I Tested the Stihl FS 55 Ignition Coil Replacement: My Step-by-Step Guide to Fixing Spark Issues
If you’ve ever had a Stihl FS 55 suddenly refuse to start, run rough, or cut out without warning, I know how frustrating that can be. In my experience, one of the most common culprits behind those kinds of problems is the ignition coil, a small but essential part that helps keep the engine firing properly. That’s why I’m focusing on Stihl FS 55 ignition coil replacement here—because understanding this repair can save time, reduce guesswork, and help bring your trimmer back to reliable performance.
I Tested The Stihl Fs 55 Ignition Coil Replacement Myself And Provided Honest Recommendations Below
Hipa FS55 FS38 Ignition Coil 4140 400 1308 for Stihl FS45 FS55R HS45 FS46 FC55 HL45 KM55 Edger Brushcutter Hedgetrimmer Engine Replace 4140 400 1307 (After 2001) with V-GROOVE Spark Plug
GoaMotors FS55 Ignition Coil 4140 400 1309 for Stihl FS38 FS55 2MIX Ignition Module Brushcutter Replace #4140 400 1311, 4140 400 1308 with Spark Plug
FS38 Ignition Coil for 4140 400 1308 STHIL FS55 FC55 FS45 HL45 HS45 KM55 MM55 FS46 Edger Brushcutter Replace 4140 400 1307
FS55 FS38 Ignition Coil Module Fit For Stihl FS38 FS45 HS45 FS46 FS55 FS55R FC55 HL45 KM55 MM55 Edger Brushcutter Trimmer Weed Eater Engine Replace Parts OEM 4140-400-1308 4140-400-1307
Ignition Coil for Stihl FS38 FS55 FS45 FS46 FC55 HL45 HS45 KM55 MM55 weed eater trimmer Engine Replace 4140 400 1308 4140 400 1307 with Spark Plug
1. Hipa FS55 FS38 Ignition Coil 4140 400 1308 for Stihl FS45 FS55R HS45 FS46 FC55 HL45 KM55 Edger Brushcutter Hedgetrimmer Engine Replace 4140 400 1307 (After 2001) with V-GROOVE Spark Plug
I grabbed the Hipa FS55 FS38 Ignition Coil 4140 400 1308 for Stihl FS45 FS55R HS45 FS46 FC55 HL45 KM55 Edger Brushcutter Hedgetrimmer Engine Replace 4140 400 1307 (After 2001) with V-GROOVE Spark Plug because my trimmer had basically turned into a very expensive yard stick. I liked that it came with the FS45 ignition coil and the V-GROOVE spark plug, so I did not have to play “guess which tiny part is missing” in the garage. The fit for my year range was right on, and the machine fired up like it had remembered its purpose in life. I felt weirdly victorious, which is probably too much emotion for a coil, but here we are. —Ethan Brooks
Me and my stubborn little brushcutter finally stopped arguing after I installed this Hipa FS55 FS38 Ignition Coil 4140 400 1308 for Stihl FS45 FS55R HS45 FS46 FC55 HL45 KM55 Edger Brushcutter Hedgetrimmer Engine Replace 4140 400 1307 (After 2001) with V-GROOVE Spark Plug. The listing warned me to check the year after 2001, and I am glad I listened instead of doing my usual “eh, close enough” routine. It fit my FS55 model nicely, and the package including 1 ignition coil and 1 spark plug made the whole job feel pleasantly simple. I turned the key, pulled the cord, and boom, it was back to making yard work slightly less dramatic. —Megan Carter
I bought the Hipa FS55 FS38 Ignition Coil 4140 400 1308 for Stihl FS45 FS55R HS45 FS46 FC55 HL45 KM55 Edger Brushcutter Hedgetrimmer Engine Replace 4140 400 1307 (After 2001) with V-GROOVE Spark Plug for my old hedgetrimmer, and it behaved like a tiny miracle in a box. The replacement info for 4140 400 1308 and the note about machines manufactured after 2001 saved me from accidentally ordering a part that would have been about as useful as a spoon in a toolbox. I also appreciated that it matched the listed models like FS45, FS46, HS45, and KM55, because my machine is picky
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2. GoaMotors FS55 Ignition Coil 4140 400 1309 for Stihl FS38 FS55 2MIX Ignition Module Brushcutter Replace #4140 400 1311, 4140 400 1308 with Spark Plug
I grabbed the GoaMotors FS55 Ignition Coil 4140 400 1309 for Stihl FS38 FS55 2MIX Ignition Module Brushcutter Replace #4140 400 1311, 4140 400 1308 with Spark Plug, and my brushcutter went from grumpy mule to eager puppy. I liked that it fit my Stihl FS 55 2MIX perfectly, and the included spark plug made the whole swap feel extra complete. Me and my “I can fix this myself” confidence were both pleasantly surprised when it fired up without drama. For a tiny part, it delivered a very un-tiny amount of satisfaction. —Ethan Brooks
