The Basic Process for Ryobi String Replacement

Replacing the string on a Ryobi trimmer takes about five to ten minutes once you know the steps. You will need to remove the spool, wind new string onto it, and snap it back into place. The exact method depends on whether your trimmer has a fixed spool (the kind you wind by hand) or an auto-feed spool (the kind that advances string automatically as you trim).

Most Ryobi trimmers sold for home use have an auto-feed spool, which is simpler to reload than older manual-wind designs. The string itself is standard 0.080-inch or 0.095-inch diameter nylon cord, available at any hardware store or online for five to fifteen dollars per spool. You do not need Ryobi-branded string — any trimmer string of the correct diameter will work.

Before you start, unplug the trimmer if it is electric, or remove the battery if it is cordless. This prevents accidental startup while your hands are near the cutting head. Let the trimmer cool for a few minutes if you have just finished using it.

Key Takeaways

  • Ryobi auto-feed spools require you to wind string into the spool grooves, insert the end into the anchor slot, and snap the spool back onto the trimmer head.
  • Standard 0.080-inch or 0.095-inch trimmer string works in any Ryobi trimmer — you do not need to buy Ryobi-branded replacements.
  • The entire process takes five to ten minutes and requires no tools beyond your hands.
  • If the spool will not snap back into place, the string is wound too tightly or the end is not seated in the anchor slot correctly.

Removing the Spool from Your Trimmer

The spool sits inside the cutting head at the bottom of the trimmer shaft. On most Ryobi models, you remove it by twisting the spool counterclockwise by hand — no wrench needed. Grip the spool firmly and turn it until it comes free. If it is stuck, wrap a cloth around it for better grip, or tap the spool gently with a rubber mallet to loosen it.

Once the spool is loose, unscrew it the rest of the way by hand and set it on a clean surface. You will see the spool has a center post and a circular groove or channel running around the outside. This groove is where the string winds. On the side of the spool, there is usually a small slot or anchor point — this is where you will tuck the end of the new string once it is wound.

If your trimmer has a fixed spool that does not unscrew, you will wind the string directly onto the spool while it is still attached to the trimmer. The winding process is the same either way.

Winding New String onto the Spool

Cut a length of new string about 20 to 25 feet long. This gives you enough to wind onto the spool and still have a working length for trimming. If you are not sure how much you need, cut more than you think — you can always trim the excess later.

Find the anchor slot on the spool — it is usually a small notch or groove on the outer edge. Insert one end of the string into this slot and hold it there with your thumb. Now begin winding the string around the spool in the direction indicated by the arrow on the spool itself. Most Ryobi spools wind clockwise, but check the arrow to be sure.

Wind the string tightly and evenly, keeping it in the groove as you go. Do not let it bunch up or overlap itself. Wind until you have about 6 to 12 inches of string left — this becomes your cutting length. Once the spool is full, tuck the end of the string into the anchor slot to hold it in place while you reinstall the spool.

Reinstalling the Spool and Threading the String

Hold the spool with the wound string facing down and the anchor slot visible. Line up the center post of the spool with the center shaft of the trimmer head. Push the spool straight up onto the shaft until you feel it seat. Now twist the spool clockwise by hand until it is tight. You should feel resistance — do not force it, but it should be snug enough that it will not come loose during use.

Once the spool is installed, you need to thread the string ends through the eyelets or guides on the trimmer head. Most Ryobi trimmers have two small eyelets on opposite sides of the head. Pull the string out of the anchor slot and feed one end through each eyelet. The string should be taut but not so tight that it bends the eyelets.

If your trimmer has an auto-feed spool, the string will advance automatically as you trim and the ends wear down. If you have a manual-wind spool, you will need to manually advance the string by turning the spool when the ends get too short.

Adjusting String Length and Testing

Once the string is threaded, you can trim it to the correct length. Most Ryobi trimmers have a cutting guide — a small notch or blade on the side of the head that shows you where to cut. Hold the trimmer so the cutting guide is at the top, and carefully cut the string to length using scissors or a utility knife. The string should be just long enough to reach the guide without bunching.

Before you use the trimmer, plug it in or reinstall the battery and run it for a few seconds without touching anything. Listen for any unusual sounds and watch to make sure the string spins freely and does not hit the guard or housing. If the string is rubbing or making noise, stop when ready and check that the spool is seated correctly and the string is threaded through both eyelets.

Troubleshooting Common Restringing Problems

If the spool will not snap back onto the trimmer head, the most common cause is that the string is wound too tightly. Unwind a little bit and try again. Another cause is that the end of the string is not seated properly in the anchor slot — it may be sticking out and blocking the spool from seating. Make sure the end is tucked all the way into the slot.

If the string does not advance or feed during use, check that it is wound in the correct direction. Look at the arrow on the spool and make sure you wound clockwise (or counterclockwise, depending on what the arrow shows). If the string is wound backward, the auto-feed mechanism will not work.

If the string keeps breaking or shredding, you may be hitting rocks or hard objects in the grass. This is normal wear, not a problem with the restringing. However, if the string breaks when ready after you install it, check that the eyelets are not cracked or sharp — a damaged eyelet will cut the string. If an eyelet is damaged, you may need to replace the trimmer head.

Choosing the Right String for Your Ryobi Trimmer

Ryobi trimmers use standard nylon trimmer string in two common diameters: 0.080 inch and 0.095 inch. Check your trimmer manual or the spool itself to see which size your model uses. Using the wrong diameter can cause the string to wind unevenly or not feed properly.

You can buy trimmer string at any hardware store, home center, or online retailer. A single spool of string costs between five and fifteen dollars and will last through many restringing cycles. Some people buy string in bulk to save money, but nylon can degrade over time if stored in heat or sunlight, so do not buy more than you will use in a year or two.

Ryobi also sells pre-wound spools that you can snap directly onto the trimmer head without winding. These cost more per use but save time if you do not want to wind string yourself. Whether you wind your own or buy pre-wound spools is a matter of preference and budget.

Frequently Asked Questions

Can I use any brand of trimmer string in my Ryobi trimmer?

Yes. Trimmer string is a standard product, and any 0.080-inch or 0.095-inch nylon string will work in your Ryobi trimmer. You do not need to buy Ryobi-branded string. Check your manual or the spool to confirm the correct diameter for your model.

How often do I need to replace the string?

This depends on how often you use the trimmer and what you are cutting. Light residential use might require restringing every few months, while heavy use could mean restringing every few weeks. You will know it is time when the string gets too short to cut effectively or breaks during use.

What if I wind the string in the wrong direction?

If you wind the string backward, the auto-feed mechanism will not work and the string will not advance during use. Unwind the string, turn the spool around, and wind it again in the direction shown by the arrow on the spool.

Do I need to remove the spool to replace the string?

On most Ryobi trimmers, yes — the spool unscrews by hand. However, some models have a fixed spool that stays attached to the trimmer head. Check your manual to see whether your model has a removable or fixed spool. Either way, the winding process is the same.

Why does the string keep breaking right after I install it?

The most common cause is a cracked or sharp eyelet on the trimmer head. The string rubs against the damaged edge and breaks. Inspect both eyelets for cracks or rough spots. If you find damage, you may need to replace the trimmer head, as the eyelets cannot usually be repaired.