[Code of Federal Regulations]
[Title 40, Volume 18]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR91.104]
[Page 301-302]
TITLE 40--PROTECTION OF ENVIRONMENT
CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
PART 91--CONTROL OF EMISSIONS FROM MARINE SPARK-IGNITION ENGINES--Table of
Contents
Subpart B--Emission Standards and Certification Provisions
Sec. 91.104 Exhaust emission standards for outboard and personal watercraft engines.
(a) New marine spark-ignition outboard and personal watercraft
engines for use in the U.S. must meet the following exhaust emission
standards for HC+NOX. The exhaust emission standard for each
model year is provided below. It is also used as input to the
calculation procedure in Sec. 91.207 to determine compliance with the
corporate average HC+NOX exhaust emission standard.
Hydrocarbon Plus Oxides of Nitrogen Exhaust Emission Standards
[grams per kilowatt-hour]
----------------------------------------------------------------------------------------------------------------
P 4.3 kW HC+NOX
Model year P < 4.3 kW HC+NOX emission emission standard by model
standard by model year year
----------------------------------------------------------------------------------------------------------------
1998.................................................. 278.00 (0.917 x (151 + 557/
P0.9[rpar]) + 2.44
1999.................................................. 253.00 (0.833 x (151 + 557/
P0.9[rpar]) + 2.89
2000.................................................. 228.00 (0.750 x (151 + 557/
P0.9[rpar]) + 3.33
2001.................................................. 204.00 (0.667 x (151 + 557/
P0.9[rpar]) + 3.78
2002.................................................. 179.00 (0.583 x (151 + 557/
P0.9[rpar]) + 4.22
2003.................................................. 155.00 (0.500 x (151 + 557/
P0.9[rpar]) + 4.67
2004.................................................. 130.00 (0.417 x (151 + 557/
P0.9[rpar]) + 5.11
2005.................................................. 105.00 (0.333 x (151 + 557/
P0.9[rpar]) + 5.56
2006 and later........................................ 81.00 (0.250 x (151 + 557/
P0.9[rpar]) + 6.00
----------------------------------------------------------------------------------------------------------------
where:
P = the average power of an engine family in kW (sales weighted). The
power of each configuration is the rated output in kilowatts as
determined by SAE J1228. This procedure has been incorporated by
reference. See Sec. 91.6.
[[Page 302]]
(b) Exhaust emissions are measured using the procedures set forth in
subpart E of this part.
(c) Manufacturers must designate a Family Emission Limit (FEL) for
HC+NOX for every engine family. The FEL may be equal to the
emission standard in paragraph (a) of this section. The FEL established
through certification serves as the emission standard for the engine
family and emissions may not exceed the FEL levels for HC+NOX
for all engines sold in the engine family, for their useful life.
(d) A manufacturer must comply with a corporate average
HC+NOX emission standard as determined in accordance with
subpart C Sec. 91.207.