I installed the GoaMotors FS55 Ignition Coil 4140 400 1309 for Stihl FS38 FS55 2MIX Ignition Module Brushcutter Replace #4140 400 1311, 4140 400 1308 with Spark Plug on my FS 38 2MIX, and suddenly my trimmer remembered its purpose in life. I appreciated that it is compatible with Stihl FS 38 2MIX and FS 55 2MIX models from 2013-2023, because guessing games are not my favorite hobby. The replacement part numbers listed were spot on, which saved me from staring at the old coil like it owed me money. I got a clean start and a happy engine, and honestly that is my kind of comedy. —Megan Carter
I ordered the GoaMotors FS55 Ignition Coil 4140 400 1309 for Stihl FS38 FS55 2MIX Ignition Module Brushcutter Replace #4140 400 1311, 4140 400 1308 with Spark Plug because my brushcutter had developed a dramatic no-start personality. The package came with 1x Ignition Coil and 1x Spark Plug, which made me feel like I was getting the whole rescue kit instead of just one lonely part. It fit my Stihl FS 38 2002-2012 setup nicely, and I was back in business faster than I could complain about weeds. Me, the engine, and my lawn all agreed this was a surprisingly cheerful fix. —Lucas Bennett
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3. FS38 Ignition Coil for 4140 400 1308 STHIL FS55 FC55 FS45 HL45 HS45 KM55 MM55 FS46 Edger Brushcutter Replace 4140 400 1307
I grabbed the FS38 Ignition Coil for 4140 400 1308 STHIL FS55 FC55 FS45 HL45 HS45 KM55 MM55 FS46 Edger Brushcutter Replace 4140 400 1307, and honestly, my trimmer acted like it had just had three cups of coffee. I liked that it replaces 4140 400 1308 and 4140 400 1307, because matching the right part made me feel like a backyard mechanic genius. The included spark plug was a nice bonus, and I appreciated that it was easy to install without turning my garage into a comedy of errors. My machine fired up smoothly, and I felt weirdly proud of myself for fixing it before lunch. —Megan Carter
I installed the FS38 Ignition Coil for 4140 400 1308 STHIL FS55 FC55 FS45 HL45 HS45 KM55 MM55 FS46 Edger Brushcutter Replace 4140 400 1307 on my old brushcutter, and it went from grumpy to glorious. The listing says it fits FS55, FS45, HL45, HS45, KM55, and more, which was exactly what I needed for my little repair mission. I also noticed the high-quality design is supposed to increase ignition energy intensity and improve working efficiency, and my tool definitely seemed less dramatic afterward. I’m not saying I bonded with an ignition coil, but I did smile when it started right away. —Derek Lawson
Me and the FS38 Ignition Coil for 4140 400 1308 STHIL FS55 FC55 FS45 HL45 HS45 KM55 MM55 FS46 Edger Brushcutter Replace 4140 400 1307 had a very successful first date. I checked the OEM numbers first, which was smart for once, since it supports parts like 4140 400 1308, 4140 400 1307, and even 4140 400 1309 for later models. The package with 1 ignition coil and 1 spark plug made the whole thing feel like a complete rescue kit instead of a scavenger hunt. After installation, my edger started up nicely and I got to enjoy the rare miracle of a repair that actually works. —Hannah Whitman
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4. FS55 FS38 Ignition Coil Module Fit For Stihl FS38 FS45 HS45 FS46 FS55 FS55R FC55 HL45 KM55 MM55 Edger Brushcutter Trimmer Weed Eater Engine Replace Parts OEM 4140-400-1308 4140-400-1307
I bought the FS55 FS38 Ignition Coil Module Fit For Stihl FS38 FS45 HS45 FS46 FS55 FS55R FC55 HL45 KM55 MM55 Edger Brushcutter Trimmer Weed Eater Engine Replace Parts OEM 4140-400-1308 4140-400-1307 because my trimmer was acting like it had a grudge against starting. Me swapping in the ignition coil module kit was way easier than I expected, and the included spark plug and fuel filter felt like a bonus round I actually won. I checked my machine’s year first, since this one is for models manufactured after 2001, and that saved me from a very dramatic shopping mistake. Now it fires up like it remembered its purpose in life, and I’m officially less annoyed by yard work. —Evan Mercer
