APPENDIX A: MANUFACTURER STANDARDS AND TEST PROCEDURES 

Part 3 

Proposed Regulation Order Part 3: Amendments to the incorporated “California Exhaust 

and Standards and Test Procedures for New 2001 and Later Off-Road Large SparkIgnition Engines” (ISO 8178) 

State of California 

AIR RESOURCES BOARD 

CALIFORNIA EXHAUST EMISSION STANDARDS AND TEST PROCEDURES 

FOR NEW 2001 AND LATER THROUGH 2006 OFF-ROAD LARGE SPARK-IGNITION 

ENGINES 

PART II 

Adopted: September 1, 1999

NOTE: This document incorporates by reference the International Standards Organization 

(ISO) 8178 test procedure, Part 1, August 15, 1996, Part 4, August 15, 1996, and 

Part 5, May 15, 1998, with modifications. Sections which have been included in 

their entirety are set forth with the section number and title. California provisions 

which modify specific ISO provisions are denoted by the words "DELETE" for 

the ISO language and "REPLACE WITH" for the new California language. The 

symbols "*****" and "..." mean that the remainder of the ISO text for a specific 

section is not shown in these procedures but has been included by reference, 

unchanged. ISO sections which are not listed are not part of the procedures. 

This document is all newly adopted text.

The sole amendments are to the title and years of applicability of the regulations.
CALIFORNIA EXHAUST EMISSION STANDARDS AND TEST PROCEDURES 

FOR NEW 2001 AND LATER THROUGH 2006 OFF-ROAD LARGE SPARK-IGNITION 

ENGINES 

PART II 

To the extent the following provisions of ISO 8178, Part 1, August 15, 1996, Part 4, August 15, 

1996, and Part 5, May 15, 1998, pertain to the testing and compliance of exhaust emissions from 

off-road large spark-ignition engines, they are adopted and incorporated herein by this reference 

as Part II of the California Exhaust Emission Standards and Test Procedures for New 2001 and 

Later through 2006 Off-Road Large Spark-Ignition Engines (Test Procedures), except as altered 

or replaced by the provisions set forth below. 

Since the scope of this regulation is limited to off-road spark-ignition engines, the ISO 

provisions contained in the procedure identified above which pertain to Diesel cycle engines or 

to engines used for applications other than off-road purposes shall not be applicable to Part II of 

these Test Procedures. 

International Standards Organization (ISO) 8178, RIC Engines - Exhaust emission measurement 

- Part 1: Test bed measurement of gaseous and particulate exhaust emissions from RIC engines. 

1. Scope 

2. Normative References 

3. Definitions 

ADD: 

Note: In addition to the definitions listed here, those definitions listed in section 

2 of Part I of these Test Procedures apply. 

* * * * * 

4. Symbols and Abbreviations 

ADD: 

Note: In addition to the symbols and abbreviations listed here, those symbols 

and abbreviations listed in section 3 of Part I of these Test Procedures 

shall apply. 

* * * * * 

5. Test Conditions 
2 

6. DELETE and 

 REPLACE WITH: 

6. Test fuels 

Test fuels shall meet the requirements specified in section 25 of Part I of these 

Test Procedures. 

7. Measurement Equipment and data to be measured 

DELETE all references to subsection 7.5 (Determination of the Particulates). 

8. Calibration of the analytical instruments 

9. DELETE 

10. Running conditions (Test cycles) 

11. Test run 

DELETE all references to the particulates and particulate sampling method. 

12. Data evaluation for gaseous and particulate emission 

DELETE all references to the particulate emission. 

13. Calculation of gaseous emissions 

14. DELETE 

15. Determination of the gaseous emissions 

ADD: 

NOTE: Manufacturers may use the raw exhaust gas sampling methods for 

certification testing through 2004 model year with prior Executive 

Officer approval. 

* * * * 

16. DELETE 

Figures and Explanations 
3 

Annex A Calculation of the exhaust gas mass flow and/or of the combustion air 

consumption 

Annex B Equipment and auxiliaries to be installed for the test to determine engine power 

Annex C Efficiency calculation and corrections for the non-methane hydrocarbon cutter 

measuring method 

Annex D Formulae for the calculation of the coefficients u, v, w in 13.4 

Annex E Heat calculation (transfer tube) 

Annex F Bibliography 
4 

ISO 8178, RIC Engines - Exhaust emission measurement - Part 4: Test cycles for different 

engine applications. 

1. Scope 

2. Normative References 

3. Definitions 

ADD: 

Note: In addition to the definitions listed here, those definitions listed in section 

2 of Part I of these Test Procedures shall apply. 

* * * * * 

4. Symbols and Abbreviations 

ADD: 

Note: In addition to the symbols and abbreviations listed here, those symbols 

and abbreviations listed in section 3 of Part I of these Test Procedures 

shall apply. 

* * * * * 

5. Torque 

6. Intermediate speed 

7. Information regarding of the test 

8. Modes and weighting factors for test cycles 

8.2 DELETE 

8.3 Test cycle types C "Off-road vehicles and industrial equipment" 

8.3.1 DELETE 
5 

8.4 Test cycle type D “Constant” 

DELETE all references to D-1 test cycle 

8.5 DELETE 

8.6 DELETE 

8.7 Test cycles type G “Utility, lawn and garden”, typically < 25 hp. 

DELETE all reference to G-2 and G-3 test cycles. 

ADD: 

Note: Manufacturers may use the G-1 test cycle for engines equal to or less than 

1.0 liter. Manufacturer must show that the engines tested with the G-1 test 

cycle have engine characteristics and operating characteristics similar to 

small off-road equipment engines (less than 25 hp).

* * * * 

Annex A DELETE 

Annex B Combined table of the weighting factors 

Annex C Bibliography 
6 

ISO 8178, RIC Engines - Exhaust emission measurement - Part 5: Test fuels. 

1. DELETE and 

REPLACE WITH: 

1. Scope 

This part specifies the calculation of the fuel specific factors and exhaust gas flow, which 

are necessary to determine the emission test results in accordance with ISO 8178, Part 1. 

2. Normative References 

3. Definitions 

ADD: 

Note: In addition to the definitions listed here, those definitions listed in section 

2 of Part I of these Test Procedures apply. 

* * * * * 

4. Symbols and Abbreviations 

ADD: 

Note: In addition to the symbols and abbreviations listed here, those symbols 

and abbreviations listed in section 3 of Part I of these Test Procedures 

apply. 

* * * * * 

5. DELETE and REPLACE WITH: 

5. Choice of Fuels 

Test fuels shall meet the requirements specified in section 25 of Part I of these Test 

Procedures. 

6. DELETE 

7. Calculation of the Exhaust Gas Flow Using Fuel Specific Factors 

8. Calculation of the Fuel Specific Factors 

Tables 
Annex A Calculation of the fuel specific factors 

Annex B Equivalent non-ISO test methods 

Annex C Organizations capable of providing specifications for commercial fuels 

Annex D Bibliography