Craftsman WEEDWACKER 358.796110 Operator's Manual page 18

LOOK FOR RELEVANT EMISSIONS DURABILITY PERIOD AND AIR INDEX
INFORMATION ON YOUR ENGINE EMISSIONS LABEL
Engines that are certified to meet the
California Air Resources Board
(CARB) Tier 2 Emissions Standards
must display information regarding the
Emissions Durability Period and Air
index. Sears makes this information
available to the consumer on our
emission labels and hang tags.
The Emissions Durability Period de-
scribes the number of hours of actual
running time for which the engine is
certified to be emissions compliant,
assuming proper maintenance in ac-
cordance with the operating and main-
tenance instructions. The following
categories are used:
Moderate: Engine is certified to be
emission compliant for 50 hours of ac-
tual engine running time.
Intermediate: Engine is certified to
be emission compliant for 125 hours
of actual engine running time.
Extended: Engine is certified to be
emission compliant for 300 hours of
actual engine running time.
For example, a typical consumer
string trimmer is used 5 to 10 hours
per year. Therefore, the Emissions
Durability Period of an engine with
an moderate rating would equate to 5
to 6 years.
The Air Index is a calculated number
describing the relative level of emis-
sions for specific engine family. The
lower the Air Index, the cleaner the
engine. This information is displayed
in graphical form on the emissions la-
bel or hang tag.
AFTER JULY 1, 2000, LOOK FOR
EMISSIONS COMPLIANCE PERIOD
ON ENGINE EMISSIONS COM-
PLIANCE LABEL
After July 1, 2000, certain Craftsman
engines will be certified to meet the
United States Environmental Protec-
tion Agency (U.S. EPA) Phase 2 Class
IV emissions standards. For Phase 2
Class IV certified engines, the Emis-
sions Compliance Period referred to
on the emissions compliance label in-
dicates the number of operating hours
for which the engine has been shown
to meet federal emission require-
ments. For engines equal to or great-
er than 20 cc, and less than 50 cc dis-
placement, Category C = 50 hours, B
= 125 hours, and A = 300 hours.
The displacement of Model Series
21000 engines is 34 cc, 21100 en-
gines is 40 cc.
This is a generic represen-
tation of the emissions
compliance label typically
found on a certified engine:
This engine is certified to be emissions compliant for the following use:
[] Moderate (50 hours)
[] Intermediate (125 hours)
[] Extended (300 hours)
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