MAINTENANCE
STRING REPLACEMENT
See Figures 14, 15, 16 and 17.
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 2.7 m (9 ft.) long.
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 152 mm (6 in.) extended beyond the slot. Do not overfill. After winding the string, there should be at least 6 mm (1/4 in.) 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
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, a qualified service technician will need to remove these deposits to restore performance.
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.
SPRING | SPOOL |
ARROWS ON
SPOOL
ANCHOR
HOLE
FIRST STRING | Fig. 14 |
FIRST STRING
SLOT 
Fig. 15
SECOND
STRING
Fig. 16
SLOT | ARROWS ON |
| SPOOL |
Fig. 17
14