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Emission
Durability
Period and
Air Index Information
OnYour Engine
Emission
Label
Engines that are certified to meet the California Air Resources
Board (CARB) Tier 2 Emission Standards must display information
regarding the Emissions Durability Period and the Air Index. Briggs
& Stratton makes this information available to the consumer on our
emission labels. The engine emission 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 emission compliant for 125 hours of actual
engine running time.
Intermediate:
Engine is certified to be emission compliant for 250 hours of actual
engine running time.
Extended:
Engine is certified to be emission 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 wilt be certified to meet the United
States
Environmental
Protection
Agency
(USEPA)
Phase
2
emission 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 emission 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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