Introduction
Learning how to put Stihl weed eater string on correctly is essential for anyone who wants a clean cut and a long‑lasting trimmer head. Whether you are a homeowner tackling a weekend yard project or a professional landscaper who reloads line dozens of times a day, the process is straightforward once you understand the mechanics of the Stihl trimmer head. This guide walks you through every detail, from identifying the type of head on your model to loading the line like a pro, and it includes tips, common pitfalls, and a comparison of the most popular Stihl trim lines so you can choose the best option for your work.
- Understanding Your Stihl Trimmer Head
- Tools and Materials Needed
- Safety Precautions
- Step‑by‑Step Guide: How to Put Stihl Weed Eater String on
- Pro Tips for Faster Reloading
- Common Mistakes and How to Avoid Them
- Comparison Table: Stihl Trim Line Types
- Maintenance Tips for Longevity
- Troubleshooting Common Issues
- Frequently Asked Questions
- Conclusion
Understanding Your Stihl Trimmer Head
Stihl produces several trimmer head designs, and the loading method varies slightly between them. The most common heads are the AutoCut, the FixCut, and the manual bump‑feed head. Knowing which head you have prevents frustration and ensures you follow the correct loading procedure.
Types of Heads
AutoCut heads feature a spring‑loaded spool that automatically feeds line when you tap the head on the ground. They are popular on residential models such as the FS 56 and FS 70. FixCut heads use a fixed‑length line that you replace by removing the entire spool; they are often found on professional units like the FS 131. Bump‑feed heads require you to manually bump the head to advance line, and they are typical on older or budget‑friendly models.
Compatibility
Always verify the line diameter recommended for your specific head. Most Stihl heads accept 0.080‑inch (2.0 mm) or 0.095‑inch (2.4 mm) line, but some professional heads can handle up to 0.105‑inch (2.7 mm). Using the wrong diameter can cause jamming, excessive wear, or even damage to the drive shaft. Check the owner’s manual or the stamped specifications on the head housing before purchasing line.
Tools and Materials Needed
Gather the following items before you begin. Having everything at hand reduces downtime and prevents the temptation to improvise with unsuitable tools.
- Replacement trim line (correct diameter and length)
- Clean rag or shop towel
- Small flat‑head screwdriver (for heads with a retaining screw)
- Gloves (optional but recommended for grip and protection)
- Safety glasses
If you are working on a FixCut head, you may also need a pair of needle‑nose pliers to pull the old spool out of the housing.
Safety Precautions
Before touching the trimmer, make sure the engine is completely off and the spark plug wire is disconnected. This eliminates any chance of accidental start‑up while your hands are near the cutting head. Wear safety glasses to protect your eyes from stray line fragments, and consider gloves to avoid cuts from the sharp edges of the line. Keep the work area clear of bystanders, especially children and pets.
Step‑by‑Step Guide: How to Put Stihl Weed Eater String on
The following ordered list covers the complete loading process for the most common AutoCut head. If you have a FixCut or bump‑feed head, the principles are the same; only the spool removal step differs slightly. (See Also:How To Reload A Craftsman Weed Eater)
Step 1: Remove the Spool
Locate the release button or tab on the side of the head. Press it firmly while pulling the spool straight out. On some models you may need to unscrew a small retaining screw with a flat‑head screwdriver before the spool will slide free. Set the spool on a clean surface.
Step 2: Clean the Head
Use a rag to wipe away grass clippings, dirt, and old line residue from the head housing and the spool interior. Debris can interfere with smooth line feeding and cause premature wear. Inspect the spring and the eyelets for damage; replace the head if you see cracks or excessive corrosion.
Step 3: Measure and Cut Line
Pull the new line from the spool and measure a length roughly twice the circumference of the spool. For a typical 0.095‑inch line on a 10‑inch spool, cut about 20 feet (6 m). Cutting a little extra gives you margin for error and makes the next step easier.
Step 4: Load the Line
- Find the anchor hole on the spool. Insert one end of the line into the hole and pull it through until the two ends are even.
- Wind the line onto the spool in the direction indicated by the arrow molded into the spool body. Keep tension steady so the line lays flat and does not overlap.
- Leave about 6 inches (15 cm) of line protruding from each side of the spool. These tails will feed through the eyelets when the head is reassembled.
- Secure the ends in the spool’s notches or clips, if present, to prevent them from unwinding during re‑installation.
Step 5: Reassemble
Align the spool with the head housing, ensuring the protruding tails line up with the eyelets. Push the spool back into place until you hear a click or feel the retaining tab engage. If your model uses a retaining screw, tighten it just enough to hold the spool securely—over‑tightening can strip the threads.
Step 6: Test the Feed
Reconnect the spark plug wire, start the engine, and let it idle. Lightly tap the head on the ground (for AutoCut) or pull the trigger (for bump‑feed) to advance line. The line should extend evenly from both sides. If one side feeds more than the other, remove the spool and re‑wind with more even tension.
