Marine Spark-Ignition Engines and Vehicles: Exhaust Emission Standards


vvEPA
United States
Environmental Protection
Agency
Office of Transportation and Air Quality
             EPA-420-B-16-026
                 March 2016
                                 Marine Spark-Ignition Engines and Vehicles: Exhaust Emission Standards

Federal e
Engine Type


Personal Watercraft &
Outboard Marine
Engines

Stern drive /
Inboard
Engines

Conventional
Engines g
High-
Performance
Engines
Model
Year
1998
1999
2000
2001
2002
2003
2004
2005
2006-
2009
2010 + s
2010 +

2010
2011 +
HC + NOx a
(g/KW-hr)
P < 4.3 kW b
278
[AST]
253
[AST]
228
[AST]
204
[AST]
179
[AST]
155
[AST]
130
[AST]
105
[AST]
81
[AST]
30.0
[AST]
P > 4.3 kW b
(0.917 x (151 + 557/P °-9 + 2.44)
[AST]
(0.833 x (151 + 557/P °-9 + 2.89)
[AST]
(0.750 x (151 + 557/P °-9) + 3.33
[AST]
(0.667 x (151 + 557/P °-9) + 3.78
[AST]
(0.583 x (151 + 557/P °-9) + 4.22
[AST]
(0.500 x (151 + 557/P °-9) + 4.67
[AST]
(0.417 x (151 +557/P°-9) + 5.11
[AST]
(0.333 x (151 + 557/P °-9) + 5.56
[AST]
(0.250 x (151 + 557/P °-9) + 6.00
[AST]
2.1 + 0.09 x (151 + 557/P °-9)
[AST]
5.0
[AST]
P 485 kW b
25.0
22.0
coc
(g/KW-hr)
P < 4.3 kW b
-
-
-
-
-
-
-
-
-
500- 5.0 xP
P > 4.3 kW b
-
-
-
-
-
-
-
-
-
300
75.0
[AST]
350
Useful Life
(hours/years) d
350/5
Personal Watercraft:
350 / 5 h
Outboard: 350 / 10 h
480/101
P<485kW: 150/3
P > 485 kW: 50 / 1
Warranty Period
(hours/years) d
All Emission-Related
Components: 1 year'
All Emission-Related
Components: 1 year
Specified Major Emission
Control Components:
200/3
All Emission-Related
Components: 200/2
Specified Major Emission
Control Components:
200/3
Personal Watercraft:
175 hours or 30 months
Outboard Engines:
175/5
Electrical & Mechanical
Components:
480/3
Electrical Components:
480/3
Mechanical Components:
P<485kW: 150/3
P > 485 kW: 50 / 1
Notes on following page.

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Notes:
    The numerical emission standards for hydrocarbons (HC) must be met based on
    the following types of HC emissions for engines powered by the following fuels: (1)
    total hydrocarbon equivalent for alcohol; (2) non-
    methane hydrocarbon for natural gas; and (3) total hydrocarbons for other fuels.
    P stands for the maximum engine power in kilowatts.
    Manufacturers may generate or use emission credits for averaging, but not for
    banking or trading.
    Useful life and warranty period are expressed hours or years of operation (unless
    otherwise indicated), whichever comes first.
    The test procedure for federal standards uses the International Organization for
    Standardization (ISO)  8178  E4 5-Mode Steady-State Test Cycle.
    Also applies to model year (MY) 1997 engine families certified pursuant to 40 Code
    of Federal Regulations (CFR) 91.205.
    Not-to-exceed emission standards specified in 40 CFR 1045.107 also
    apply.
    A longer useful life in terms of hours must be specified for the engine family if the
    average service life is  longer than the minimum value as described in 40 CFR
    1045.103(e)(3).
    The useful life may not be shorter than: (1) 150 hours of operation; (2) the recom-
    mended overhaul interval; or (3) the engine>s mechanical
    warranty. A longer useful life must be specified in terms of hours if the average ser-
    vice life is longer than  the minimum value as described in 40 CFR 1045.105(e)(3).
Code of Federal Regulations (CFR) Citations:
    40 CFR 91.104 = Outboard and personal watercraft (PWC) exhaust emission
    standards (1998-2009)
•    40 CFR 91.105 = Outboard and PWC useful life (1998-2009)
•    40 CFR 91.1203 = Warranty period (1998-2009)
    40 CFR 1045.103 = Outboard and  PWC exhaust emission standards (2010+)
    40 CFR 1045.105 = Sterndrive/lnboard exhaust emission standards
    40 CFR 1045.107 = Not-to-exceed exhaust emission standards
    40 CFR 1045.120 = Warranty requirements (2010+)

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