Air Index - Honda GXR120UT Owner's Manual

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Source of Emissions
The combustion process produces carbon monoxide, oxides of nitrogen,
and hydrocarbons. Control of hydrocarbons and oxides of nitrogen are
very important because, under certain conditions, they react to form
photochemical smog when subjected to sunlight. Carbon monoxide
does not react in the same way, but it is toxic.
Honda utilizes appropriate air/fuel ratios and other emissions control
systems to reduce the emissions of carbon monoxide, oxides of nitrogen,
and hydrocarbons. Additionally, Honda fuel systems utilize components
and control technologies to reduce evaporative emissions.
The U.S., California Clean Air Act, and Environment Canada
EPA, California, and Canadian regulations require all manufacturers to
furnish written instructions describing the operation and maintenance of
emission control systems.
The following instructions and procedures must be followed in order to
keep the emissions from your Honda engine within the emission
standards.
Tampering and Altering
Tampering is a violation of federal and California law.
Tampering with or altering the emission control system may increase
emissions beyond the legal limit. Among those acts that constitute
tampering are:
• Removal or alteration of any part of the intake, fuel, or exhaust
systems.
• Altering or defeating the governor linkage or speed-adjusting
mechanism to cause the engine to operate outside its design
parameters.
Problems That May Affect Emissions
If you are aware of any of the following symptoms, have your engine
inspected and repaired by your servicing dealer.
• Hard starting or stalling after starting.
• Rough idle.
• Misfiring or backfiring under load.
• Afterburning (backfiring).
• Black exhaust smoke or high fuel consumption.
Replacement Parts
The emissions control systems on your new Honda engine were
designed, built, and certified to conform with EPA, California, and
Canadian emissions regulations. We recommend the use of Honda
Genuine parts whenever you have maintenance done.
These original-design replacement parts are manufactured to the same
standards as the original parts, so you can be confident of their
performance. Honda cannot deny coverage under the emission warranty
solely for the use of non-Honda replacement parts or service performed
at a location other than an authorized Honda dealership; you may use
comparable EPA certified parts, and have service performed at non-
Honda locations. However, the use of replacement parts that are not of
the original design and quality may impair the effectiveness of your
emissions control system.
A manufacturer of an aftermarket part assumes the responsibility that
the part will not adversely affect emissions performance. The
manufacturer or rebuilder of the part must certify that use of the part will
not result in a failure of the engine to comply with emissions regulations.
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Maintenance
As the power equipment engine owner, you are responsible for
completing all required maintenance listed in your owner's manual.
Honda recommends that you retain all receipts covering maintenance on
your power equipment engine, but Honda cannot deny warranty
coverage solely for the lack of receipts or for your failure to ensure that all
scheduled maintenance has been completed.
Follow the maintenance schedule on page 7. Remember that this
schedule is based on the assumption that your engine will be used for its
designed purpose. Sustained high-load or high-temperature operation,
or use in dusty conditions, will require more frequent service.

Air Index

An Air Index Information label is applied to engines certified to an
emission durability time period in accordance with the requirements of
the California Air Resources Board.
The bar graph is intended to provide you, our customer, the ability to
compare the emissions performance of available engines. The lower the
Air Index, the less pollution.
The durability description is intended to provide you with information
relating to the engine's emission durability period.
The descriptive term indicates the useful life period for the engine's
emission control system. See your Emission Control System Warranty for
additional information.
Descriptive Term Applicable to Emission Durability Period
Moderate 50 hours (0–80 cc, inclusive)
125 hours (greater than 80 cc)
Intermediate 125 hours (0–80 cc, inclusive)
250 hours (greater than 80 cc)
Extended 300 hours (0–80 cc, inclusive)
500 hours (greater than 80 cc)
1,000 hours (225 cc and greater)
The Air Index Information hang tag/label must remain on the engine
until it is sold. Remove the hang tag before operating the engine.
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