Emissions Durability Period and Air index
Information On Your Engine Emissions Labe_
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 Air Index. The engine manufacturer makes this information available to the consumer on emission labels.
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 walkobehind 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.
The Air hdex is a calculated number describing the relative level of emissions for a specific engine family. The lower the Air Index, the cleaner the engine. This information is displayed in graphical form on the emissions label.
Emissions Compliance Period On Engine
Emissions Compliance Labe_
After July 1,2000 certain Sears 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 labe! 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, B = 250 hours and A = 500 hours. For engines of 225 cc or more, Category C = 250 hours, B = 500 hours and A = 1000 hours.
This engine has a moderate rating with and Air Index of 3.
The EPA Emissions compliance period is Category C. The
displacement of this engine is 190 cc.
Below is a generic representation of the emission label typically found on a certified engine.
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