Introduction
Replacing the head on your Craftsman weed eater is a straightforward maintenance task that can extend the life of your tool and keep your yard looking its best. Whether the string has worn out, the line keeps tangling, or you simply want to upgrade to a different cutting system, knowing how to replace a Craftsman weed eater head is a valuable skill for any homeowner or landscaper. This guide walks you through the entire process, from identifying the right replacement head to completing the installation with confidence.
Most Craftsman weed eaters use a bump-feed or auto-feed string system, but some models accept blade attachments or specialty heads. The exact replacement procedure varies slightly depending on your model, but the core steps remain consistent. By following this guide, you can avoid costly trips to the repair shop and handle the job yourself with basic tools and a little patience.
Table of Contents
- Tools and Supplies You Will Need
- Identifying Your Craftsman Weed Eater Model
- Types of Weed Eater Heads
- Preparation Steps Before Replacement
- Removing the Old Head
- Installing the New Head
- Stringing the Head Properly
- Testing the Installation
- Head Type Comparison
- Tips and Best Practices
- Common Mistakes to Avoid
- Troubleshooting Issues
- Maintenance Schedule
- Frequently Asked Questions
- Conclusion
Tools and Supplies You Will Need
Before beginning the replacement, gather the following items to ensure a smooth process:
- The correct replacement head for your Craftsman model
- New cutting line or string (if not included with the head)
- Flathead and Phillips head screwdrivers
- Wrench or socket set (typically 10mm, 12mm, or 14mm)
- Pliers or locking pliers
- Gloves to protect your hands
- A clean workspace or drop cloth
- The owner manual (optional but helpful)
Having everything on hand prevents unnecessary interruptions and reduces the risk of forcing components that should fit smoothly.
Identifying Your Craftsman Weed Eater Model
The first step in replacing your weed eater head is determining the exact model of your Craftsman tool. The model number is usually found on a metal plate or sticker located on the engine housing or the shaft tube. It typically begins with a series of numbers and letters, such as 316 or 350.
Once you have the model number, visit the Craftsman website or contact customer support to confirm the compatible replacement head. Using the wrong part can lead to improper fit, poor performance, or even damage to the tool. If you cannot locate the model number, take photos of the existing head and bring them to a hardware store for assistance.
Types of Weed Eater Heads
Craftsman offers several types of replacement heads, each designed for specific cutting tasks:
Bump Feed Heads
These are the most common type. You tap the head on the ground while operating the tool to release more line. They are ideal for general trimming around trees, fences, and walkways.
Auto Feed Heads
These automatically dispense line as needed without requiring a tap. They offer convenience but may require more frequent refills in heavy-duty applications.
Fixed Line Heads
These use pre-cut lengths of line that are manually replaced. They are durable and less prone to tangles but require more maintenance.
Blade Heads
Designed for thick grass, weeds, and light brush, these heads use plastic or metal blades instead of string. They are more aggressive but not suitable for delicate landscaping.
Preparation Steps Before Replacement
Safety and preparation are critical before removing the old head. Follow these steps:
- Disconnect the spark plug wire to prevent accidental starting. This is essential even if the engine is off.
- Drain excess fuel if the tank is nearly full, to reduce spillage during the process.
- Set the tool on a stable surface such as a workbench or a pair of sawhorses. Avoid working on uneven ground.
- Remove the air filter cover if it obstructs access to the head assembly.
- Inspect the existing head for wear, cracks, or damage that may have caused the need for replacement.
Proper preparation minimizes the risk of injury and makes the replacement process much easier to manage.
Removing the Old Head
Removing the old head requires careful attention to the mounting mechanism. While designs vary, most Craftsman weed eaters follow a similar process:
- Locate the head retaining bolt or nut at the center of the head. This is typically a hex or button head bolt.
- Hold the shaft or gear housing with one hand to prevent it from spinning while you loosen the bolt.
- Use the appropriate wrench or socket to turn the bolt counterclockwise and remove it. Some models may require a specialty tool or an extension for better leverage.
- Pull the old head straight off the shaft once the bolt is removed. If it is stuck, gently wiggle it back and forth while pulling upward.
- Clean the shaft and mounting area of any debris, old string fragments, or corrosion using a wire brush or cloth.
If the head does not come off easily, do not force it. Recheck the bolt removal and consult your manual for model-specific instructions.