Pro Tips for Faster Reloading
Experienced users develop a rhythm that cuts reload time in half. First, keep a pre‑cut length of line in a zip‑lock bag attached to your tool belt; you’ll never have to measure on the spot. Second, wind the line onto the spool while the spool is still in the head—some AutoCut models allow you to feed line through the eyelets without fully removing the spool. Third, use a line‑winding tool or a simple drill with a spool adapter for bulk loading; this is especially handy for crews that go through several spools a day. Finally, label your line bags with diameter and length so you never accidentally grab the wrong size.
Common Mistakes and How to Avoid Them
One frequent error is winding the line in the wrong direction. The arrow on the spool indicates the correct winding direction; reversing it causes the line to bind and the feed mechanism to fail. Another mistake is cutting the line too short, which leaves insufficient tail to reach the eyelets and results in uneven feeding. Over‑filling the spool is also common; excess line creates bulk that prevents the spool from seating properly and can jam the head. Lastly, neglecting to clean the head before reloading allows grass buildup to act like sandpaper, wearing the line and the eyelets prematurely. Avoid these pitfalls by following the step‑by‑step guide precisely and performing a quick visual inspection each time. (See Also:How To Change Spool On Dewalt Weed Eater)
Comparison Table: Stihl Trim Line Types
| Line Type | Diameter | Best For | Durability | Price Range (per 50 ft) |
|---|---|---|---|---|
| Stihl .080″ Round | 0.080 in (2.0 mm) | Light residential trimming, fine grass | Moderate | $12‑$15 |
| Stihl .095″ Round | 0.095 in (2.4 mm) | General purpose, mixed grass and weeds | High | $14‑$18 |
| Stihl .105″ Round | 0.105 in (2.7 mm) | Heavy‑duty commercial, thick brush | Very High | $18‑$22 |
| Stihl .095″ Square | 0.095 in (2.4 mm) | Aggressive cutting, dense weeds | High | $16‑$20 |
| Stihl .080″ Twisted | 0.080 in (2.0 mm) | Reduced vibration, longer life | High | $15‑$19 |
Maintenance Tips for Longevity
Regular maintenance extends the life of both the trimmer head and the line. After each use, blow out grass clippings from the head with compressed air or a brush. Periodically lubricate the spool spring with a light machine oil to keep the feed action smooth. Inspect the eyelets for sharp edges; file them down gently if they become burred. Store the trimmer in a dry place, and keep spare line in its original packaging to avoid moisture absorption, which can make the line brittle. Replace the entire head assembly if you notice cracks in the housing or if the feed mechanism becomes unreliable despite proper cleaning.
Troubleshooting Common Issues
If the line refuses to feed, first verify that the spool is seated correctly and that the line tails are long enough to reach the eyelets. A jammed spool often results from line overlapping during winding; unwind and rewind with consistent tension. Uneven line length on the two sides usually means the line was not centered in the anchor hole; re‑center and re‑wind. Excessive line breakage can indicate that the line diameter is too small for the workload or that the head is striking hard objects like rocks; consider upgrading to a thicker or square‑profile line. If the engine stalls when the head engages, check for a clogged air filter or a fouled spark plug, as these are unrelated to the line but often mistaken for feeding problems.
Frequently Asked Questions
What line size should I use for my Stihl trimmer?
Consult the owner’s manual or the specification stamped on the trimmer head. Most residential Stihl models use 0.080‑inch or 0.095‑inch round line, while professional units may accept up to 0.105‑inch. Using the recommended diameter ensures proper feed and prevents damage.
How often should I replace the trim line?
Replace the line whenever it wears down to less than half its original diameter, becomes frayed, or breaks frequently during normal use. For heavy commercial work, this may be daily; for occasional home use, a spool can last several months.
Can I use non‑Stihl line in my Stihl trimmer?
Yes, as long as the line matches the required diameter and profile (round, square, twisted). However, Stihl‑branded line is engineered to work optimally with Stihl heads, offering consistent feed and durability. Cheaper generic line may have inconsistent thickness, leading to jams. (See Also:Why Will My Weed Eater Not Stay Running)
Why does my trim line keep breaking?
Frequent breakage is usually caused by hitting hard objects (rocks, curbs), using a line that is too thin for the vegetation, or a damaged eyelet that cuts the line. Inspect the head for sharp edges, upgrade to a thicker or square line for tough jobs, and avoid forcing the trimmer into immovable obstacles.
Conclusion
Mastering how to put Stihl weed eater string on is a skill that pays off every time you fire up the trimmer. By identifying your head type, using the correct line diameter, and following the step‑by‑step loading procedure, you’ll achieve reliable feed, clean cuts, and longer line life. Remember the pro tips for speed, avoid the common mistakes outlined above, and keep your head clean and lubricated for peak performance. With the right line choice—guided by the comparison table—and regular maintenance, your Stihl trimmer will stay ready for any yard challenge season after season.