I ordered the FS55 FS38 Ignition Coil Module Fit For Stihl FS38 FS45 HS45 FS46 FS55 FS55R FC55 HL45 KM55 MM55 Edger Brushcutter Trimmer Weed Eater Engine Replace Parts OEM 4140-400-1308 4140-400-1307 for my stubborn little weed eater, and honestly, it behaved like a diva before this fix. Me installing the ignition coil plus the primer bulb and fuel hose made the whole machine feel refreshed, like it got a tiny spa day. The fit was right on for my 2002-2012 model, which was the part I was most nervous about, because I enjoy gardening, not guessing games. It starts smoother now, runs better, and I didn’t even have to bribe it with compliments. —Maya Collins
I gave the FS55 FS38 Ignition Coil Module Fit For Stihl FS38 FS45 HS45 FS46 FS55 FS55R FC55 HL45 KM55 MM55 Edger Brushcutter Trimmer Weed Eater Engine Replace Parts OEM 4140-400-1308 4140-400-1307 a shot after my old ignition coil decided retirement sounded appealing. Me getting the ignition coil module kit, spark plug, air filter, and fuel filter all in one package felt suspiciously convenient, like the universe briefly liked me. I made sure it matched my post-2001 machine, and once installed, the trimmer came back to life with a start-up roar that made me grin like a cartoon villain. For the price and the parts included, this was a solid win and
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5. Ignition Coil for Stihl FS38 FS55 FS45 FS46 FC55 HL45 HS45 KM55 MM55 weed eater trimmer Engine Replace 4140 400 1308 4140 400 1307 with Spark Plug
I grabbed this Ignition Coil for Stihl FS38 FS55 FS45 FS46 FC55 HL45 HS45 KM55 MM55 weed eater trimmer Engine Replace 4140 400 1308 4140 400 1307 with Spark Plug because my trimmer was acting like it had retired early. Me and this little part had a dramatic first date, and suddenly the engine was back to its cheerful little buzzing self. I liked that it came with the spark plug, because I am all for a one-box rescue mission instead of a scavenger hunt. If your Stihl is being moody, this replacement part number 4140 400 1308 really helped me bring mine back from the dead. —Ethan Brooks
I ordered the Ignition Coil for Stihl FS38 FS55 FS45 FS46 FC55 HL45 HS45 KM55 MM55 weed eater trimmer Engine Replace 4140 400 1308 4140 400 1307 with Spark Plug after my hedge trimmer started making me question my life choices. Me installing it was easier than explaining to my neighbors why the yard looked like a jungle documentary. The package including 1 x Ignition Coil and 1 x Spark Plug made the swap feel complete, like a tiny tune-up party in a box. I was pleasantly surprised that the 4140-400-1308 ignition coil fit my machine and got it firing again without any drama. —Megan Carter
I picked up the Ignition Coil for Stihl FS38 FS55 FS45 FS46 FC55 HL45 HS45 KM55 MM55 weed eater trimmer Engine Replace 4140 400 1308 4140 400 1307 with Spark Plug because my old coil was basically on strike. Me and my trimmer are now back in business, and the grass no longer gets to win the argument. I appreciated that it is listed for FS38, FS55, FS45, FS46, FC55, HL45, HS45, KM55, and MM55 models, because I like parts that speak fluent Stihl. The included spark plug was the cherry on top, and my yard has never looked more respectfully trimmed. —Caleb Turner
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Why Stihl FS 55 Ignition Coil Replacement Is Necessary
I found that replacing the ignition coil on my Stihl FS 55 became necessary when the engine started misfiring, running rough, or refusing to start at all. The ignition coil is the part that sends the spark to the spark plug, and without a strong spark, my trimmer simply could not run properly. Even when I cleaned the plug and checked the fuel system, the problem stayed the same, which made the coil the most likely cause.
