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EmJ_ions Information
Enginesthat are certified to meetthe CaliforniaAir Resources
Board(CARB)Tier 2 Emission Standards must display
information regardingthe Emissions Durabiiity Periodand Air
Index.Theengine manufacturer makesthis information
avaiiabteto the consumer on emission iabeis, Theengine
emission iabetwili indicate certification information,
TheEmissions Durability Period describesthe number of
hours of actual running time for which the engine is certified
to beemissions compliant, assuming proper maintenancein
accordancewith the Operating& MaintenanceInstructions.
Thefollowing categoriesare used:
Moderate: Engineis certified to be emission compliant for
125 hours of actual engine running time.
Intermediate: Engineis certified to beemission compliant
for 250 hours of actual engine runningtime.
Extended: Engineis certified to beemission compiiant for
500 hours of actual engine running time.
Forexample,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
equateto 10to 12 years.
Certainengineswiii be certified to meetthe United States
EnvironmentalProtection Agency (USEPA)Phase2 emission
standards. Forphase2 certified engines, the Emissions
OompiiancePeriod referredto on the Emissions Compliance
label indicatesthe number of operating hours for which the
engine hasbeen shown to meet Federalemission
requirements.
Forenginesiess than 225cc displacement:
CategoryC = 125 hours
CategoryB = 250 hours
CategoryA = 500 hours
Forenginesof 225 cc or more:
CategoryC = 250 hours
CategoryB =500 hours
CategoryA = 1000 hours
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