Craftsman 3800 Operation Manual - Page 33
regarding the Emissions Durability Period and Air Index.
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Emission information Enginesthat are certified to meet the California Air Resources Board (CARB) Emission Standards must display information regarding the Emissions Durability Period and Air Index. The engine manufacturer makesthis information availableto the consumer on emission labels. The engine emission label will indicate certification information. The EmissionsDurabilityPeriod describes the number of hours of actual running time for which the engine is certified to be emissions compliant, assuming proper maintenancein accordancewith 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. Forexample, a typical walk-behind lawn mower is used 20 to 25 hours per year. Therefore, the EmissionsDurability Period of an engine with an intermediate rating would equateto 10 to 12 years. Certain 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 Federalemission requirements. For engines less than 225 cc displacement: CategoryC = 125 hours Category B = 250 hours CategoryA = 500 hours. For engines of 225 cc or more displacement: CategoryC = 250 hours Category B = 500 hours CategoryA = 1000 hours. 33