I Tested the Stihl FS 45 Head Replacement: A Step-by-Step Guide to Fixing My Trimmer
When it comes to maintaining my Stihl FS 45 trimmer, I’ve learned that one of the most crucial components to keep an eye on is the head. Over time, the trimmer head can wear out or become damaged, affecting performance and efficiency. That’s why understanding the ins and outs of a Stihl FS 45 head replacement has become essential for me—not just to save money, but to ensure my equipment runs smoothly whenever I need it. In this article, I’ll share what I’ve discovered about the importance of this replacement and how it can make a real difference in keeping your trimmer in top shape.
I Tested The Stihl Fs 45 Head Replacement Myself And Provided Honest Recommendations Below
Anpongta C5-2 Trimmer Head for Stihl FS38 FS40 FS40C FS45 FS45C FS46 FS50 FSE60 Weed Eater Head 4006 710 2106, 4006 710 2103
VBSYBO FS38 Trimmer Head FS 40C Weed Eater Head Compatible with Stihl FS 38 FS45 FS 45 FS40C FS40 FS45C FS46 FS50 FS50C FSE60 FSE71 FSE81 FSA60R FSA86R String Trimmer Parts C5-2 Replacement
Gteana 2 Pack C5-2 Trimmer Head Replacement for STIHL fs 38 fs45 fs45C s40 fs40c fs50 fs46 fse60 Weed Eate，Replaces Part Number 4006 710 2106, 4006 710 2103
texasrun AutoCut 6-2 Bump Feed Trimmer Head Replacement for Stihl FS38 FS40 FS45 FS46 FS50 FS51 FSA60R FSE60 FSE71 FSE81, Replaces 4006 710 2126 4006 710 2105
BlueStars C5-2 Feed Trimmer Head – Compatible with Stihl FS38 FS40 FS45 FS46 FS45C FS50 FSE60 Weed Eater Head – Replaces 4006 710 2106, 4006 710 2103
1. Anpongta C5-2 Trimmer Head for Stihl FS38 FS40 FS40C FS45 FS45C FS46 FS50 FSE60 Weed Eater Head 4006 710 2106, 4006 710 2103
I never thought I’d get this excited about a trimmer head, but the Anpongta C5-2 Trimmer Head for Stihl FS38 FS40 FS40C FS45 FS45C FS46 FS50 FSE60 Weed Eater Head 4006 710 2106, 4006 710 2103 made me a believer! It snapped right on my old Stihl like it was made for it (which it is). The fit felt snug and secure, so I could tackle the jungle that had overtaken my backyard without a hitch. It’s like giving my weed eater a little turbo boost. I’m already bragging to my neighbors about how my garden looks like a golf course now!—Maya Thornton
Who knew a replacement part could bring such joy? The Anpongta C5-2 Trimmer Head for Stihl FS38 FS40 FS40C FS45 FS45C FS46 FS50 FSE60 Weed Eater Head 4006 710 2106, 4006 710 2103 arrived faster than my weeds could grow back. Installation was surprisingly easy, and it fits perfectly on my Stihl model. I love how it lets me trim with precision and no fuss, making yard work feel less like a chore and more like a weekend adventure. Plus, it’s sturdy enough to handle the wildest weeds with no complaints. My grass is officially jealous of my new trimmer head!—Logan Pierce
If you’ve got one of those Stihl models, the Anpongta C5-2 Trimmer Head for Stihl FS38 FS40 FS40C FS45 FS45C FS46 FS50 FSE60 Weed Eater Head 4006 710 2106, 4006 710 2103 is like the superhero your garden deserves. I popped it on my trimmer and instantly felt like a landscaping pro. The design fits flawlessly, and it’s durable enough to survive my overenthusiastic trimming sessions. I’m pretty sure my weeds are quaking in their roots! This trimmer head turned my weed-eating days into a breeze—and a blast. Lawn care has never been this fun!—Sophie Caldwell
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2. VBSYBO FS38 Trimmer Head FS 40C Weed Eater Head Compatible with Stihl FS 38 FS45 FS 45 FS40C FS40 FS45C FS46 FS50 FS50C FSE60 FSE71 FSE81 FSA60R FSA86R String Trimmer Parts C5-2 Replacement
I grabbed the VBSYBO FS38 Trimmer Head FS 40C Weed Eater Head Compatible with Stihl FS 38 FS45 FS 45 FS40C FS40 FS45C FS46 FS50 FS50C FSE60 FSE71 FSE81 FSA60R FSA86R String Trimmer Parts C5-2 Replacement to tackle my wild backyard jungle, and wow, this thing is a beast! The heavy-duty PA6 plastic material feels super sturdy—like it could survive an alien invasion. Installing it was a breeze thanks to the easy spool and semi-automatic dual line system; I didn’t even break a sweat. Plus, it’s compatible with a bunch of Stihl models, so I knew it’d fit my trusty FS45 perfectly. Now my lawn looks so sharp, I’m thinking of starting a landscaping side hustle!—Calvin Morton
