Introduction
Learning how to load a bump head weed eater is a fundamental skill for anyone who maintains a lawn, garden, or larger property. A bump‑head (often called “tap & go”) feeds fresh cutting line automatically when you tap the head against the ground, keeping the trimmer running smoothly without constant manual adjustments. While the concept is simple, the actual reloading process varies between brands, line diameters, and head designs. This guide walks you through every step, from understanding the mechanism to troubleshooting common issues, so you can reload quickly, safely, and get back to trimming.
Table of Contents
- Understanding Bump Head Weed Eaters
- Tools and Materials Needed
- Safety Precautions
- Step‑by‑Step: How to Load a Bump Head Weed Eater
- Detailed Walkthrough for Common Models
- Comparison Table: Bump Head vs. Fixed Line vs. Automatic Feed
- Tips and Best Practices
- Common Mistakes and How to Avoid Them
- Maintenance After Reloading
- Frequently Asked Questions
- Conclusion
Understanding Bump Head Weed Eaters
How Tap & Go Works
A bump head contains a spool of nylon line wound around a central hub. When the rotating head contacts the ground, a spring‑loaded mechanism releases a small length of line. The centrifugal force of the spinning head then pulls the line outward, extending the cutting edge. This self‑feeding action eliminates the need to stop the engine and manually pull line, making it ideal for large areas where continuous cutting is required.
Types of Bump Heads
There are three common designs you’ll encounter:
- Single‑line bump head – Holds one strand of line; simpler to load but may require more frequent taps.
- Dual‑line bump head – Holds two strands wound in opposite directions; provides a wider cutting swath and smoother feed.
- Quick‑load (tool‑less) bump head – Features a hinged cover or snap‑in spool that lets you replace line without disassembling the head.
Identifying which type you have is the first step toward a successful reload.
Tools and Materials Needed
Before you begin, gather the following items. Having everything at hand prevents interruptions and ensures a clean, safe reload.
- Replacement trimmer line (match the diameter recommended by the manufacturer, typically 0.080‑0.105 in.)
- Protective gloves (cut‑resistant preferred)
- Safety glasses or goggles
- Flat‑head screwdriver or Torx driver (if your head uses screws)
- Small adjustable wrench (for models with a retaining nut)
- Clean rag or shop towel
- Owner’s manual (for model‑specific diagrams)
If you own a quick‑load head, you may only need the line and gloves.
Safety Precautions
Trimmer line spins at high speed and can cause serious injury. Observe these precautions every time you service the head:
- Turn off the engine and disconnect the spark plug wire (or remove the battery on cordless models) to prevent accidental starts.
- Allow the head to cool if the trimmer has been running; hot components can burn skin.
- Wear eye protection – line fragments can fly outward during removal or installation.
- Secure the trimmer on a stable workbench or the ground with the cutting head facing up.
- Keep fingers clear of the spool hub while winding; the spring tension can snap fingers.
Following these steps reduces risk and makes the reload process smoother.
Step‑by‑Step: How to Load a Bump Head Weed Eater
The following generic procedure applies to most bump heads. Always consult your manual for model‑specific nuances.
- Remove the head cover. Unscrew the retaining knob, flip the latch, or release the quick‑load clips. Set the cover aside.
- Take out the empty spool. Pull the spool straight out of the hub. Note the direction the line exits the spool (usually indicated by an arrow).
- Clean the hub and spool. Wipe away grass clippings, dirt, and old line fragments with a rag. Debris can jam the feed mechanism.
- Cut the new line to length. Most manufacturers recommend 10‑15 ft (3‑4.5 m) per strand. Measure and cut with sharp scissors or a utility knife.
- Insert the line into the spool. Find the anchor hole or slot on the spool. Thread one end of the line through, leaving a short tail (about 1 in.) to hold.
- Wind the line evenly. Turn the spool in the direction indicated by the arrow (usually clockwise). Keep tension consistent; avoid overlapping or crossing strands.
- Leave the proper tail length. Stop winding when the spool is full but not bulging. Leave 4‑6 in. of line protruding from the exit eyelets.
- Reinstall the spool. Align the spool’s notches with the hub’s tabs, then press it firmly into place.
- Thread the line through the eyelets. Pull each tail through the corresponding exit hole on the head housing.
- Replace the cover. Secure the retaining knob, latch, or clips. Ensure the cover sits flush to prevent vibration.
- Reconnect power and test. Reattach the spark plug wire or battery, start the trimmer, and tap the head gently on grass. The line should feed automatically.
If the line does not feed, double‑check winding direction and tail length.
Detailed Walkthrough for Common Models
Model A – Stihl FS 55 (Dual‑Line Quick‑Load)
Stihl’s quick‑load head uses a hinged cover that snaps open. After removing the cover, the spool lifts out without tools. The spool has two separate winding chambers labeled “L” and “R.” Wind each chamber independently, following the arrows molded into the plastic. Because the chambers are side‑by‑side, keep the line tails separated to avoid tangling. Once both chambers are wound, snap the spool back, thread the tails through the dual eyelets, and close the cover. A single tap on the ground should release both lines simultaneously.
