sheet: EPA Issues Amendments to the Heavy-Duty Highway Greenhouse Gas Rule and Other Nonroad Provisions (PDF) (3 pp, 534K, EPA-420-F-13-001, May 2013)
- Direct Final Rule (PDF) (38 pp, 652K)
- 2010 Amendments (published April 30, 2010)
- Final Rule (PDF) (171 pp, 3.66MB)
- See Marine Diesel final rule for more information. See especially Chapter 11 of the Summary and Analysis of Comments.
- Greenhouse Gas Reporting Rule (published October 30, 2009)
- Final Rule (PDF) (260 pp, 1.40MB)
- See Greenhouse Gas Reporting for more information.
- 2008 Amendments (published October 8, 2008)
- Final Rule (PDF) (347 pp, 3.69MB)
- See Bond final rule for more information
- Emission Standards for Stationary Spark-ignition Engines (published January 18, 2008)
- Final Rule (PDF) (47 pp, 371K)
- See Stationary SI Engines for more information
- Procedures for Testing Highway and Nonroad Engines and Omnibus Technical Amendments (published July 13, 2005)
- Fact Sheet: Regulatory Announcement: Changed Test Procedures for Nonroad Engines and Heavy-Duty Highway Engines (PDF) (4 pp, 134K, EPA420-F-05-036, July 2005)
- Final Rule (PDF) (193 pp, 7.38MB)
- Technical Support Document and Summary & Analysis of Comments
- See Proposed Technical Amendments for the proposed rule, fact sheet, and technical support documents (published September 10, 2004)
- Final Emission Standards (published November 8, 2002)
- Fact sheet: Emission Standards for New Nonroad Engines— Large Industrial Spark-ignition Engines, Recreational Marine Diesel Engines, and Recreational Vehicles (PDF) (7 pp, 409K, EPA420-F-02-037, September 2002)
- Final Rule (PDF) (207 pp, 1.1MB)
- Regulatory Support Document (PDF) (687 pp, 2.5MB, EPA420-R-02-022, September 2002)
- Summary and Analysis of Comments (PDF) (319 pp, 1MB, EPA420-R-02-023, September 2002)
- Environmental Impacts of Newly Regulated Nonroad Engines (PDF) (5 pp, 24K, EPA420-F-02-033, September 2002)
- Emission Regulations for Stationary and Mobile Engines (PDF) (6 pp, 479K, EPA420-F-02-034, September 2002); note that EPA has adopted emission standards for stationary engines since this fact sheet was published, as described above.
- Frequently Asked Questions from Facility Managers and other Owners of Industrial Spark-ignition Engines (PDF) (4 pp, 400K, EPA420-F-02-041, September 2002)
- Blue Sky Series Engines (PDF) (3 pp, 396K, EPA420-F-02-036, September 2002)
- Docket index (PDF) (141 pp, 689K, September 13, 2002)
- "Evaluation of Emissions Durability of Nonroad LPG Engines Equipped with Three-Way Catalysts" Final Report from Southwest Research Institute. Paper copies of this document are available from the National Technical Information Service (NTIS) under Product Code #PB2002101191.
- See Proposed Emission Standards for the proposed rule, supporting documents, advance notice and findings.