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Low-Pollution Marine Engines: GEE QN HOARD
A Cleaner Way to Enjoy Boating NEW ENGLAND CLEAN ENGINE PARTNERS
The Problem of Marine Engine Pollution
New England has thousands of ponds and lakes, and thousands
of miles of river and coastal waters. These water bodies provide
outdoor enthusiasts with many opportunities to enjoy boating.
Until recently, most outboard engines and personal watercraft
were powered by conventional carbureted two-stroke marine en-
gines. These traditional engines have adverse impacts on the
environment. Up to 30% of the fuel passes through the combus-
lion chamber unburned or partially burned, thereby being re-
leased directly into the water and air as pollution.
• In the air, unburned gasoline results in hydro-carbon
emissions, which contribute to the formation of ground-
level ozone or smog. Smog can irritate the respiratory
system and aggravate existing respiratory conditions such
as asthma.
• In the water, gasoline elevates concentrations of benzene,
MTBE, and other toxics.
Low-Pollution Marine
Engines reduce water
pollution by reducing
the amount of
gasoline re/eased
into surface waters.

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Low-Pollution Marine Engines are Now Available
The GOOD NEWS is that cleaner, low-pollution outboard and personal watercraft marine
engines are available from New England marine engine retailers. These engines are better
for the environment, easier to maintain, and more fuel efficient. They generally cost more, but
the benefits are substantial for the environment, for your boating enjoyment, and for saving
money in the long run.
Two Types of Low-Pollution Engines
• 4-Stroke Engines
This technology prevents unburned fuel from escaping through the exhaust
valve, which significantly reduces hydrocarbon emissions. No oil mixing with
gasoline also improves overall engine performance.
• 2-Stroke Direct Fuel Injection Engines
New technology two-stroke engines feature direct fuel injection which directly
introduces the fuel into the combustion chamber. As a result, the up to 30% fuel loss
experienced with the traditional technology is eliminated, with an overall fuel
economy improvement.

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Benefits of Low-Pollution
Marine Engines
• Burn 35% to 50% less gas
• Use up to 50% less oil
cleaner, low-pollution • Save money over the life of the engine
outboard and personal
watercraft marine • Reduce air emissions by 75% or more
engines are better for
the environment easier • Reduce water pollution by reducing
to maintain, and more the amount of gasoline released into
fuel efficient surface waters
• Are easier to start
• Have a more precise throffle response
• Are quieter
• Reduce smoke and fumes
• Are better for New England’s environment!

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F ,
ith the cooperation of marine engine manufacturers, U.S. EPA has
issued regulations designed to significantly reduce the amount of
pollutants released from outboard and personal watercroft engines.
From 1998 to 2006, average air emission standards for outboard
and personal wotercraft engine manufacturers will become
increasingly more stringent. Controlling these exhaust emissions
will result in on unprecedented 75% reduction in hydrocarbon
emissions Ofrom these engines by the year 2025. To achieve the
yearly emissions reductions required by the regulations, it is
anticipated that manufacturers will each year build increasing
numbers of lower emission engines.
To encourage consumers to purchase cleaner burning marine
engines before the final standard goes into effect in 2006, EPA New England
is teaming up with New England state environmental agencies, the National
MarIne Manufacturers Association, the Marine Retailers Association of
America, and New England state marine trades associations in launching a
New England-wide Clean Marine Engine Initiative. These new engines
deliver improved performance, reduced fuel usage and reduced emissions.
Although the new marine engines cost about 15% more than traditional ones,
savings from decreased fuel consumption help offset the higher purchase
price, resulting in a “win-win” situation for both consumers and the environment.
1
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ho-Friendly Booting Tips
The fol Io wing are some commonly known fueling
and engine maintenance practices:
Fueling
Proper fueling reduces the infroduction
olgasoline into the water
• Ensure boat stability when fueling
• Use a spill-proof gasoline container
• Use fuel collars to capture splash/drips
• Use bilge pillows and engine pads to
absorb oils and fuels, and dispose of
them properly
• Close the vent on portable gas tanks
when the engine is not in use or when
tank is stored
• Do not rely on automatic nozzle shutoffs,
the fuel filling nozzle should be attended
at all times
• Avoid topping off gas tanks
Engine Maintenance
Good engihe maintenance improves
operating efficiency and reduces emissions.
• Limit engine operation at full throttle,
and eliminate unnecessary idling
• Repair gas and oil leaks immediately
• Check, clean and flush engine away
from the water
• Keep engine properly tuned
• Pre pare engines properly for winter
storage
• Do not fog the engine in the water
• Contain all waste and recycle or
dispose of properly

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