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Table 4-36. Federal Exhaust Emissions Standards for Newly Manufactured Marine Spark-Ignition Outboard, Personal Watercrafte, and Jet-Boat Enginesa
(g/kWh)
Excel |
CSV
| 278.00 |
(0.917 x (151 + 557/P0.9)) + 2.44 |
1 yr for all emissions-related components |
Outboard engines:
350 hr/10 yr
Personal watercraft
350 hr/5 yr |
| 253.00 |
(0.833 x (151 + 557/P0.9)) + 2.89 |
1 yr for all emissions-related components |
Outboard engines:
350 hr/10 yr
Personal watercraft
350 hr/5 yr |
| 228.00 |
(0.750 x (151 + 557/P0.9)) + 3.33 |
1 yr for all emissions-related components |
Outboard engines:
350 hr/10 yr
Personal watercraft
350 hr/5 yr |
| 204.00 |
(0.667 x (151 + 557/P0.9)) + 3.78 |
1 yr for all emission-related components;
3 yr/200 hr for specified majoremissions control components |
Outboard engines:
350 hr/10 yr
Personal watercraft
350 hr/5 yr |
| 179.00 |
(0.583 x (151 + 557/P0.9)) + 4.22 |
1 yr for all emission-related components;
3 yr/200 hr for specified majoremissions control components |
Outboard engines:
350 hr/10 yr
Personal watercraft
350 hr/5 yr |
| 155.00 |
(0.500 x (151 + 557/P0.9)) + 4.67 |
1 yr for all emission-related components;
3 yr/200 hr for specified majoremissions control components |
Outboard engines:
350 hr/10 yr
Personal watercraft
350 hr/5 yr |
| 130.00 |
(0.417 x (151 + 557/P0.9)) + 5.11 |
2 yr/200 hr for all emissions-relatedcomponents;
3 yr/200 hr for specifiedmajor emissions control components |
Outboard engines:
350 hr/10 yr
Personal watercraft
350 hr/5 yr |
| 105.00 |
(0.333 x (151 + 557/P0.9)) + 5.56 |
2 yr/200 hr for all emissions-relatedcomponents;
3 yr/200 hr for specifiedmajor emissions control components |
Outboard engines:
350 hr/10 yr
Personal watercraft
350 hr/5 yr |
| 81.00 |
(0.250 x (151 + 557/P0.9)) + 6.00 |
2 yr/200 hr for all emissions-relatedcomponents;
3 yr/200 hr for specifiedmajor emissions control components |
Outboard engines:
350 hr/10 yr
Personal watercraft
350 hr/5 yr |
a The standards apply to marine spark-ignition outboard, personal watercraft, and jet-boat engines only. There are currently no federal standards for marine spark-ignition sterndrive/inboard engines (previously proposed standards have not been finalized).Marine compression-ignition engines under 50 hp are covered under the proposed nonroad compression-ignition engine standards.Federal standards are in development for marine compression-ignition engines over 50 hp.
b P = the average power of the engine family in kilowatts (sales-weighted).
c As an example, the standards for an outboard engine of 125 hp (just over 93 kW) would be 149.53 g/kWh in 1998, 123.63 g/kWh in 2000, 97.74 g/kWh in 2002, 72.00 g/kWh in 2004, and 46.10 g/kWh in 2006.
d All emissions standards must be met for the useful life of the engine.
e The standards for personal watercraft did not go into effect until 1999, although the standard went into effect for outboardengines in 1998.
KEY: g = gram; hr = hour; HC = hydrocarbon; hp = horsepower; kW = kilowatt; kWh = kilowatt hour; NOx = nitrogen oxide; yr = year.
SOURCES: 40 CFR 91 July 1, 1998 edition, pp. 242-243.Society of Automotive Engineers, Small Craft
—Marine Propulsion Engine and Systems
—Power Measurements, Document J1228, November 1991.
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