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Look For Relevant
Emission
Durability
Period and
Air Index Information
On¥our
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
will 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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