Small Off-Road Engine or Equipment Regulatory and Certification Documents
Contacto
This page provides a list of the Manufacturers Advisory Correspondence (MACs), mailouts, correspondence, regulation, test procedures, and guidelines applicable to Small Off-Road Engines or Equipment less than or equal to 19 kilowatts (25 horsepower), and is primarily for the interest and needs of manufacturers and others that are required to obtain certification from CARB. In addition, the engine certification database and Executive Orders can be accessed below. This page also contains a link to the component Executive Order list, which may be used for evaporative certification.
Subscribe to the Mobile Source Mailouts and MAC topic to be notified when a new Mobile Source Mailout or MAC has been posted.
Updates
On April 30, 2019, CARB conducted a public workshop to discuss the proposed adoption of a schedule of fees for mobile source certification and compliance.
- Mobile Source Certification and Compliance Fee Regulation Meetings & Workshops
- Workshop Presentation
Regulations and Test Procedures
Regulations
Exhaust Emission Regulations
- Amendments to the Small Off-Road Engine Exhaust Emission Regulations, California Code of Regulations, Title 13, Division 3, Chapter 9. Off-Road Vehicles and Engines Pollution Control Devices, Article 1. Small Off-Road Engines (amended January 1, 2023)
- Amendments to the Exhaust Emission Regulations - Sections 2403, 2404, and 2407 (adopted October 25, 2012)
- Amendments to the Exhaust Emission Regulations - Sections 2401, 2403-2406, 2408, 2409 and Adopted Section 2408.1 (adopted February 24, 2010, and corrected March 29, 2010)
- Exhaust Emission Regulation Order (adopted July 26, 2004)
Evaporative Emission Regulations
- Amendments to the Small Off-Road Engine Evaporative Emission Regulations, California Code of Regulations, Title 13, Division 3, Chapter 15. Additional Off-Road Vehicles and Engines Pollution Control Requirements, Article 1. Evaporative Emission Requirements for Off-Road Equipment (amended January 1, 2023)
- Amended Evaporative Emission Regulation Order- Sections 2750 - 2774 (amended May 6, 2019)
- Amended Evaporative Emission Regulation Order (amended September 18, 2017)
- Final Evaporative Emission Regulation Order (adopted July 26, 2004)
Test Procedures
Exhaust Emission Test Procedures
Model Year 2013 and Later
- Amendments to the California Exhaust Emission Standards and Test Procedures for New 2013 and Later Small Off-Road Engines; Engine-Testing Procedures (Part 1054) (amended January 1, 2023)
- California Exhaust Emission Standards and Test Procedures for New 2013 and Later Small Off-Road Engines (Part 1054) (adopted October 25, 2012)
- Amendments to the California Exhaust Emission Standards and Test Procedures for New 2013 and Later Small Off-Road Engines; Engine-Testing Procedures (Part 1065) (amended January 1, 2023)
- California Exhaust Emission Standards and Test Procedures for New 2013 and Later Small Off-Road Engines (Part 1065) (adopted October 25, 2012)
Model Year 2005 - 2012
- California Exhaust Emission Standards and Test Procedures for 2005-2012 Small Off-Road Engines (adopted July 26, 2004)
- Amendments to the California Exhaust Emission Standards and Test Procedures for 2005-2012 Small Off-Road Engines (amended February 24, 2010)
- Amendments to the California Exhaust Emission Standards and Test Procedures for 2005-2012 Small Off-Road Engines (amended October 25, 2012)
Model Year 1995 - 2004
- California Exhaust Emission Standards and Test Procedures for 1995-2004 Small Off-Road Engines
- Amendments to the California Exhaust Emission Standards and Test Procedures for 1995-2004 Small Off-Road Engines
Evaporative Emission Test Procedures
- Amendments to the Small Off-Road Engine Evaporative Emissions Test Procedure, TP-901, Test Procedure for Determining Permeation Emissions from Small Off-Road Engine Fuel Tanks (amended January 1, 2023)
- Amended TP-901 ~ Test Procedure for Determining Permeation Emissions from Small Off-Road Engine Equipment Fuel Tanks (amended May 6, 2019)
- Amended TP-901 ~ Test Procedure for Determining Permeation Emissions from Small Off-Road Engine Equipment Fuel Tanks (amended September 18, 2017)
- TP-901 ~ Test Procedure for Determining Permeation Emissions from Small Off-Road Engine Equipment Fuel Tanks
- Amendments to Small Off-Road Engine Evaporative Emissions Test Procedure, TP-902, Test Procedure for Determining Evaporative Emissions from Small Off-Road Engines (amended January 1, 2023)
