Briggs & Stratton 90000 Operator's Manual page 13

Coverage shall extend to the failure of any engine components caused by the failure
of any warranted emissions parts.
4. Claims and Coverage Exclusions
Warranty claims shall be filed according to the provisions of the B&S engine warranty
policy. Warranty coverage does not apply to failures of emissions parts that are not
original equipment B&S parts or to parts that fail due to abuse, neglect, or improper
maintenance as set forth in the B&S engine warranty policy. B&S is not liable for
warranty coverage of failures of emissions parts caused by the use of add-on or
modified parts.
Look For Relevant Emissions Durability Period and Air Index
Information On Your Small Off-Road Engine Emissions Label
Engines that are certified to meet the California Air Resources Board (CARB) small off-
road Emissions Standard must display information regarding the Emissions Durability
Period and the Air Index. Briggs & Stratton makes this information available to the consumer
on our emissions labels. The engine emissions 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 Operator's Manual. The following categories are used:
Moderate:
Engines at or less than 80 cc displacement are certified to be emissions compliant for 50
hours of actual engine running time. Engines greater than 80 cc displacement are certified
to be emissions compliant for 125 hours of actual engine running time.
Intermediate:
Engines at or less than 80 cc displacement are certified to be emissions compliant for 125
hours of actual engine running time. Engines greater than 80 cc displacement are certified
to be emissions compliant for 250 hours of actual engine running time.
Extended:
Engines at or less than 80 cc displacement are certified to be emissions compliant for 300
hours of actual engine running time. Engines greater than 80 cc displacement are certified
to be emissions 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.
Briggs & Stratton engines are certified to meet the United States Environmental Protection
Agency (USEPA) Phase 2 or Phase 3 emissions standards. 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 emissions requirements.
For engines at or less than 80 cc displacement:
Category C = 50 hours, Category B = 125 hours, Category A = 300 hours
For engines greater than 80 cc displacement and 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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