Air Index - Honda GX25 Owner's Manual

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.
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 4.
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

(Models certified for sale in California)
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
System Warranty for additional information.
Descriptive Term
Moderate
Intermediate
Extended
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.
ENGLISH
Emission Control
Applicable to Emissions Durability
Period
50 hours (0–80 cc, inclusive)
125 hours (greater than 80 cc)
125 hours (0–80 cc, inclusive)
250 hours (greater than 80 cc)
300 hours (0–80 cc, inclusive)
500 hours (greater than 80 cc)
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