Understanding the Question: What Does ‘Restringing a Strimmer’ Involve?
A strimmer, also known as a string trimmer or weed whacker, uses a rapidly spinning nylon line to cut grass and weeds. Over time, this cutting line wears down, breaks, or becomes too short to use effectively. Restringing is the essential maintenance task of replacing this old line with a new length to restore your tool’s cutting performance.
The process varies significantly depending on the type of trimmer head your machine uses. The three most common designs are:
- Bump-Feed (Tap-and-Go) Head: The most common type. You tap the head on the ground while it’s spinning to release more line from an internal spool.
- Fixed-Line Head: Uses pre-cut lengths of line that are manually inserted and secured. There is no internal spool.
- Auto-Feed Head: Automatically feeds line as it wears, often triggered by the centrifugal force of the spinning head.
Identifying your head type is the crucial first step. Check your owner’s manual or look for markings on the head itself. The following guide provides universal principles, with a detailed walkthrough for the most common bump-feed style.
Key Factors to Consider Before You Start
Proper preparation ensures safety and a successful restringing.
What line gauge (diameter) should I use?
Using the correct line thickness is critical. A line that is too thick may not feed properly and can strain the trimmer’s motor, while a line that is too thin will break constantly. The correct gauge is specified in your trimmer’s manual and is often printed on the trimmer head or spool. Common gauges range from 1.5 mm to 3.0 mm. Always consult your manufacturer’s manual for the exact specification for your model.
How much line do I need?
The required length depends on your spool’s capacity. A general rule of thumb for bump-feed spools is to measure a length of line roughly equal to the distance from your shoulder to the ground, then double it. However, overloading the spool can cause jams. It’s best to measure the old line before removing it or check your manual for a recommended length.
Essential Safety Steps
- Disconnect Power: For electric or battery trimmers, unplug the unit or remove the battery. For petrol models, remove the spark plug wire.
- Wear Gloves: The cut ends of nylon line can be sharp, and the trimmer head may have debris.
- Work on a Clean Surface: A clear, flat area makes it easier to handle small parts like clips or retaining nuts.
Step-by-Step Guide: Restringing a Bump-Feed Trimmer Head
This is the most common procedure. Follow these steps carefully.
Step 1: Remove the Trimmer Head or Spool
Most bump-feed heads are designed for easy removal. Look for a button, knob, or retaining nut on the bottom or side of the head. You may need to press two buttons on opposite sides of the head simultaneously to release it. Some models require you to lock the gear head (often with a small screwdriver through a hole) before unscrewing the head. Refer to your manual for the specific release mechanism.
Step 2: Remove Old Line
Once the spool is out, unwind and remove any remaining old line. Clean out any grass clippings or debris from the spool housing and eyelets (the holes the line feeds through).
Step 3: Cut and Insert New Line
Cut a fresh length of the correct gauge line. Find the anchor point on the spool—this is often a small hole, notch, or clip in the center. Insert one end of the new line into this anchor point. There may be a diagram on the spool indicating which way to wind.
Step 4: Wind the Line Correctly
Wind the line tightly and evenly onto the spool in the direction indicated by arrows molded into the plastic. Keep tension on the line as you wind to prevent tangles. Leave about 15-20 cm (6-8 inches) of line unwound.
Step 5: Feed Line Through Eyelets and Reassemble
Feed the loose ends of the line through the eyelets on the outer trimmer head. Secure the spool back into the head, ensuring it clicks or locks into place. Gently pull on the line ends to ensure they are free to move.
Step 6: Test the Feed Mechanism
Reconnect the power source. While holding the trimmer safely off the ground, tap the bottom of the head firmly on a hard surface. The line should advance. If it doesn’t, disassemble and check that the line is wound in the correct direction and not caught on any internal parts.
Restringing Other Head Types and Troubleshooting Common Issues
Fixed-Line and Auto-Feed Heads
Fixed-Line Heads: These are simpler. The head typically has slots or holes. You cut a specific length of line (often 2-3 pieces), insert each piece through the head until it’s centered, and secure it using built-in clips, notches, or a locking plate. There is no winding involved.
Auto-Feed Heads: These often use a pre-wound, proprietary spool cartridge. To restring, you typically remove the old cartridge and snap in a new one. Some models allow you to reload with bulk line, but the procedure is specific to the design.
Common Problems and Solutions
- Line Jamming: Usually caused by overfilling the spool, winding in the wrong direction, or using line that is too thick. Disassemble, check the winding direction arrows, and ensure you’re using the recommended gauge.
- Line Snapping Immediately: This can happen if the line is low quality, the wrong gauge, or if you’re cutting against hard surfaces like walls or fences. Use a slightly thicker line for tough conditions.
- Line Won’t Feed (Bump-Feed): Ensure the line is wound correctly and the spool is seated properly. The spring mechanism inside the head may be worn or jammed with debris.
Direct Answer: Quick Recap and Frequently Asked Questions
To restring a strimmer, first disconnect its power source. Remove the trimmer head or spool, discard the old line, and cut a new length of the correct gauge line. Anchor one end to the spool, wind it in the direction indicated by arrows, feed the ends through the head’s eyelets, and reassemble. For bump-feed heads, tap the head on the ground to advance the line. Always consult your specific model’s manual, as procedures vary.
Frequently Asked Questions
What is the fastest way to restring a strimmer?
The fastest method is to use pre-wound spool cartridges if your model accepts them. For bulk line, practice the winding process for your specific head to become efficient. Keeping a spare pre-wound spool on hand is also a quick solution.
Can I use any brand of trimmer line?
As long as the line matches the diameter (gauge) specified in your manual, you can use any brand. However, higher-quality lines may offer better durability and cutting performance.
How often should I expect to restring my trimmer?
This depends entirely on usage. For occasional light use, it might be once a season. For frequent use in tough conditions, you may need to restring every few uses. Inspect the line before each use and replace it when it becomes too short to feed effectively.
Is it safe to restring a strimmer without disconnecting the power?
No, absolutely not. Always disconnect the power source (unplug, remove battery, or disconnect spark plug) before performing any maintenance on the trimmer head. An accidental activation could cause serious injury.
