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21
MAINTENANCE
CLEANING THE EXHAUST PORT AND
MUFFLER
Depending on the type of fuel used, the type and
amount of oil used, and/or your operating conditions, the
exhaust port, muffler, and/or spark arrestor screen may
become blocked with carbon deposits. If you notice a
power loss with this gas-powered product, you may need
to remove these deposits to restore performance. We highly
recommend that only qualified service technicians perform
this service.
SPARK ARRESTOR
The spark arrestor must be cleaned or replaced every 25
hours or yearly to ensure proper performance of the product.
Spark arrestors may be in different locations depending on
the model purchased. Please contact the nearest service
dealer for the location of the spark arrestor for this model.
REPLACING AND CLEANING AIR FILTER
See Figures 28 - 29.
A wet or dirty air filter can affect the way the engine starts,
performs, and wears. The air filter should be checked and
cleaned after 5 hours of operation. For best performance,
the air filter should be replaced once each year.
To clean the air filter:
Loosen the knob on the air filter cover.
Remove the cover.
Lift the edge of the air filter carefully and peel it out.
Wash the air filter with warm, soapy water.
Rinse and squeeze to dry.
Reinstall the air filter.
NOTE: Make sure the filter is seated properly inside the
cover. Installing the filter incorrectly will allow dirt to enter
the engine, causing rapid engine wear.
� Reinstall the cover.
Tighten knob to secure.
FUEL CAP
WARNING:
A leaking fuel cap is a fire hazard and must be replaced
immediately.
The fuel cap contains a non-serviceable filter and a check
valve. A clogged fuel filter will cause poor engine perfor-
mance. If performance improves when the fuel cap is loos
-
ened, check valve may be faulty or filter clogged. Replace
fuel cap if required.
SPARK PLUG REPLACEMENT
This engine uses a Champion RCJ-6Y or NGK BPMR7A
spark plug with .025 in. electrode gap. Use an exact re-
placement and replace annually.
Fig. 28
AIR FILTER COVER
AIR FILTER
Fig. 29
AIR FILTER
BASE
STORAGE (1 MONTH OR LONGER)
Drain all fuel from tank into a container approved for
gasoline. Run engine until it stops.
Clean all foreign material from the trimmer. Store idle unit
indoors in a dry, well-ventilated area that is inaccessible
to children. Keep away from corrosive agents such as
garden chemicals and de-icing salts.
Abide by all ISO and local regulations for the safe storage
and handling of gasoline.
AIR FILTER
COVER
KNOB
PULL COVER
TO OPEN