Homelite UT20763 - Manual (Page 14)

Page 14
MAINTENANCE
STRING REPLACEMENT
See Figures 16, 17, 18 and 19.
1. Stop the engine, disconnect the spark plug wire. Hold
the string head and unscrew the spool retainer. Turn
counterclockwise.
2. Remove the spool from the string head. NOTE: Keep
the spring attached to the spool. Remove any old string
remaining on the spool.
3. Cut two pieces of string, each being approximately 9 ft.
(2.7 m) long. Use only .080 in. (2.0 mm) diameter
monofilament string.
4. Insert the first string into the anchor hole in the upper
part of the spool. Wind the first string around the upper
part of the spool counterclockwise, as shown by the
arrows on the spool. Place string in the slot on upper
spool flange, leaving about 6 in. (152 mm) extended
beyond the slot. Do not overfill. After winding the string,
there should be at least 1/4 in. (6 mm) between the
wound string and the outside edge of the spool.
5. Repeat above step with second string, using the bottom
part of spool. Do not overfill.
6. Replace the spool and the spool retainer. Refer to "Spool
Replacement " earlier in this manual.
CLEANING THE EXHAUST PORT AND
MUFFLER
NOTE: Depending on the type of fuel used, the type and
amount of oil used, and/or your operating conditions, the
exhaust port and muffler may become blocked with carbon
deposits. If you notice a power loss with your gas powered
tool, you may need to remove these deposits to restore
performance. We highly recommended 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 your
product. Spark arrestors may be in different locations
depending on the model purchased. Please contact your
nearest service dealer for the location of the spark arrestor
for your model.
Cleaning Instructions:
■
■ ■ ■ ■ Remove the spark arrestor from the muffler.
■ ■ ■ ■ ■ If your spark arrestor is made of a fiberglass material,
discard and replace.
■ ■ ■ ■ ■ If your spark arrestor is made of a metal material follow
these cleaning instructions:
1. Spray the spark arrestor with a quality carbon
cleaner.
2. Gently clean using a wire brush.
3. Install the new or cleaned spark arrestor and reas-
semble completely before use.
Fig. 18
Fig. 19
SPRING
Fig. 17
SLOT ARROWS ON
SPOOL
SECOND
STRING
FIRST STRING Fig. 16
SPOOL
ANCHOR
HOLE
ARROWS ON
SPOOL
FIRST STRING
SLOT