- Amended TP-902 ~ Test Procedure for Determining Diurnal Evaporative Emissions from Small Off-Road Engines (amended May 6, 2019)
- Amended TP-902 ~ Test Procedure for Determining Diurnal Evaporative Emissions from Small Off-Road Engines (amended September 18, 2017)
- TP-902 ~ Test Procedure for Determining Diurnal Evaporative Emissions from Small Off-Road Engines
Alternative Evaporative Emission Test Procedures
For questions regarding approval of an alternative test procedure, contact Michele Dunlop at (916) 323-8971
SORE Fact Sheet & FAQ
Manufacturers Advisory Correspondence
Mobile Source Mailouts
Correspondence
Reference Number | Subject |
Reference No. NSC-2013-262 | |
Reference No. NSC-2004-025 | OPEI's July 1, 2004 Letter to the California Air Resources Board (CARB) on Certification of 2005 Model-Year Handheld Lawn and Garden Products |
Reference No. C-2000-343 | PPEMA March 8, 2000 Letter to CARB on Alternative Duty Cycles for SOREs Below 65 cc in Displacement |
Reference No. C-99-313 | EMA April 26, 1999 Letter to CARB on EMA Proposal for an Acceptable DF Test Procedure |
Guidelines
- Certification Application Forms
- SORE Exhaust Certification Application Form for 2024 and Later Model Years (December 5, 2023)
- SORE Evaporative Certification Application Form for 2024 and Later Model Years (December 5, 2023)
- Zero-Emission Equipment Family Certification Application Form for 2023 and Later Model Years (December 5, 2023)
- Zero-Emission Generator Family Certification Application Form for 2023 and Later Model Years (December 5, 2023)
- SORE Evaporative Model Summary Excel Template for 2024 and Later Model Years (February 8, 2024)
- SORE Exhaust Model Summary Excel Template (updated August 19, 2021)
- Supplemental SSIE Exhaust Application Required for 2013 and Later Small Off-Road Engines (December 16, 2011 SSIE Board Hearing Changes)
- Supplemental SSIE Exhaust Application Instructions (updated March 26, 2013)
- Supplemental SSIE Exhaust Application Form (updated March 26, 2013)
- Development of Deterioration Factors for Small Off-Road Engines
- Engine Sampling Plan Requirements (updated November 15, 2002)
- Procedures for Utilization of Auxiliary Engine Cooling
- Evaporative Emission Certification Procedures
- Amended CP - 901 ~ Certification And Approval Procedures for Small Off-Road Engine Fuel Tanks (amended September 18, 2017)
- CP - 901 ~ Certification And Approval Procedures for Small Off-Road Engine Fuel Tanks
- Amendments to Small Off-Road Engine Evaporative Emission Control System Certification Procedure, CP-902, Certification Procedure for Evaporative Emission Control Systems on Small Off-Road Engines (amended January 1, 2023)
- Amended CP - 902 ~ Certification And Approval Procedures for Evaporative Emission Control Systems (amended September 18, 2017)
- CP - 902 ~ Certification And Approval Procedures for Evaporative Emission Control Systems
- Guidelines for Evaporative Certification of 2006 and Later Small Off-Road Engine/Equipment (updated January 10, 2007)
- Model Year 2020 and Later
- Evaporative Certification Form for < 80 cc (updated May 30, 2019)
- SORE Evaporative < 80 cc Model Summary Excel Template (updated August 19, 2021)
- Evaporative Certification Form for > 80 cc (updated May 30, 2019)
- SORE Evaporative > 80 cc Model Summary Excel Template (updated August 19, 2021)
- Evaporative Certification Form for < 80 cc (updated May 30, 2019)
- Model Year 2019 and Earlier
- Evaporative Certification Form for < 80 cc
- Evaporative Certification Form for > 80 cc (updated November 10, 2015)
- Model Year 2020 and Later
Presentations
- Small Spark-Ignited Engine Evaporative Certification Workshop Presentation (October 4, 2019)
- SORE/HMC/OHRV Certification and Compliance Workshop Presentation (updated November 9, 2015)
Engine Certification Database
- View the Certification Database and the Executive Orders for Spark-Ignition Small Off-Road Engines.
Component Executive Orders
View the Component Executive Orders for evaporative certification of Spark-Ignition Small Off-Road Engines or Equipment.
Document Management System (DMS)
View the guidelines regarding the electronic Document Management System used to submit certification applications and supporting documents.
For more information on Small Spark-Ignition Off-Road Engine or Equipment certification procedures, contact:
Exhaust - Janie Han at (951) 542-3191
Evaporative - Sophia Mahmood at (951) 542-3277