Model B – Echo SRM‑225 (Single‑Line Screw‑On)
Echo’s bump head is secured with a central retaining nut. Use a 13 mm wrench to loosen the nut counter‑clockwise. The spool slides off the hub; note the small metal tab that engages the spring. Wind the line in the direction of the arrow (usually clockwise) and keep the line tight against the spool wall. After winding, re‑insert the spool, align the tab with the hub slot, and tighten the nut securely. Pull the line through the single eyelet, replace the outer cover, and you’re ready to trim.
Comparison Table: Bump Head vs. Fixed Line vs. Automatic Feed
| Feature | Bump Head (Tap & Go) | Fixed‑Line Head | Automatic Feed Head |
|---|---|---|---|
| Line Replacement Frequency | Low – line feeds on demand | High – manual reload each time line breaks | Medium – motor‑driven feed, occasional jam |
| Ease of Reload | Moderate – requires winding | Simple – just thread new line | Complex – often needs disassembly |
| Cutting Consistency | Good – consistent length after each tap | Variable – depends on user timing | Excellent – constant length maintained |
| Durability | High – fewer moving parts | High – simplest mechanism | Lower – more internal gears |
| Best Use Case | Large lawns, heavy brush | Light trimming, edging | Professional crews, continuous operation |
Tips and Best Practices
- Use the correct line diameter. Too thick a line stalls the motor; too thin wears quickly.
- Wind with consistent tension. Loose winding causes line to bunch and jam.
- Pre‑cut line to the same length each time. This builds muscle memory and reduces waste.
- Store spare line in a dry, UV‑protected container. Sunlight degrades nylon, making it brittle.
- Tap on grass, not concrete. Hard surfaces can damage the head and cause premature line breakage.
- Inspect the spring and pawl annually. Worn springs lead to inconsistent feed.
- Label spools if you own multiple trimmers. Prevents accidental mismatch of line size.
Common Mistakes and How to Avoid Them
- Winding the line in the wrong direction. The spool arrow indicates the feed direction; reversing it prevents line release. Fix: Always verify the arrow before winding.
- Overfilling the spool. Excess line creates bulges that bind against the housing. Fix: Stop winding when the spool is flush with the outer rim.
- Leaving tails too short. Short tails may not reach the eyelets, causing the head to run dry. Fix: Leave at least 4 in. of tail after winding.
- Forgetting to clean the hub. Debris can lock the spool or damage the spring. Fix: Wipe the hub each reload.
- Using mismatched line types. Mixing round and twisted line changes feed dynamics. Fix: Stick to one line profile per spool.
Maintenance After Reloading
After a successful reload, a few quick checks keep the trimmer running at peak performance:
- Run the trimmer at low speed for 30 seconds; listen for unusual rattling that indicates a mis‑seated spool.
- Tap the head on a patch of grass several times; verify that line extends evenly on both sides (for dual‑line heads).
- Inspect the head cover for cracks; replace if any fissures appear.
- Lubricate the hub’s spring pivot point with a light machine oil once per season.
- Record the date and line length used in a maintenance log; this helps predict when the next reload will be needed.
Frequently Asked Questions
How often should I reload the bump head?
Reload frequency depends on line diameter, cutting conditions, and area size. For typical residential use with 0.095 in. line, expect to reload every 30‑45 minutes of continuous trimming. Heavy brush or rocky terrain will shorten that interval.
Can I use any brand of trimmer line?
Most brands are interchangeable as long as the diameter matches the manufacturer’s specification. However, premium lines with reinforced cores or aerodynamic profiles can improve feed reliability and cutting life.
Why does the line keep breaking near the eyelet?
Breakage at the eyelet usually signals a sharp edge or burr on the exit hole. Inspect the eyelet for damage and smooth it with fine sandpaper. Also ensure the line is not being pinched by the cover when reassembled.
Is it okay to tap the head on concrete to feed line?
Tapping on concrete accelerates wear on the bump knob and can crack the head housing. Use a grassy area or a dedicated rubber bump pad instead.
How do I know if my head is dual‑line or single‑line?
Check the spool: dual‑line heads have two separate winding chambers or two exit eyelets on the housing. The owner’s manual will also list the configuration.
Conclusion
Mastering how to load a bump head weed eater saves time, reduces frustration, and keeps your trimmer performing like new. By understanding the tap‑and‑go mechanism, gathering the right tools, following a consistent step‑by‑step process, and avoiding common pitfalls, you’ll achieve reliable line feed every time. Regular maintenance—cleaning the hub, inspecting the spring, and using quality line—extends the life of both the head and the engine. Keep this guide handy, refer to the comparison table when evaluating upgrades, and you’ll spend less time fiddling with line and more time enjoying a clean, well‑trimmed landscape.