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Code of Federal Regulations (Last Updated: November 8, 2024) |
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Title 40 - Protection of Environment |
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Chapter I - Environmental Protection Agency |
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SubChapter C - Air Programs |
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Part 91 - Control of Emissions from Marine Spark-Ignition Engines |
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Subpart D - Emission Test Equipment Provisions |
| § 91.301 - Scope; applicability. |
| § 91.302 - Definitions. |
| § 91.303 - Acronyms and abbreviations. |
| § 91.304 - Test equipment overview. |
| § 91.305 - Dynamometer specifications and calibration accuracy. |
| § 91.306 - Dynamometer torque cell calibration. |
| § 91.307 - Engine cooling system. |
| § 91.308 - Lubricating oil and test fuel. |
| § 91.309 - Engine intake air temperature measurement. |
| § 91.310 - Engine intake air humidity measurement. |
| § 91.311 - Test conditions. |
| § 91.312 - Analytical gases. |
| § 91.313 - Analyzers required. |
| § 91.314 - Analyzer accuracy and specifications. |
| § 91.315 - Analyzer initial calibration. |
| § 91.316 - Hydrocarbon analyzer calibration. |
| § 91.317 - Carbon monoxide analyzer calibration. |
| § 91.318 - Oxides of nitrogen analyzer calibration. |
| § 91.319 - NOX converter check. |
| § 91.320 - Carbon dioxide analyzer calibration. |
| § 91.321 - NDIR analyzer calibration. |
| § 91.322 - Calibration of other equipment. |
| § 91.323 - Analyzer bench checks. |
| § 91.324 - Analyzer leakage check. |
| § 91.325 - Analyzer interference checks. |
| § 91.326 - Pre- and post-test analyzer calibration. |
| § 91.327 - Sampling system requirements. |
| § 91.328 - Measurement equipment accuracy/calibration frequency table. |
| § 91.329 - Catalyst thermal stress test. |
| Appendix A to Subpart D of Part 91 - Tables |
| Appendix B to Subpart D of Part 91 - Figures |