Direct Answer: How to Load a Strimmer
To load a strimmer, access the spool head by twisting or unclipping it (depending on your model), remove any old line, cut 4–6 meters of new trimmer line matching your spool’s gauge specification, and wind it tightly onto the spool in the direction indicated by arrows on the head. Thread the free ends through the eyelets on the head assembly, then reassemble and lock the cover. For automatic-feed systems, insert pre-cut line into the cartridge slot and lock it in place—no manual winding required.
Understanding Your Strimmer Type
Before loading, identify which mechanism your strimmer uses. Most strimmers fall into two categories:
- Manual Spool Systems: Require you to hand-wind trimmer line onto a removable or fixed spool. These are common on electric (corded and battery-powered) and petrol strimmers. The spool head typically unscrews or unclips from the shaft.
- Automatic Feed (Tap-Advance) Systems: Automatically dispense line as it wears. You insert pre-cut line into a cartridge slot rather than winding it manually. These are found on many modern battery-powered models and some petrol strimmers.
Check your user manual or the spool head itself for identification. Manual systems show winding-direction arrows; automatic systems display a cartridge slot or feed chamber.
Also note your trimmer line gauge, typically ranging from 1.3mm to 2.4mm in diameter. Using the wrong gauge can cause feeding problems or damage the head mechanism.
Preparing to Load Your Strimmer
Safety First
Always disconnect the power before loading or unloading. For battery models, remove the battery. For corded models, unplug from the outlet. For petrol strimmers, allow the engine to cool and ensure the spark plug wire is disconnected. Never attempt to load a strimmer while it is running or warm.
Accessing the Spool Head
The spool head sits at the end of the trimmer shaft. To access it:
- Twist-Off Heads: Grip the spool head firmly and turn counterclockwise. Some models require holding the shaft steady with your other hand. Rotate until the head separates completely.
- Clip-Release Heads: Look for two or three plastic clips or tabs on the sides of the head. Press or pull these inward simultaneously, then lift the cover away. The spool (or cartridge) will be exposed inside.
- Fixed Spool Systems: Some strimmers have a spool that doesn’t detach. Instead, you’ll thread line directly through fixed eyelets on the head. Consult your manual for the exact entry and exit points.
Removing Old or Tangled Line
If old line remains on the spool, remove it completely before loading new line. Gently unwind any visible line by hand. If line is jammed or wound too tightly, use needle-nose pliers to carefully pull it free. Check that the spool itself spins freely and shows no cracks or damage. If damaged, replace the spool head or cartridge before proceeding.
Cutting the Right Length of Line
Trimmer line comes in spools or precut segments. For manual loading:
- Standard capacity is 4–6 meters (13–20 feet) depending on your spool size.
- Check the maximum line length marked on the spool housing.
- Measure or estimate the correct length; most users cut slightly less than the maximum to allow room for winding.
- Use scissors or a utility knife for a clean cut. Avoid frayed or jagged edges, as these can jam during winding.
For automatic systems, manufacturers usually specify the exact precut length required (commonly 2–4 meters). Check your manual for the precise measurement.
Manual Loading Process: Winding Line onto the Spool
Step 1: Locate the Winding Direction
Examine your spool head closely. You’ll see arrows printed or embossed on the spool surface or head cover indicating the winding direction—usually clockwise or counterclockwise. This direction is critical. Winding in the wrong direction causes the line to unwind during use or feed improperly.
Step 2: Insert the Line into the Anchor Notch
Most spools have a small notch or hook at the edge designed to hold the starting end of the line. Insert approximately 5–10 centimeters of one end of your cut line into this notch, ensuring it’s secure and won’t slip out as you wind.
Step 3: Wind the Line Tightly and Evenly
Begin winding the line onto the spool in the direction indicated by the arrows. Keep tension steady and even throughout. Wind in neat, overlapping layers rather than piling line randomly. The line should be taut but not so tight that it compresses or deforms the spool. Aim for smooth, uniform layers that cover the spool width evenly. Continue winding until approximately 10–15 centimeters of line remains unwound (this excess will be threaded through the eyelets).
Step 4: Secure the Wound Line
Once wound, the spool should hold the line in place through tension alone. If your spool has a locking tab or slot, guide the final section of line into it to prevent unwinding during reassembly. Some spools have small grooves where the line naturally sits; position the line in these grooves for security.
Step 5: Thread Line Through the Eyelets
The spool head has one or two eyelets (small holes) where trimmer line exits the head. These are your line’s exit points during operation. Thread the two free ends of your wound line through these eyelets—one end through each eyelet if there are two, or both ends if there’s only one. The line should pass straight through without kinks or twists. Leave 5–10 centimeters of line extending beyond each eyelet for proper cutting length during operation.
Step 6: Reassemble the Spool Head
If your head unscrews, hold the spool carefully in place and screw the head cover back on by turning clockwise until snug. Do not over-tighten, as this can crack the plastic. If your head uses clips, align the clips with their corresponding slots and press firmly until they click into place. Gently rotate the spool by hand to confirm it spins freely and the line doesn’t catch or bind.
Automatic Feed System Loading
Automatic or tap-advance systems simplify loading significantly:
- Prepare Your Line: Cut a length of trimmer line to the specification listed in your manual (typically 2–4 meters).
