United States Air and Radiation EPA420-F-00-006
Environmental Protection February 2000
Agency
Office of Transportation and Air Quality
vvEPA Technical
Highlights
Emission Standards for Marine Diesel
Engines: Scope of Application
The U.S. Environmental Protection Agency's (EPA) final rule for
commercial marine diesel engines sets emission standards that apply
to new engines used in the United States. These standards take effect
for new engines manufactured starting in 2004, 2005, or 2007,
depending their size (see Table 1). This fact sheet addresses
companies that produce these engines.
How does EPA distinguish marine and non-marine
diesel engines?
We define a marine diesel engine as one that is "installed on" a marine
vessel. A loose engine that someone intends to install on a marine vessel
is also a marine diesel engine if its fueling, cooling, and exhaust systems
are integral to the vessel.
Do the emission standards apply to remanufactured
engines?
Generally no. Our requirements don't affect marine engines you produce
and sell before the new standards take effect, with three exceptions:
1. if you remanufacture a land-based engine for installation on a
marine vessel, or
2. if you remanufacture any engine for installation in a new vessel, or
3. if anyone imports an uncertified engine installed (or to be installed)
on a vessel.
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In the first two cases, we treat the engine as a new marine engine that
must meet standards when you remanufacture it. Also, if you try to
install a used engine in a new vessel (or a land-based engine in any
vessel) without remanufacturing it, the emission standards in effect at the
time of installation would apply to that engine. For an imported engine,
we apply the marine engine standards, if any, in effect when it was
freshly manufactured.
is a "new
A new vessel is one that is freshly manufactured or on whose value at the
point of sale is at least 50 percent from new parts and construction. This
includes vessels that recycle selected components and refurbished ves-
sels that are so extensively overhauled that the majority of the resale
value is from the new construction.
Anyone rebuilding or remanufacturing a certified engine must bring it
back to its original configuration. See the fact sheet on rebuilding diesel
engines for more information (EPA420-F-99-045). We do not expect
anyone to certify or re-certify these remanufactured engines.
if my to a
a
If you make a new marine engine to replace another one, it must meet
any emission standards in effect when you finish assembling it. However,
if we agree no engine is available (from you or any other manufacturer)
with the physical and performance characteristics needed for that instal-
lation, we will allow you to produce an uncertified engine. You must
label the new engine and collect the one you're replacing.
is the
If someone wants to install a new marine diesel engine on a U.S.-flagged
vessel for overseas operation, you may ask us to exempt it. You must get
a letter from the buyer of the new vessel showing it will operate mainly
overseas. The buyer can do this in one of two ways:
(1) Show that at least 75 percent of the engine's operation will
occur more than 320 nautical kilometers outside the U.S., not
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including trips between U.S. ports in Alaska, Hawaii, the continen-
tal U.S., or its territories.
(2) Show the vessel has (or will have) solely a registry endorsement
so it's clear the vessel won't operate between two U.S. ports.
if I a is
to for in a
You may qualify for the engine dressing exemption. For more informa-
tion, see 40 CFR 94.907. See the earlier question about remanufacturing
land-based engines for marine vessels.
A recreational marine diesel engine is one you intend to be installed on a
recreational vessel. The emission standards in this final rule don't apply
to these engines, but you must label them to show they're for recre-
ational vessels. We will propose separate emission standards for recre-
ational engines.
are
The final rule for commercial marine diesel engines includes several
other exemptions, many of which are common to other programs. See 40
CFR 94, Subparts I and J for more information about how we handle
each of these exemptions.
1. Competition exemption: for engines used solely for competition.
2. National security exemption: for combat-related applications.
3. Testing exemption: for your specific testing programs with
uncertified engines.
4. Manufacturer-owned engine exemption: for engines you keep to
further develop your product.
5. Display exemption: for engines that are strictly for observation.
6. Export exemption: for engines you export to other countries (as
long as they don't adopt our standards).
7. Incomplete engine exemption: for loose, uncertified engines you
import to convert into a certified marine configuration.
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do I get
You can get electronic documents on emission standards for marine
diesel engines on the Office of Transportation and Air Quality web site
at:
http://www.epa.gov/otaq/marine.htm
You can also contact Alan Stout at:
U.S. Environmental Protection Agency
Office Transportation and Air Quality
2000 Traverwood Drive
Ann Arbor, MI 48105
(734)214-4805
e-mail: stout.alan@epa.gov
Table 1
U.S. EPA Emission Standards and Dates for Marine Diesel Engines
Category
1
2
Displacement
(liters/cylinder)
power > 37 kW
disp. <0.9
0.9 3300
kW
20 < disp. <25
25 < disp. <30
Starting
Date
2005
2004
2004
2007
2007
2007
2007
2007
2007
NOx+HC
(g/kW-hr)
7.5
7.2
7.2
7.2
7.8
8.7
9.8
9.8
11.0
PM
(g/kW-hr)
0.40
0.30
0.20
0.20
0.27
0.50
0.50
0.50
0.50
CO
(g/kW-hr)
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
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