How to Replace Head on Craftsman Weed Eater? Craftsman Head

Introduction

Replacing the head on a Craftsman weed eater is a routine maintenance task that keeps your string trimmer operating efficiently. Over time, the cutting line inside the head wears down, tangles, or breaks, which reduces performance and makes yard work more difficult. Rather than replacing the entire tool, swapping out the head restores functionality and saves money. This guide walks you through how to replace head on Craftsman Weed Eater models, covering preparation, disassembly, installation, and testing.

Table of Contents

• Why Replace the Trimmer Head
• Tools and Materials Needed
• Identify Your Craftsman Weed Eater Model
• Types of Trimmer Heads
• Step-by-Step Replacement Process
• Removing the Old Head
• Installing the New Head
• Winding the Trimmer Line
• Reassembling the Tool
• Testing the New Head
• Head Type Comparison
• Tips and Best Practices
• Common Mistakes to Avoid
• When to Seek Professional Help
• Frequently Asked Questions
• Conclusion

Why Replace the Trimmer Head

The trimmer head houses the spinning spool that feeds the cutting line. As you use your Craftsman weed eater, the line gradually wears down from contact with concrete, brick, and thick vegetation. When the line becomes too short, it stops auto-feeding, and the trimmer loses effectiveness. Additionally, the head itself can crack or the internal mechanism can jam over time. Replacing the head restores consistent line feed and improves cutting performance.

Tools and Materials Needed

Before starting, gather these items:

• New trimmer head compatible with your Craftsman model
• Replacement trimmer line (if not included with the head)
• Flathead screwdriver or small pry tool
• Phillips head screwdriver (if required by your model)
• Garden gloves for hand protection
• Clean cloth or rag
• Optional: flasher or small container to hold screws

Identify Your Craftsman Weed Eater Model

Craftsman produces many trimmer models, and not all heads are interchangeable. Locate the model number on the engine housing or shaft of your tool. It typically appears as a series of numbers and letters. With the model number in hand, consult the owner’s manual or search online for the exact replacement head part number. Using the correct head ensures a proper fit and prevents damage to the trimmer.

Types of Trimmer Heads

Understanding the different head types helps you choose the right replacement:

• Fixed-line heads: Pre-loaded with line that cannot be rewound. Simple to install but require full replacement when line wears out.
• Bump-feed heads: Automatically release more line when tapped on the ground. Common on Craftsman models and easy to reload.
• Auto-feed heads: Use centrifugal force to extend line without tapping. Found on higher-end models.
• Multi-line heads: Hold multiple lines for thicker cutting paths. Ideal for heavy-duty trimming.

Step-by-Step Replacement Process

Follow these ordered steps to safely replace the head on your Craftsman weed eater:

1. Turn off and disconnect the tool. Remove the spark plug wire to prevent accidental starting.
2. Drain excess fuel if needed. Work in a well-ventilated area away from flames.
3. Place the trimmer on a stable surface. A workbench or sturdy table prevents movement during disassembly.
4. Remove the existing head. Refer to the next section for detailed removal steps.
5. Install the new head. Follow the instructions in the installation section below.
6. Wind and load the trimmer line. See the winding section for guidance.
7. Reassemble the tool. Reattach the bump knob, spring, and any housing components.
8. Test the new head. Start the trimmer and verify smooth operation.

Removing the Old Head

To remove the trimmer head:

1. Locate the release button or tab on the head assembly. Many Craftsman models have a small plastic button on the side of the head.
2. Press and hold the release button while turning the head counterclockwise.
3. If your model uses a locking mechanism, insert a flathead screwdriver into the slot on the shaft and hold it steady while rotating the head.
4. Once loosened, carefully lift the head off the shaft. Place it on a clean surface to avoid contamination.
5. Remove the inner spring and bump knob if they came off with the head. Keep track of all components for reassembly.

Installing the New Head

To install the replacement head:

1. Align the new head with the threaded shaft or mounting plate on the trimmer.
2. Thread the head onto the shaft by hand, turning it clockwise.
3. Continue tightening by turning the head until it seats firmly against the motor housing.
4. If the head has a locking tab, press it into place until it clicks securely.
5. Reinstall the bump knob and spring, ensuring they fit snugly within the head assembly.