- Locate the Cartridge Slot: Open the head cover to reveal the cartridge chamber or line feed slot. This is usually a small rectangular opening.
- Insert the Line: Feed one end of your precut line into the designated slot. Some systems have two slots (one for each line end); others use a single slot where you feed both ends in sequence.
- Lock the Cartridge: Once inserted, press or twist the cartridge cover to lock it in place. Confirm it’s seated securely and shows no gaps.
- Test the Feed: Gently pull on the exposed line ends. They should not budge; the cartridge should hold them firmly. If the line slides freely, the cartridge isn’t locked properly.
Automatic systems are designed to feed line as it shortens during use. Some require manual taps against the ground to advance fresh line, while others advance automatically. Your manual will specify which method applies to your model.
Common Loading Mistakes to Avoid
Winding in the Wrong Direction
This is the most frequent error. If line is wound opposite to the arrows, it will unwind rapidly during operation or refuse to feed at all. Always double-check the arrow direction before winding, and test by hand rotation after winding to ensure smooth spooling.
Using Incorrect Line Gauge
Using line that’s too thick can jam the feed mechanism or damage the head. Using line that’s too thin may not cut efficiently and can break prematurely. Check your manual for the exact gauge requirement and purchase line matching that specification.
Winding Too Loosely or Too Tightly
Loose winding causes poor line tension and uneven feeding. Tight winding can deform the spool or make line difficult to feed. Aim for moderate, even tension—the line should feel firm but not compressed.
Threading Line Through Eyelets Incorrectly
If line is twisted, kinked, or not fully threaded through the eyelets, it will snag during operation. Ensure both line ends pass straight through without obstruction and extend evenly on both sides.
Exceeding Maximum Line Length
Overfilling the spool causes line to bind or escape during operation. Always adhere to the maximum length marked on your spool housing.
Failing to Remove Old Line Completely
Remnants of old line create tangles and prevent new line from winding evenly. Clear the spool entirely before loading fresh line.
Testing and Verification
Visual Inspection
Before using the strimmer, inspect your loaded head:
- Confirm the line extends evenly from both eyelets.
- Verify no line is twisted, kinked, or bunched around the head.
- Check that the spool spins freely when rotated by hand.
- Ensure the head cover is locked securely with no gaps or loose parts.
Dry Run Test
With the strimmer still unplugged or with the battery removed, gently pull on the exposed line ends. They should not move freely; the spool should resist slight tension. If line feeds out easily, the spool isn’t wound tightly enough or the cartridge isn’t locked (for automatic systems).
Live Test (Under Controlled Conditions)
Once satisfied with your loading, reconnect power or reinstall the battery. Hold the strimmer in a safe operating position over an empty area (away from people, animals, and property). Start the engine or activate the motor briefly. Listen and watch for:
- Smooth, even line rotation without vibration or chattering.
- No line whipping erratically or escaping from the head.
- Consistent line length on both sides during rotation.
If you notice jerking, line slapping, or unusual noise, stop immediately, disconnect power, and recheck your loading. Adjust as needed and test again.
During Actual Use
When trimming, monitor line wear. As you cut, the line gradually shortens. For manual systems, when line becomes too short to cut effectively, reload following the same steps. For automatic systems, tap the head against the ground as per your manual’s instructions to advance fresh line automatically.
Frequently Asked Questions
Q: What happens if I wind the trimmer line in the wrong direction?
A: Winding in the wrong direction causes the line to unwind as the spool rotates, resulting in rapid line loss, poor cutting performance, or the line tangling inside the head. Always match the winding direction to the arrows on your spool head. If you’ve already wound it incorrectly, unwind it completely and rewind in the correct direction.
Q: Can I use any trimmer line gauge, or must it match my manual’s specification?
A: You must use the exact gauge specified in your manual. Using incorrect gauge can cause feeding problems, damage the head mechanism, or create safety hazards. Gauge is typically printed on the line spool or listed in your manual. When purchasing replacement line, match the diameter exactly (e.g., 2.0mm, 2.4mm).
Q: How often do I need to reload my strimmer?
A: This depends on usage frequency and cutting intensity. For regular residential use, you may reload every few weeks to a few months. For automatic-feed systems, tap the head to advance new line as the current line wears down. For manual systems, reload when the line becomes too short to cut effectively. Always keep spare trimmer line on hand for unexpected depletion during a job.
Q: My strimmer line keeps tangling inside the head. What am I doing wrong?
A: Tangling usually results from winding in the wrong direction, winding too loosely, threading line incorrectly through the eyelets, or using damaged line. Verify you’re winding in the correct direction indicated by arrows, maintain steady tension, and ensure line passes straight through eyelets without kinks. If tangling persists, inspect the spool for cracks or deformation and replace it if necessary.
Q: Is it safe to load a strimmer while the battery is installed?
A: No. Always remove the battery before loading, unloading, or performing any maintenance on your strimmer. This prevents accidental activation of the motor, which could cause serious injury. Allow petrol strimmers to cool and disconnect the spark plug wire before working on the head.
Q: Can I use thicker trimmer line for tougher cutting jobs?
A: Only if your manual approves it. Using line thicker than specified can overwork the motor, damage the feed mechanism, or create imbalances that affect strimmer handling. If standard line wears too quickly on tough jobs, consider a petrol-powered strimmer or brush cutter designed for heavy-duty use, rather than exceeding your current model’s specifications.