Installing the New Head
With the old head removed and the area cleaned, you can now install the replacement head:
- Align the new head with the mounting shaft and ensure the holes or slots match the bolt pattern.
- Insert the retaining bolt through the center of the head and into the shaft. Hand-tighten it first to ensure proper alignment.
- Use the wrench to fully secure the bolt by turning it clockwise. Do not overtighten, as this can strip the threads or damage the head.
- Check that the head rotates freely after installation. If it binds or wobbles, reseat the head and retighten the bolt.
- Reconnect the spark plug wire only after the installation is complete and verified.
Ensure all components are properly seated before proceeding to the next step.
Stringing the Head Properly
If your new head does not come pre-strung, you will need to load it with fresh cutting line:
- Determine the correct line thickness for your head. Common sizes include 0.065 inch, 0.080 inch, and 0.095 inch.
- Cut a length of line appropriate for your head type. For bump-feed heads, this is typically 15 to 20 feet.
- Locate the spool or line retainer inside the head. Many heads have small holes or notches for threading.
- Thread the line through the designated entry point and wind it evenly in the direction indicated by arrows on the spool.
- Leave a tail of approximately 6 inches protruding from the head after winding.
- Snap or secure the spool cover back into place according to the manufacturer instructions.
Proper winding prevents tangles and ensures smooth line feed during operation.
Testing the Installation
After installation and stringing, perform a brief test to confirm everything works correctly:
- Reconnect the spark plug wire and ensure the area is clear of obstacles.
- Start the engine and let it idle for a moment to warm up.
- Engage the head at low speed and observe the line feed and rotation.
- Check for unusual vibrations or noises that may indicate improper installation.
- If everything operates smoothly, proceed to use the tool as normal.
If you notice any issues during testing, shut off the engine immediately and recheck the installation.
Head Type Comparison
The following table compares the main types of Craftsman weed eater heads to help you choose the right one for your needs:
| Head Type | Best For | Line Feed Mechanism | Durability | Maintenance Level |
|---|---|---|---|---|
| Bump Feed | General trimming | Manual tap on ground | Moderate | Medium |
| Auto Feed | Convenience-focused tasks | Automatic line release | Moderate | Low to Medium |
| Fixed Line | Heavy-duty trimming | Manual replacement | High | High |
| Blade Head | Thick weeds and brush | No line required | Very High | Medium |
Choosing the right head depends on your trimming frequency, the types of vegetation in your yard, and your preference for convenience versus durability.
Tips and Best Practices
Follow these tips to maximize the lifespan and performance of your weed eater head:
- Always disconnect the spark plug before beginning any maintenance work.
- Use the correct line diameter specified for your head to avoid binding or poor feed.
- Wind the line evenly to prevent tangles and uneven wear.
- Store spare line in a dry place to prevent moisture damage and brittleness.
- Check the head for wear regularly and replace it before it fails during use.
- Clean the head after each use to remove debris and prevent buildup.
- Keep the shaft threads clean to ensure smooth bolt installation and removal.
- Refer to your owner manual for model-specific instructions and torque specifications.
These practices not only improve performance but also reduce the frequency of replacements and repairs.
Common Mistakes to Avoid
Even experienced users sometimes make errors during head replacement. Here are the most common mistakes and how to avoid them:
Over-Tightening the Bolt
Turning the retaining bolt too hard can strip the threads or crack the head housing. Always tighten until snug and then give it a quarter turn more.
Using the Wrong Line Size
Line that is too thick will not feed properly, while line that is too thin will break frequently. Always match the line size to the manufacturer specifications.
Improper Winding Direction
Winding the line in the wrong direction causes it to tangle and bind. Check for directional arrows on the spool before winding.
Ignoring the Spark Plug
Failing to disconnect the spark plug wire is a serious safety hazard. Always take this step before starting any work on the tool.
Forcing Components
If parts do not fit easily, stop and recheck alignment. Forcing components can damage the head, shaft, or mounting hardware.
Skipping the Test Run
Never assume the installation is correct without testing. A brief test run can catch issues before they become problems during actual use.
Troubleshooting Issues
If you encounter problems during or after the replacement, consult the following troubleshooting guide:
Line Not Feeding Properly
This usually indicates improper winding, incorrect line size, or a clogged head. Remove the spool, rewind the line correctly, and clean any debris from the feed mechanism.
