Loading a weed eater with fresh trimmer line is an essential maintenance task that most owners will perform multiple times. The process involves removing the old line from the spool, winding new line on in the correct direction, and reassembling the trimmer head. The specific steps depend on your trimmer’s head design, as different models use different mechanisms to hold and feed the line. Understanding your head type before you start will save time and prevent common mistakes.
Determine Your Head Type Before Loading
Weed eater trimmer heads come in three primary designs: speed-feed, split-spool, and fixed-line heads. Each type loads differently, so identifying which one you have is the first step. Speed-feed heads allow you to load line without disassembling the head itself—you simply feed the line through a channel at the base of the head while the spool remains in place. Split-spool heads, sometimes called dual-line heads, feature a removable spool that separates into two halves, allowing you to wind line on one half at a time. Fixed-line heads require complete disassembly and involve winding line onto a stationary spool that stays inside the head housing.
Look at your trimmer head for identifying marks or arrows. Most manufacturers print directional arrows or instruction diagrams directly on the head or spool, indicating which head type you have and how to load it. If you cannot find these markings, check your trimmer’s owner’s manual, which will include diagrams and step-by-step loading instructions specific to your model. Some manufacturers also provide loading instructions on a sticker attached to the trimmer itself or on the spool inside the head.
Knowing your head type ensures you use the correct loading method and avoid damaging the head or installing the line incorrectly. Many loading problems stem from using the wrong procedure for the head type, so taking a moment to identify your head will prevent frustration later.
Remove the Head and Old Line
To access the trimmer head, first ensure the engine is completely off and cool. Most trimmer heads are secured with a single bolt or a quick-release collar located at the center of the head. Consult your manual for the specific removal method and any special tools needed. For heads with a bolt, use the appropriate wrench or socket to loosen and remove it. For quick-release collars, you can usually unscrew them by hand; if you encounter resistance, use a rubber mallet or soft-headed tool to gently tap the collar until it loosens.
Once the head is removed, look for the spool inside. On split-spool heads, the spool will separate into two halves once you release a clip or push-tab. On fixed-line heads, the spool remains in place inside the housing. Remove any old line still wound on the spool, discarding it. If the line is tangled or wrapped tightly, use small needle-nose pliers or a screwdriver to gently unwind and pry it free. Clean out any dried grass, sap, or debris from the spool and the head housing before loading new line.
Check the spool for cracks, warping, or damage. If the spool appears damaged, it should be replaced before loading new line. A cracked or warped spool may not feed line correctly and can cause jams or incomplete line feeding during use.
Wind the New Line Onto the Spool
Cut a new length of trimmer line according to your manual’s specifications. Most weed eaters use line lengths between 20 and 40 feet, depending on the head type and spool capacity. Using too little line wastes potential cutting time, while using too much may cause the line to jam or fail to feed. The exact length is printed in your manual or marked inside the trimmer head.
Locate the directional arrows on the spool or head; these indicate the direction you must wind the line. Wind the line tightly and evenly onto the spool, following the arrow direction. Loose or haphazard winding causes tangling and jamming during use. If you are loading a split-spool head with two line segments, wind one segment onto each half of the spool, maintaining even tension throughout. Wind until you have used the recommended length or until the spool is nearly full but not so full that the line bulges beyond the spool’s rim.
Once the line is wound, locate the small slot or eyelet on the spool—this is where the line ends will be secured. Insert one line end into this slot, then repeat with the other end. Some spools have two separate slots or keyholes, while others have a single slot where both ends fit. Ensure the line is seated firmly in the slots; loose ends can slip out during use and cause the line to unwind.
Reassemble and Test the Loaded Head
If you removed a split spool, snap the two halves back together carefully, ensuring the line ends remain in their slots. If you have a fixed-line head, the spool simply stays in place inside the housing. Reattach the trimmer head to the trimmer shaft using the bolt or quick-release collar. Tighten securely but do not over-tighten, as this can crack the head or strip the threads.
Before using the trimmer, perform a brief test. Start the engine and run it at full speed for a few seconds in an open area away from bystanders. Tap the head on the ground if it is a bump-feed head to see if the line feeds and extends properly. If the line does not advance or appears stuck, stop the engine immediately and recheck your loading. Verify that the line is wound in the correct direction and that the line ends are properly seated in their slots.
If the line feeds excessively or unwinds too quickly after one tap, you may have wound it too loosely or the eyelets may not be holding the line ends securely. Stop the engine, inspect the spool, and retighten if needed. A proper load should feed a controlled length of line with each tap, typically a few inches per tap.
Troubleshoot Common Loading Mistakes
One frequent error is winding the line in the wrong direction. Always follow the arrows on the spool or head exactly; winding counterclockwise when the arrows indicate clockwise will cause the line to jam or not advance. If you have wound the line backwards, unwind it completely and rewind in the correct direction. Another common mistake is leaving too much slack in the wound line, which causes tangling inside the head during use. Maintain even, firm tension as you wind to prevent this problem.
If the line keeps jamming after you load it, check that the eyelets are clear and that the line ends are properly seated in their slots. Debris in the eyelets is a frequent cause of jamming. Use a small brush or compressed air to clean out the openings before reloading. Additionally, verify that you are using the correct line diameter for your trimmer. Installing line that is too thick or too thin can cause feeding problems. Check your manual or the markings on the head for the correct diameter.
Line breakage during use can indicate that the line was wound too tightly, the spool was overfilled, or the line is old or of poor quality. If breakage occurs, stop and inspect the spool; if the line is wound compactly with no room to move, you have wound it too tight. Rewind more loosely, allowing the line to sit comfortably on the spool without excessive tension. If the line seems fine but breakage continues, consider replacing it with a fresh spool, as old line is more brittle and prone to snapping.
Safety and Maintenance Tips
Always ensure the engine is off and completely cool before servicing the trimmer head. Working on a hot engine or a spinning head can cause serious injury. Wear gloves to protect your hands from sharp line edges and any rough spots on the spool or head housing. If the trimmer has a spark plug wire, disconnect it or remove the spark plug entirely to prevent accidental engine start during maintenance.
Inspect your trimmer line regularly during the season and replace it when you notice significant wear, fraying, or frequent breakage. Fresh line cuts more efficiently and is less likely to jam or break. Store spare line in a cool, dry place, as trimmer line can become brittle if exposed to extreme heat or sunlight for extended periods. Most weed eaters benefit from line replacement every season or after 10 to 20 hours of use, depending on how frequently you trim and how thick the vegetation is.
