Large Spark-Ignition Engine - Regulatory and Certification Documents
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This page provides a list of the Manufacturers Advisory Correspondence (MACs), mailouts, correspondence, regulations, test procedures, and guidelines applicable to Off-Road Large Spark-Ignition Engines 25 Horsepower and greater, and is primarily for the interest and needs of manufacturers and others that are required to obtain certification from CARB. For more public-oriented materials, visit Off-Road Large Spark-Ignition Engines.
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.
Regulations and Test Procedures
Regulations
Off-Road Large Spark-Ignition Engines (2001-2006)
- Sections 2430-2439, Title 13, California Code of Regulations (adopted September 1, 1999)
Off-Road Large Spark-Ignition Engines (2007 and later)
- Amended Sections 2430-2431, 2433-2434,and 2438, Title 13, California Code of Regulations (amended March 2, 2007)
- Amended Section 2433, Title 13, California Code of Regulations (amended November 21, 2008)
- Amended Section 2433, Title 13, California Code of Regulations (amended October 25, 2012)
View the informal documents pertaining to this rulemaking.
Spark-Ignition Small Off-Road Engines
Test Procedures
Off-Road Large Spark-Ignition Engines
- California Exhaust Emission Standards and Test Procedures for New 2001 through 2006 Off-Road Large Spark-Ignition Engines (amended March 2, 2007)
- California Exhaust and Evaporative Emission Standards and Test Procedures for New 2007 through 2009 Off-Road Large Spark-Ignition Engines (2007 - 2009 Test Procedure 1048) (adopted March 2, 2007)
- California Exhaust and Evaporative Emission Standards and Test Procedures for New 2010 and Later Off-Road Large Spark-ignition Engines (2010 and Later Test Procedure 1048) (adopted March 2, 2007)
- Amended California Exhaust and Evaporative Emission Standards and Test Procedures for New 2010 and Later Off-Road Large Spark-ignition Engines (2010 and Later Test Procedure 1048) (amended November 21, 2008)
- Amended California Exhaust and Evaporative Emission Standards and Test Procedures for New 2010 and Later Off-Road Large Spark-ignition Engines (2010 and Later Test Procedure 1048) (amended October 25, 2012)
- California Exhaust and Evaporative Emission Standards and Test Procedures for New 2007 and Later Off-Road Large Spark-Ignition Engines (Test Procedures 1065 and 1068) (adopted March 2, 2007)
- Amended California Exhaust and Evaporative Emission Standards and Test Procedures for New 2007 and Later Off-Road Large Spark-Ignition Engines (Test Procedures 1065 and 1068) (amended 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)
Spark-Ignition Small Off-Road Engines
- California Exhaust Emission Standards and Test Procedures for 1995 and Later Small Off-Road Engines (last amended March 23, 1999)
Manufacturers Advisory Correspondence
MAC Number | Subject |
|---|---|
| MAC 05-02 | |
| MAC 01-01 | Optional Use of the Federal Engine Test Cycle Speed and Load Specifications for Exhaust Emission Testing of Spark-Ignition Small Off-Road Engines (added June 6, 2001) |
Mobile Source Mailouts
Mailout Number | Subject |
|---|---|
ML 15-01 | Small Off-Road Engine Evaporative Certification Changes and Fuel Hose Requirements (Only Applicable to LSI Engines/Equipment less than or equal to 1 Liter) |
ECARS 15-07 | Streamlined Certification Process For Carryover And Partial Carryover Certification Applications |
MSO 07-03 | |
MSO 01-03 | |
MSO 00-13 | Certification Guideline For 2001 Model-Year (MY) And Later LSI Engines
For Model Year 2008 And Later |
MSO 96-30 |
Correspondence
Reference No. C-2001-503 | Dunway & Cross July 31, 2001 Letter to CARB on CARB LSI Regulation-assigning engines to model years |
Guidelines
Large Spark-Ignited Engine/Equipment (Less Than or Equal To 1 Liter) Evaporative Certification
LSIE ≤1 Liter regulations incorporate by reference the Small Off-Road Engine and Equipment certification and approval procedures. As a result, the evaporative certification procedures for 2011 and Later LSIE ≤1 Liter are the same as those for Small Off-Road Engines and Equipment (except Small Production Volume Tank Exemption). The following are the relevant SORE documents:
- Guidelines for Evaporative Certification of 2006 and Later Small Off-Road Engine/Equipment
- TP-901 ~ Test Procedure for Determining Permeation Emissions from Small Off-Road Engine Equipment Fuel Tanks
- TP-902 ~ Test Procedure for Determining Diurnal Evaporative Emissions from Small Off-Road Engines
- CP-901 ~ Certification And Approval Procedures for Small Off-Road Engine Fuel Tanks
- CP-902 ~ Certification And Approval Procedures for Evaporative Emission Control Systems
For Model Year 2020 and Later
- Evaporative Certification Form (updated May 30, 2019)
- LSIE Evaporative ≤ 1L Model Summary Excel Template (updated November 12, 2020)
- Bond Worksheet for LSIE ≤1L Evaporative Certification
- Evaporative Certification Averaging and Banking Credit Worksheet Form
- SORE/LSIE ≤1 Liter Evaporative Certification FAQ's
- Refer to #4-11: How do the amendments to the SORE evaporative emission regulations affect LSI engines?
Refer to Small Off-Road Engine Mobile Source Mailout ECARS 19-04 for guidance regarding the submittal of certification applications and bond worksheets for Small and Large (≤1L) Spark-Ignited Evaporative Families for 2020 and Later Model Years (link)
For Model Year 2019 and Earlier
- Evaporative Certification Form (updated December 30, 2015)
- Evaporative Certification Averaging and Banking Credit Worksheet Form
Engine Sampling Plan Requirements (updated November 15, 2002)
Certification Database
The following link provides the certification database and the Executive Orders for Off-Road Large Spark-Ignition Engines: Off-Road Certification Database
Document Management System (DMS)
The following link is for information and guidelines regarding the electronic Document Management System used to submit certification applications and supporting documents: More Information
For more information on Off-Road Large Spark-Ignition Engine certification procedures, contact:
- Byron Ng at (951) 542-3301
- Sophia Mahmood at (951) 542-3277 (LSIE ≤1 Liter evaporative only)