Head Vibrating Excessively
Loose mounting bolts or an unbalanced head can cause vibration. Recheck the bolt tightness and ensure the head is properly seated on the shaft.
Engine Stalling During Use
This may indicate that the head is too heavy or that there is excessive drag. Ensure the head rotates freely and that the line is not wrapped around the shaft.
Line Breaking Frequently
Frequent line breakage is often caused by using line that is too thin or by striking hard surfaces. Switch to a thicker line and adjust your trimming technique accordingly.
Maintenance Schedule
Regular maintenance ensures your weed eater head performs reliably. Here is a recommended schedule:
| Task | Frequency | Notes |
|---|---|---|
| Inspect head for wear | After every 5 uses | Look for cracks, worn line, or loose components |
| Replace cutting line | Every 2 to 4 hours of use | Depends on vegetation type and trimming intensity |
| Clean the head | After each use | Remove grass clippings and debris to prevent buildup |
| Lubricate moving parts | Annually | Apply a small amount of grease to the shaft threads |
| Replace the head entirely | Every 1 to 2 years | Or sooner if damage is severe |
Sticking to this schedule helps prevent unexpected failures and keeps your tool operating at peak performance.
Frequently Asked Questions
Can You Use Any Head on a Craftsman Weed Eater?
No, not all heads are universally compatible. You must use a head that matches your specific Craftsman model. Check the model number and consult the manufacturer or a hardware store to confirm compatibility before purchasing.
How Often Should You Replace the Cutting Line?
The frequency depends on usage and vegetation type. For light trimming, the line may last several hours. For heavy-duty work with thick weeds, you may need to replace it every few hours. Regular inspection will help you determine when replacement is needed.
Can You Convert a String Head to a Blade Head?
Some Craftsman models support both string and blade heads, but you must verify compatibility with your specific trimmer. Blade heads require more power and are not suitable for all engines. Check your manual or contact Craftsman support before making a conversion.
What Size Line Do I Need for My Weed Eater?
The correct line size is typically listed in your owner manual or on the head itself. Common sizes include 0.065 inch, 0.080 inch, and 0.095 inch. Using the wrong size can cause feeding problems or excessive wear.
Why Does My Line Keep Tangling?
Tangling usually results from improper winding, using line that is too thick, or a worn spool. Remove the line, rewind it evenly in the correct direction, and ensure the spool is clean and undamaged.
Do I Need Special Tools to Replace the Head?
In most cases, standard wrenches and screwdrivers are sufficient. However, some models may require a specialty tool to hold the shaft while removing the bolt. Having a basic toolkit on hand will cover the majority of replacement scenarios.
Can I Replace the Head Myself Without Professional Help?
Yes, replacing the head on a Craftsman weed eater is a manageable DIY task for most users. With the right tools, a clean workspace, and patience, you can complete the job in under an hour. Always follow safety precautions and refer to your manual when needed.
How Can I Tell If My Head Needs Replacement?
Signs that the head needs replacement include frequent line breakage, constant tangling, visible cracks in the housing, or the head not rotating smoothly. If cleaning and rewinding do not resolve these issues, it is time for a new head.
Where Can I Buy a Replacement Head?
Replacement heads are available at hardware stores, home improvement centers, and online retailers. For the best fit and quality, purchase directly from Craftsman or an authorized dealer using your model number.
Is Head Replacement Covered by Warranty?
Warranty coverage varies by model and the nature of the damage. Normal wear and tear, such as line breakage or spool wear, is typically not covered. However, defects in materials or workmanship may be covered. Check your warranty documentation or contact Craftsman customer service for details.
Conclusion
Replacing the head on your Craftsman weed eater is a simple yet essential maintenance task that saves money and keeps your tool performing at its best. By identifying your model, gathering the right tools, and following the step-by-step process outlined in this guide, you can complete the replacement with confidence and precision.
Remember to always disconnect the spark plug before starting, use the correct replacement parts, and test the installation before putting your tool back to work. Regular maintenance and attention to detail will extend the life of your weed eater and ensure reliable performance for years to come. Whether you are replacing a worn bump-feed head or upgrading to a more robust blade system, the knowledge of how to replace a Craftsman weed eater head is a valuable skill that every owner should possess.