A Ryobi string trimmer is a reliable tool for keeping your yard neat and well-manicured. However, over time, the trimmer head may wear out or become damaged, requiring a replacement. Replacing the trimmer head on a Ryobi weed eater is a straightforward task that you can do yourself with just a few tools. Follow this guide to swap out the old trimmer head and get back to maintaining your lawn.

❑ Tools and Materials Needed

• Replacement Ryobi trimmer head (ensure compatibility with your model)

• Adjustable wrench or socket wrench

• Screwdriver (if required)

• Gloves (if preferred)

Step 1: Turn Off the Trimmer and Disconnect Power

Before you begin, make sure your trimmer is completely powered off. If you're using a gas-powered Ryobi trimmer, disconnect the spark plug wire to prevent accidental starts. For electric or battery-powered models, remove the battery or unplug the unit.

Step 2: Remove the Old Trimmer Head

1. Secure the Trimmer Shaft: Locate the hole near the base of the trimmer head and insert a screwdriver or locking pin to prevent the shaft from rotating.

2. Unscrew the Trimmer Head: Depending on your Ryobi model, the trimmer head may unscrew by turning it counterclockwise or may have a bolt that needs to be loosened with a wrench. Check your user manual for the specific direction.

3. Remove Any Additional Components: If there is a retaining nut or bolt holding the head in place, loosen and remove it before pulling off the old trimmer head.

If you need a new trimmer head, check out the selection of Ryobi parts we have available on our site.

Step 3: Install the New Trimmer Head

1. Align the New Head: Position the new trimmer head so that it aligns with the shaft threads.

2. Thread It On: Screw the new trimmer head onto the shaft in the proper direction (usually clockwise). Hand-tighten it first, then use a wrench if necessary to ensure a snug fit.

3. Secure Any Additional Components: If your model requires a retaining nut or bolt, tighten it properly to hold the new trimmer head in place.

If you’d like a visual demonstration of how to replace the trimmer head, this video walks you through the process.

Step 4: Test the Trimmer

Once the new head is installed, reconnect the power source (reattach the spark plug wire or battery). Turn on the trimmer and let it run briefly to ensure the new head spins correctly and is securely fastened.

❑ Additional Tips

• If your Ryobi trimmer uses a bump-feed head, ensure the spool is correctly loaded with the appropriate trimmer line before installing the new head.

• Check the user manual for your specific Ryobi model, as installation steps may slightly vary.

• Regularly inspect and clean your trimmer head to extend its lifespan.

By following these steps, you can easily replace your Ryobi trimmer head and keep your lawn maintenance routine running smoothly. 

Need Ryobi trimmer parts? Head to our website to find a large selection of Ryobi parts, for all tools and products.