United States Air and Radiation EPA420-F-99-046
Environmental Protection December 1999
Agency
Office of Mobile Sources
vvEPA Technical
Highlights
Organization of Gasoline and Diesel
Marine Engine Emission Standards
In several different rulemakings, the U.S. Environmental Protection
Agency (EPA) has adopted emission standards that apply to various
types of marine engines. This fact sheet shows how these requirements
relate to each other and identifies where to find the requirements that
apply to a specific engine.
As a producer of marine engines, when do I need to
certify my engines?
The following information shows when emission standards start for
different groups of marine engines. The dates listed apply to the time
that you finish assembling an engine.
Spark-ignition Outboards, personal watercraft, and jetboats (except jet
Marine Engines boats using automotive engine blocks)
Corporate-average standards phase in between 1998 and 2006. All
engines are certified to an emission level and get an engine label. The
nine-year declining average allows you to gradually introduce emission
controls across your product line. (See 40 CFR Part 91.) The California
Air Resources Board adopted more stringent controls for these engines
(http://www.arb.ca.gov)
> Printed on Recycled Paper
-------
sterndrive, air
commercial)
We intend to set emission standards in 2000 for these engines. The
proposal will include several provisions to give flexibility for small-
volume production.
Auxiliary 25hp
You must certify these engines to the requirements for the same size
land-based nonroad spark-ignition engines. These standards first applied
in 1997; we completed a second phase of emission standards for these
engines that phase in between 2001 and 2005. (See 40 CFR Part 90.)
Auxiliary over 25 hp
You will need to certify these engines to the requirements for the same
size land-based nonroad spark-ignition engines. The California Air
Resources Board has standards for these engines made in 2004 and later.
We intend to extend these emission standards nationwide on the same
schedule.
Engines
All under 37 kW, with per-cylinder
over 50 cc, including: commercial
recreational stern drive inboard propulsion auxiliary
We set standards for these engines in the context of a land-based control
program. The emission standards take effect in 1999 for engines below
19 kW, and in 2000 for larger engines. Some provisions apply uniquely
to marine engines. For example, if you modify a land-based engine from
another manufacturer for installation in a marine vessel, you can get up
All marine engines over 130 kW
The MARPOL Annex VI curve (NOx limits only) applies to engines
installed on vessels constructed on or after January 1, 2000, with exemp-
tions for military vessels, emergency engines, and certain other applica-
tions. Pending entry into force of MARPOL Annex VI, engines on ships
engaged in foreign trade should have a Statement of Compliance, issued
by EPA. After entry into force of the Annex, engines on ships engaged in
foreign trade must have an Engine International Air Pollution Prevention
(EIAPP) certificate, issued by EPA. These emission standards are
superseded for engines that must meet EPA requirements for marine
diesel engines.
-------
Commercial over 37 kW, including
with per-cyiinder up to 30
New engines with per-cylinder displacement up to 2.5 liters need to meet
EPA emission standards starting in 2004. New engines with per-cylinder
displacement between 2.5 and 30 liters need to meet EPA emission
standards starting in 2007. If you certify an engine to EPA standards,
you don't need an additional certificate to show that you meet the MAR-
POL NOx limits, though you may be subject to MARPOL record keep-
ing and inspection requirements. (See 40 CFR Part 94.)
Recreational marine engines over 37 kW
We intend to set emission standards in 2000 for these engines. The
proposal will include several provisions to give flexibility for small-
volume production.
Propulsion
Auxiliary Engine
Engine
to
A propulsion engine is an engine that moves a vessel through the water
or directs the movement of a vessel. This includes bow thrusters and
engines that use electrical power to propel the vessel.
An auxiliary engine is a marine engine that is not a propulsion engine.
A recreational marine engine is a propulsion marine engine above 37
kW that is intended by the manufacturer to be installed on a recreational
vessel.
Recreational
A recreational vessel is, in general, a vessel that is intended by the vessel
manufacturer to be operated primarily for pleasure, consistent with
Coast Guard definitions. See 40 CFR 94.2 for more information.
I my the
Yes. You may include some or all of the previous year's production in
starting with any engines you produce after January 1, 2003. Also, most
of these programs provide (or will provide) for banking of emission
credits if you certify your engines ahead of schedule.
-------
Are any of my
standards?
See our fact sheet entitled Marine Diesel Engine Emission Standards:
Scope of Application (EPA420-F-99-047).
do I to
Outboard/personal water craft final rule: 61 FR 52087, October 4, 1996
Nonroad SI engines under 19 kW Phase 1 final rule: 60 FR 34582, July
3, 1995
Nonroad SI engines under 19 kW Phase 2 final rule: 64 FR 15208,
March 3 0,1999
Nonroad CI engines final rule: 62 FR 50152, September 24, 1997
For
Additional documents on marine engine emission standards are available
electronically on the Office of Mobile Sources' web site at:
http://www.epa.gov/oms/marine.htm
Document information is also available by writing to:
U.S. Environmental Protection Agency
Office of Mobile Sources
NVFEL Library
2000 Traverwood Dr.
Ann Arbor, MI 48105
------- |