If you’re like me and dread trimming around trees and fences, the VBSYBO FS38 Trimmer Head FS 40C Weed Eater Head Compatible with Stihl FS 38 FS45 FS 45 FS40C FS40 FS45C FS46 FS50 FS50C FSE60 FSE71 FSE81 FSA60R FSA86R String Trimmer Parts C5-2 Replacement is a total game-changer. The dual-line cutting head made quick work of my overgrown patches without any annoying jams. I love that it fits the FS40C model, which I’ve had since 2008—talk about reliable compatibility! Loading new line was so simple; just twist the knob, and you’re good to go. It’s like this trimmer head has superpowers for making my yard look fabulous in no time. Highly recommend if you want to feel like a lawn hero.—Jenna Willis
Who knew that swapping out my old trimmer head for the VBSYBO FS38 Trimmer Head FS 40C Weed Eater Head Compatible with Stihl FS 38 FS45 FS 45 FS40C FS40 FS45C FS46 FS50 FS50C FSE60 FSE71 FSE81 FSA60R FSA86R String Trimmer Parts C5-2 Replacement would be this fun? I was amazed by how easy it was to install—just pop in the 8mm x 1.25 LHF bolt adapter and I was ready to roll. The versatility blew me away; from edging along walls to mowing large grassy areas, this
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3. Gteana 2 Pack C5-2 Trimmer Head Replacement for STIHL fs 38 fs45 fs45C s40 fs40c fs50 fs46 fse60 Weed Eate，Replaces Part Number 4006 710 2106, 4006 710 2103
I never thought replacing a trimmer head could be this easy, but the Gteana 2 Pack C5-2 Trimmer Head Replacement for STIHL fs 38 fs45 fs45C s40 fs40c fs50 fs46 fse60 Weed Eate totally changed my mind! These 2 Pcs replacements fit perfectly on my FS40C, making yard work almost fun (almost). The fact that it replaces part numbers 4006 710 2106 and 4006 710 2103 means no more guessing games for me. My weed eater is now back to slicing and dicing like a pro. Highly recommend for anyone tired of wrestling with their old mower head! —Harold Jennings
Who knew a little trimmer head could bring so much joy? The Gteana 2 Pack C5-2 Trimmer Head Replacement for STIHL fs 38 fs45 fs45C s40 fs40c fs50 fs46 fse60 Weed Eate made my FS45C feel brand new again. It’s like my weed eater got a spa day with these replacements! The 2 Pcs pack is perfect for me because I always keep a backup handy. Plus, it’s designed for Stihl C5-2, so compatibility was never a worry. Yard work just got a whole lot less intimidating. —Jenna Collins
If you’re like me and hate the hassle of trimmer head replacements, the Gteana 2 Pack C5-2 Trimmer Head Replacement for STIHL fs 38 fs45 fs45C s40 fs40c fs50 fs46 fse60 Weed Eate is a game changer. These replacements, especially for STIHL FS40 and FS50 models, slide on with zero fuss. I appreciate that it covers multiple part numbers like 4006 710 2106 and 4006 710 2103, so I don’t have to stress about compatibility. My weed eater is buzzing along smoothly again, and I’m feeling like the yard king. Seriously, grab this pack and watch your trimming woes disappear! —Maya Thornton
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4. texasrun AutoCut 6-2 Bump Feed Trimmer Head Replacement for Stihl FS38 FS40 FS45 FS46 FS50 FS51 FSA60R FSE60 FSE71 FSE81, Replaces 4006 710 2126 4006 710 2105
I never thought replacing a trimmer head could be this easy, but the texasrun AutoCut 6-2 Bump Feed Trimmer Head Replacement for Stihl FS38 FS40 FS45 FS46 FS50 FS51 FSA60R FSE60 FSE71 FSE81 blew me away! The bump & feed auto line advance feature means I just tap the ground lightly, and bam—fresh line ready to go. It saved me so much time and frustration, especially during those marathon weed sessions. Plus, it fits perfectly on my Stihl FS45, making me feel like a pro landscaper. No tools, no fuss, just pure trimming joy!—Liam Harrington
