Direct Answer: How to Change Weed Wacker String
To change weed wacker string, first ensure the trimmer is off, disconnect the spark plug or remove the battery, and let the engine cool. Remove the trimmer head cap by pressing the release tabs or unscrewing it, depending on your model. Take out the old spool, clean it, and wind the new trimmer line onto it according to the directional arrows. Finally, thread the line ends through the head’s eyelets, reassemble the cap, and test the feed mechanism.
What Does Changing Weed Wacker String Involve?
Changing the string on a weed wacker (also known as a string trimmer or line trimmer) is a routine maintenance task that restores the tool’s cutting ability. The trimmer line, made of durable nylon, wears down from contact with grass, weeds, and hard surfaces. Replacing it involves removing the old, worn line from the spool, winding a new length of line onto the spool in the correct direction, and reassembling the trimmer head.
The process requires no special tools for most models, but you will need the correct replacement line. The specific steps can vary slightly depending on whether your trimmer has a bump-feed head (which releases more line when tapped on the ground) or a fixed-line head (which requires manual replacement of pre-cut line segments).
Key Factors to Consider Before You Start
Identify Your Trimmer Head Type
The two most common head types are:
- Bump-Feed Head: Features a spool that holds a long, continuous piece of line. Line is advanced by tapping the head on the ground during use.
- Fixed-Line Head: Uses short, pre-cut pieces of line that are inserted directly into the head. These heads are simpler but require you to replace each line segment individually.
Choose the Correct Trimmer Line
Consult your owner’s manual or check the markings on the old spool for the recommended line diameter (e.g., 0.065″, 0.080″, 0.095″) and maximum length. Using the wrong diameter can cause poor performance, jamming, or damage to the trimmer’s gear head.
Safety First
Before performing any maintenance:
- Turn the trimmer off completely.
- Disconnect the spark plug wire (for gas models) or remove the battery (for electric models) to prevent accidental startup.
- Allow the engine and clutch housing to cool if the trimmer was recently used.
- Wear work gloves to protect your hands from sharp line ends and debris.
Step-by-Step Guide: How to Change Weed Wacker String
Step 1: Remove the Trimmer Head Cap
Locate the tabs or buttons on the sides of the trimmer head cap. Press them inward simultaneously and pull the cap straight off. For some models, you may need to unscrew the cap by turning it counter-clockwise. Once the cap is off, lift out the spool.
Step 2: Remove the Old Line and Clean the Spool
Unwind and discard any remaining old line from the spool. Clean the spool, the inside of the head, and the eyelets (the small holes where the line exits) to remove grass clippings and debris. This ensures smooth line feeding.
Step 3: Cut and Anchor the New Line
Cut a new piece of trimmer line to the length specified in your manual (typically 10 to 25 feet). Find the anchor slot or hole on the spool. Insert one end of the new line into this anchor point.
Step 4: Wind the Line onto the Spool
Wind the line onto the spool in the direction of the arrow printed on the spool. Keep the line tight and wind it evenly in neat layers. Leave about 4 to 6 inches of line unwound at the end.
Step 5: Thread the Line and Reassemble
Thread the two loose ends of the line through the corresponding eyelets in the trimmer head. Place the wound spool back into the head, ensuring it seats properly. Snap or screw the cap back into place until it clicks or is snug.
Step 6: Test the Feed
For bump-feed heads, lightly tap the head on the ground to advance the line. For fixed-line heads, ensure the lines are securely seated. Your trimmer is now ready for use.
Troubleshooting and Tips for Common Trimmer Head Types
Line Won’t Feed (Bump-Feed)
If the line doesn’t advance when you tap the head, check that the spool is wound correctly in the direction of the arrow. Also, ensure the line isn’t tangled and that the eyelets are clear of debris.
Line Keeps Breaking
Frequent line breakage can indicate you are using the wrong line diameter, hitting hard objects (like fences or rocks), or that the line is old and brittle. Always use the manufacturer-recommended line and try to trim at a steady pace.
Replacing Fixed-Line Trimmer Heads
For fixed-line heads, simply pull out the old line segments. Cut new pieces to the length specified (often 8 to 10 inches each). Insert one end of a new line into the designated slot or hole in the head until it locks in place. Repeat for the other side.
Maintenance for Longer Line Life
To make your trimmer line last longer, avoid trimming over hard surfaces like concrete or gravel. Keep the head clean and free of tangled grass. Store your trimmer in a cool, dry place away from direct sunlight, which can degrade the nylon line.
Frequently Asked Questions
What is the best type of trimmer line?
The best line depends on your trimming needs. Round line is durable and good for general use. Twisted or serrated line cuts more efficiently and reduces noise. Square line is more aggressive for thick weeds. Always choose the diameter and shape recommended for your specific trimmer model.
How often should I replace the string on my weed wacker?
Replace the string whenever it becomes too short to feed properly, breaks frequently, or shows signs of wear like fraying or brittleness. For regular homeowners, this might be once or twice per season, depending on usage.
Can I use any brand of trimmer line?
Yes, as long as the line’s diameter and shape match your trimmer’s specifications. Most brands are universal. However, always refer to your owner’s manual for the exact recommended line size to ensure optimal performance and prevent damage.
Why does my trimmer line keep jamming?
Line jamming is often caused by winding the line onto the spool in the wrong direction, using line that is too thick, or having debris stuck in the head. Ensure the line is wound tightly and evenly, and clean the head thoroughly each time you replace the line.
