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Look For Relevant Emissions Durability Period and
Air Index Information OnYour Engine Emissions Label
Engines that are certified to meet the California Air Resources
Board (CARB) Tier 2 Emissions Standard must display
information regarding the Emissions Durability Period and the
Air Index. Briggs & Stratton makes this information available to
the consumer on our emissions labels. The engine emissions
label will indicate certification information.
The Emissions Durability Period describes the number of
hours of actual running time for which the engine is certified to
be emissions compliant, assuming proper maintenance in
accordance with the Operating & Maintenance Instructions.
The following categories are used:
Moderate:
Engine is certified to be emissions compliant for 125 hours of
actual engine running time.
Intermediate:
Engine is certified to be emissions compliant for 250 hours of
actual engine running time.
Extended:
Engine is certified to be emissions compliant for 500 hours of
actual engine running time. For example, a typical walk-behind
lawn mower is used 20 to 25 hours per year. Therefore, the
Emissions Durability Period of an engine with an
intermediate rating would equate to 10 to 12 years.
Certain Briggs & Stratton engines will be certified to meet the
United States Environmental Protection Agency (USEPA)
Phase 2 emissions standards. For Phase 2 certified engines,
the Emissions Compliance Period referred to on the Emissions
Compliance label indicates the number of operating hours for
which the engine has been shown to meet Federal emissions
requirements.
For engines less than 225 cc displacement.
Category C = 125 hours
Category B = 250 hours
Category A = 500 hours
For engines of 225 cc or more displacement.
Category C = 250 hours
Category B = 500 hours
Category A = 1000 hours
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