Homelite UT20930 manual String Replacement, Cleaning the Exhaust Port and Muffler Spark Arrestor

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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.

SPRING

SPOOL

ARROWS ON

SPOOL

ANCHOR

HOLE

FIRST STRING

Fig. 16

FIRST STRING

SLOT

Fig. 17

SECOND

STRING

Fig. 18

SLOT

ARROWS ON

 

SPOOL

Fig. 19

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Contents Operators Manual Introduction Table of ContentsImportant Safety Instructions Specific Safety Rules for Trimmer USE Symbols Symbol Name ExplanationInstructions SpecificationsUnpacking Packing ListFeatures Grass DeflectorWing NUT Bolt Bracket AssemblyFront Handle Pieces Bolt Grass Deflector Lock WasherGrass Deflector Easy Reach See Figures 5Operating the Trimmer OperationFueling and Refueling the Trimmer Cutting Tips Advancing the StringCUT OFF Blade Wing NUT Edger Guide Edger Guide Operation Trim ‘N Edge onlySee Figures 10 Starting and Stopping NEW Prewound Spool MaintenanceSpool Replacement EZ Line TAP Advance System See Figures 14See Figures 16, 17, 18 String ReplacementCleaning the Exhaust Port and Muffler Spark Arrestor Arrows on Spool Anchor Hole First StringSpark Plug Replacing and Cleaning AIR FilterFuel CAP Storing the Trimmer 1 Month or LongerTroubleshooting Speed. See FigureIdle Speed Screw Mixture Needle Warranty Limited Warranty StatementWarranty Emissions Maintenance Schedule and Warranted Parts List Optional Muffler Guard Service PartsDescription Easy ReachService Repair Parts California Proposition
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