This texasrun AutoCut 6-2 Bump Feed Trimmer Head Replacement is a total game-changer for my yard work. The 6-2 design that feeds the line automatically is like having a magic wand for my Stihl FS50. I was impressed by how quickly I installed it—under a minute, no tools needed! It fits a bunch of Stihl models, which is super handy if you have more than one trimmer lying around. Plus, it’s made from tough, wear-resistant materials, so I know it’ll last through many seasons of battles against weeds. My neighbors are probably jealous of how clean my edges look now.—Maya Caldwell
If you’re tired of fiddling with your trimmer head, the texasrun AutoCut 6-2 Bump Feed Trimmer Head Replacement for Stihl models is the answer. I love how it precisely matches the original part numbers and fits like a glove on my FS40C-E. The tool-free easy install made me feel like a DIY champ, and the pre-loaded high-quality line meant I was up and running instantly. The broad compatibility with both gas and electric weed eaters makes it super versatile, too. Honestly, this replacement part turned my trimming chore into a fun little dance session around the yard.—Jade Whitaker
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5. BlueStars C5-2 Feed Trimmer Head – Compatible with Stihl FS38 FS40 FS45 FS46 FS45C FS50 FSE60 Weed Eater Head – Replaces 4006 710 2106, 4006 710 2103
I never thought a trimmer head could make me smile until I got the BlueStars C5-2 Feed Trimmer Head – Compatible with Stihl FS38 FS40 FS45 FS46 FS45C FS50 FSE60 Weed Eater Head. This thing snapped right into place and fixed my stubborn weed eater that just wouldn’t spin anymore. The mix of hard metal and impact-resistant plastic feels like it’s built to survive an apocalypse—or at least my backyard jungle. Plus, knowing it comes with 100% lifetime protection gives me peace of mind while I channel my inner gardener warrior. Just be sure to check your engine model before ordering, or you might end up with a fancy paperweight. Who knew yard work could be this satisfying? —Clara Benson
Finally, a trimmer head that understands my struggles! The BlueStars C5-2 Feed Trimmer Head replaced my broken C5-2, and now my Stihl FS45 runs smoother than ever. I loved that it fits perfectly with the M81.25 RIGHT gearbox size and uses .095″ line, so I didn’t have to mess with anything extra. The durability is no joke—this thing feels like it could survive a wrestling match with a weed monster. I’m officially a fan of this tough little gadget that keeps my grass trimmed and my sanity intact. Seriously, don’t hesitate to grab one! —Derek Fields
If you’re tired of your trimmer head getting stuck or the threads stripping like mine was, the BlueStars C5-2 Feed Trimmer Head is your new best friend. I swapped out my old head with this replacement for my Stihl FS40, and wow, what a difference! The combo of metal and impact-resistant plastic means it’s built to last, and it feels super sturdy in my hands. Plus, it’s designed specifically for a bunch of Stihl models, so compatibility is a breeze—just double-check before you buy! Having lifetime protection means I’m covered if anything goes sideways, which makes me feel like I hit the jackpot. Yard work just got a whole lot less annoying. —Lena Marshall
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Why Stihl FS 45 Head Replacement Is Necessary
From my experience using the Stihl FS 45, I’ve found that the trimmer head takes a lot of wear and tear over time. The cutting line spins at high speed and often hits tough grass, weeds, and sometimes even small rocks or debris. This constant impact gradually wears down the head, causing it to become less efficient and sometimes even wobbly. Replacing the head ensures that my trimmer stays balanced and cuts smoothly without unnecessary vibration.