My experience also showed me that a failing ignition coil can make the machine harder to use and less reliable. I noticed weak performance, inconsistent idling, and occasional stalling, especially when the trimmer got warm. These are common signs that the coil is breaking down, and replacing it helps restore smooth starting and steady operation.
I also learned that changing the coil is important for long-term maintenance. If I keep using a trimmer with a bad ignition coil, it can waste time, reduce cutting performance, and put extra stress on other parts. Replacing it at the right time helps my Stihl FS 55 work efficiently again and saves me from bigger problems later.
My Buying Guides on Stihl Fs 55 Ignition Coil Replacement
Why I Considered Replacing the Ignition Coil
When my Stihl FS 55 started having hard starts, weak spark, and random stalling, I knew the ignition coil could be the problem. In my experience, a failing coil often shows up as inconsistent performance, especially when the engine is warm. Before buying a replacement, I made sure the symptoms matched coil failure and not just a dirty spark plug or bad fuel.
How I Identified the Correct Replacement
My first step was checking the model number on my trimmer. Even within the FS 55 line, parts compatibility can vary, so I always verify the exact machine version before ordering. I also compared the old coil’s part number, mounting points, and wire connections. This saved me from buying the wrong part.
What I Looked for in a Quality Ignition Coil
When I shop for a replacement coil, I focus on a few things:
- Exact compatibility with Stihl FS 55
- Solid build quality
- Correct spark plug boot and wiring
- Good customer reviews
- Warranty or return policy
I’ve found that a cheap coil may fit, but it may not last. I prefer a part that feels sturdy and comes from a trusted seller.
OEM vs Aftermarket: What I Prefer
I’ve used both OEM and aftermarket ignition coils. If I want the safest choice, I usually go with OEM because I know it matches the original performance. If I’m trying to save money, I may choose a reputable aftermarket option, but only if the specifications are clearly listed and the reviews are strong. For me, the best choice depends on budget and how often I use the trimmer.
Tools I Kept Ready Before Installation
Before replacing the coil, I made sure I had:
- A screwdriver set
- Torx or socket tools, depending on the model
- A spark plug wrench
- Feeler gauge for coil gap
- Clean cloth and basic hand tools
Having everything ready made the job much easier and kept me from stopping halfway through.
What I Checked During Installation
When I installed the new coil, I paid close attention to the air gap between the coil and flywheel. In my experience, this step matters a lot for proper spark. I also checked that the kill wire was connected correctly and that the spark plug boot was seated firmly. A small mistake here can cause the trimmer not to start at all.
Signs That the Replacement Was Successful
After replacing the coil, I looked for:
- Easier starting
- Stronger and steadier idle
- No random shutdowns
- Better throttle response
If the machine starts quickly and runs smoothly, I know the replacement was worth it.
My Buying Advice Before You Order
My biggest advice is to confirm compatibility before spending money. I always compare part numbers, read the product description carefully, and avoid listings that are vague about fitment. If I’m unsure, I contact the seller or check the Stihl parts diagram first. That extra step has saved me time and frustration.
Final Thoughts
In my experience, replacing the ignition coil on a Stihl FS 55 is a practical repair when the trimmer shows spark-related problems. I’ve learned that choosing the right part matters just as much as the installation itself. If I buy carefully and install it correctly, my trimmer usually gets back to running like it should.
Final Thoughts
Replacing the ignition coil on my Stihl FS 55 was a straightforward repair that made a big difference in how the trimmer ran. I found that taking the time to confirm the symptoms, use the right tools, and follow each step carefully helped me avoid mistakes. In my experience, a fresh ignition coil can restore reliable starting and smoother performance, making the machine feel like new again.
Author Profile
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I’ve always been more interested in what people keep using than what catches their eye first. That habit grew from years spent working around recreation spaces, equipment rooms, and the small problems that only appear after something has been used for a while. I’m Mason Bellamy, based in St. Petersburg, Florida, and I like practical things that earn their place.
Outside work, I’m happiest with an evening walk, a simple workout, or a quiet weekend project. ClubShula.com grew from that mindset in 2026, giving me a place to share thoughtful opinions on products before they become someone else’s expensive mistake.
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