Winding the Trimmer Line

Proper line winding prevents tangles and ensures smooth feeding:

1. Remove the spool from the head by pressing the release tabs on either side.
2. Determine the correct line diameter for your model, typically 0.065 to 0.080 inches.
3. Insert one end of the line into the small hole in the center of the spool.
4. Wound the line tightly in a consistent direction, following the arrows molded into the spool.
5. Fill the spool to the indicated capacity line, usually about three-quarters full.
6. Thread the free end of the line through the exit port in the head housing.
7. Reinstall the spool into the head and snap it back into place.

Reassembling the Tool

After installing the new head and winding the line:

1. Reconnect the spark plug wire.
2. Double-check that all screws and fasteners are tightened.
3. Ensure the head rotates freely without binding.
4. Inspect the area for any loose or missing parts.

Testing the New Head

Before returning to regular use:

• Start the trimmer in a safe, open area.
• Let it idle briefly to confirm the head spins smoothly.
• Gently tap the head on the ground to test line feed if it is a bump-feed model.
• Check for unusual vibrations or noise, which may indicate improper installation.

Head Type Comparison

Tips and Best Practices

• Always disconnect the spark plug before working on the trimmer to prevent accidental starts.
• Keep a small container nearby to organize screws and small parts during disassembly.
• Use the exact line diameter recommended by Craftsman to avoid feeding problems.
• Wear safety glasses when starting the trimmer after installation to protect against flying debris.
• Regularly inspect the head for cracks or wear, even after replacement, to catch issues early.
• If the line tangles frequently, check that the spool is wound evenly and not overfilled.
• Store the trimmer in a dry place when not in use to prevent rust and component degradation.

Common Mistakes to Avoid

• Using the wrong head: Installing an incompatible head can damage the shaft or motor.
• Over-tightening: Forcing the head too tightly can strip threads or crack the housing.
• Incorrect line winding: Winding in the wrong direction causes the line to tangle or jam.
• Skipping the test run: Failing to test the trimmer after installation may result in unexpected failure during use.
• Neglecting maintenance: Not cleaning the head regularly leads to debris buildup and poor performance.
• Rushing the process: Taking shortcuts increases the risk of improper assembly and future breakdowns.

When to Seek Professional Help

If you encounter stripped threads, a seized shaft, or recurring line feed problems after replacement, consider consulting a small engine repair shop. Professionals can diagnose deeper mechanical issues that may not be visible during a standard head swap. Additionally, if your Craftsman model has a proprietary head system, a technician can ensure compatibility and proper installation.

Frequently Asked Questions

Can I replace the head myself without professional help?

Yes, most Craftsman weed eater heads can be replaced at home with basic tools. Follow the step-by-step instructions in this guide and refer to your owner’s manual for model-specific details.

How often should I replace the trimmer head?

Replace the head when the line becomes too short, the spool jams frequently, or the housing cracks. For typical residential use, this happens every one to three seasons depending on frequency and conditions.

What size line does my Craftsman trimmer use?

Check your owner’s manual or the label on the existing spool. Common diameters range from 0.065 to 0.080 inches. Using the correct size prevents feeding issues and motor strain.

Do I need to replace the entire head or just the line?

If the head housing is intact, you can often just replace the line by removing the spool and rewinding. However, if the head is cracked or the feed mechanism is broken, replace the entire head assembly.

Why is my new head not spinning properly?

Improper installation is the most common cause. Ensure the head is fully seated on the shaft, the locking mechanism is engaged, and no internal components are misaligned. A quick test run will reveal any remaining issues.

Can I use a generic trimmer head on my Craftsman?

Some universal heads fit Craftsman models, but compatibility is not guaranteed. Always verify the part number or consult the manufacturer to avoid damaging your trimmer.

Conclusion

Knowing how to replace head on Craftsman Weed Eater models empowers you to maintain your tool efficiently and extend its lifespan. By identifying the correct replacement head, following a careful removal and installation process, and testing the result, you can restore your trimmer’s cutting performance without costly repairs. Remember to disconnect the spark plug, use the proper line size, and take your time during assembly. With the right approach, replacing the trimmer head becomes a straightforward task that keeps your yard looking sharp season after season.