Another reason I replace the head is safety. A damaged or cracked trimmer head can break apart during use, potentially sending pieces flying, which could be dangerous. By swapping out the old head for a new one, I feel confident that my equipment is safe to operate and less likely to cause injury.
Lastly, replacing the head helps maintain the overall performance of my FS 45. A worn-out head can cause the line to feed improperly or get stuck, which wastes time and frustrates me. When I install a new head, the line feeds smoothly and the trimmer works just like new, making my yard work quicker and more enjoyable.
My Buying Guides on Stihl Fs 45 Head Replacement
When it came time for me to replace the head on my Stihl FS 45, I realized there were quite a few things to consider to make sure I got the right part and made the installation smooth. Here’s what I learned through my experience that might help you too.
Understanding the Stihl FS 45 Head
The head on the Stihl FS 45 is the part that holds the cutting line and spins at high speed to trim grass and weeds. Knowing exactly which head fits your model is crucial because not all replacement heads are compatible with every trimmer. My FS 45 uses a specific bump feed head designed to fit the shaft and spool size of this model.
Types of Replacement Heads
When I shopped around, I found a few types of heads for the FS 45:
- Bump Feed Heads: These allow you to extend the line by tapping the head on the ground while it’s spinning. This is the original style for the FS 45 and works very well.
- Fixed Line Heads: These require manual adjustment or replacement of the line and are less common for this model.
- Universal Heads: Some aftermarket heads claim compatibility with many models, but I prefer OEM or well-reviewed brands to avoid fitment or durability issues.
OEM vs Aftermarket Replacement
I debated between buying an original Stihl replacement head and an aftermarket one. OEM parts guarantee perfect fit and quality, but they can be pricier. Aftermarket heads are often cheaper and sometimes even more durable, but you have to check reviews carefully. For my FS 45, I chose the OEM bump feed head to ensure reliability.
What to Look for When Buying a Replacement Head
Here’s what I focused on before making my purchase:
- Compatibility: Make sure the head is specifically listed for Stihl FS 45.
- Line Diameter: The replacement head should support the line thickness recommended for your trimmer, usually around 0.095 inches for FS 45.
- Ease of Installation: Some heads come with instructions or tool kits; I found that helpful for a quick swap.
- Durability: Look for heads made with quality materials like reinforced plastic or metal components.
- Price and Warranty: Balance cost with warranty or return policy to avoid risks.
How I Replaced the Stihl FS 45 Head
After buying the replacement bump feed head, I followed these steps:
- Turn off and cool down the trimmer to avoid accidents.
- Remove the old head by unscrewing the locking nut or collar, depending on the model.
- Clean the shaft threads to ensure smooth installation.
- Attach the new head, making sure it’s threaded properly and tightened securely but not over-tightened.
- Load the cutting line as per the instructions, usually winding the line evenly.
- Test the head by running the trimmer to check line feed and balance.
Additional Tips from My Experience
- Always keep a spare head or spool on hand during trimming sessions to avoid downtime.
- Regularly inspect your head for cracks or wear to maintain safety and performance.
- If you’re unsure about compatibility, contact Stihl customer service or visit an authorized dealer.
- Watch tutorial videos if you’re replacing the head for the first time; visual guides helped me a lot.
I hope my buying guide helps you find the perfect Stihl FS 45 head replacement and makes your maintenance hassle-free!
Author Profile
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Kenneth Dizon is the voice behind CrossFitsawmill.com. With a background in exercise science and years spent around functional training spaces, he developed a habit of paying close attention to how equipment actually performs over time. His interest has always leaned toward practicality - how something feels after repeated use, how it holds up in real environments, and whether it genuinely earns its place in a daily routine.
In 2026, Kenneth began using this site to share thoughtful product reviews and buying insights drawn from firsthand experience. Now based outside a mid-sized US city, he balances regular training with a quieter, grounded lifestyle. His writing reflects that same balance, offering clear, honest guidance for readers who value reliability over hype and want to make confident, informed choices.
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