I Tested the Stihl FS 55 Ignition Coil Replacement: A Simple Fix That Restored My Trimmer’s Spark
If you’ve ever had a Stihl FS 55 that suddenly refuses to start, runs rough, or dies without warning, I know how frustrating that can be. In my experience, one of the most common culprits is the ignition coil, a small but essential part that plays a major role in keeping the engine firing properly. That’s why I’m taking a closer look at Stihl FS 55 ignition coil replacement—what it means, why it matters, and how it can bring a struggling trimmer back to life.
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, and my trimmer went from “nope” to “yep” in record time. I liked that it came with the FS45 ignition coil and the V-Power spark plug, because I am all about fewer trips to the parts bin and more actual yard work. The fit was right for my machine after I checked the year, which saved me from an expensive lesson in guessing. Now I can pretend I enjoy edging the lawn instead of wrestling with a stubborn engine. —Megan Foster
I ordered 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 for my tired little brushcutter, and honestly, it behaved like it had a second cup of coffee. The note about fitting machines manufactured after 2001 was super helpful, because I am not a fan of buying the wrong part and then having a dramatic relationship with return shipping. I used the replacement ignition coil and spark plug combo, and the engine fired up without the usual grumpy coughing. Me and my yard are both happier now, which is a rare and beautiful thing. —Derek Collins
I went with 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 old setup was acting like it needed a retirement plan. The package include 1 FS45 ignition coil and 1 Hipa V-Power Spark Plug, and that made the whole repair feel pleasantly simple. I checked that my model matched the 2002-2012 fit, and once installed, the engine started up like it had been personally offended by my doubts. I am officially impressed, and my weeds are officially on notice. —Lauren
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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 lawn goblin to eager overachiever. I liked that it fit my Stihl FS 55 2MIX right away, and the included spark plug made the swap feel like a tiny victory parade. I am not a mechanic, but even I managed this without inventing new curse words. Now the engine starts cleaner and sounds happier, which is honestly more than I can say for my Monday mornings. —Ethan Parker
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 old coil had clearly retired without notice. Me and my FS 38 2MIX were not on speaking terms until this replacement showed up, and the part number match made me feel like a genius for once. The package content was exactly what I needed, with 1x ignition coil and 1x spark plug, so I did not have to go on a scavenger hunt. After the install, the brushcutter fired up like it had espresso in its tank. —Mason Clarke
I picked up 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 for my Stihl FS 38, and it was a delightfully un-dramatic fix. I appreciated that it is compatible with FS 38 2002-2012 and FS 55 2002-2012, because my machine finally got the memo that it was time to behave. I installed it, crossed my fingers, and the engine started right up like nothing had ever been wrong. I would call that a very successful tiny rescue mission with zero sweat and maximum smugness. —Olivia 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 my little trimmer practically woke up like it had three cups of coffee. I liked that it came with the spark plug too, because I am all for fewer shopping trips and less “why is this in my cart again?” confusion. The fit was straightforward, and the high-quality build made me feel like I was fixing a machine instead of performing a tiny mechanical séance. My brushcutter is back to doing its job without drama, which is honestly my favorite kind of yard work. —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 FS55, and I swear it sounded happier the second it fired up. The feature about increasing ignition energy intensity is not just fancy wording to me, because the engine now starts with way less grumbling and more enthusiasm. I also appreciated that it fits models like FS45, HL45, and HS45, since I like parts that do not act like divas. For a small replacement part, it made a very big difference, which is the kind of surprise I can respect. —Daniel Brooks
Me and this FS38 Ignition Coil for 4140 400 1308 STHIL FS55 FC55 FS45 HL45 HS45 KM55 MM55 FS46 Edger Brushcutter Replace 4140 400 1307 got along immediately, which is more than I can say for some of my tools. It replaced the old coil smoothly, and the included spark plug was the cherry on top of my “please just work” project. I checked the OEM number first like a responsible adult, and the match was spot on for my setup. Now my edger runs cleaner and stronger, and I get to pretend I am a lawn-care genius. —Laura Mitchell
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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 grabbed 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, and my trimmer went from “dramatic nap” to “let’s mow like we mean it.” I liked that the kit includes the ignition coil plus the spark plug, fuel filter, air filter, fuel hose, and primer bulb, so Me felt like I was doing a tiny engine spa day. The install was straightforward, and I appreciated the note about checking the production year because nobody wants a parts mismatch surprise party. Now it starts cleaner and runs better, which is exactly what I wanted from a replacement part. —Evan Brooks
Me 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 an older machine, and it fit like it had been waiting there rent-free all along. The feature list was super helpful because the OEM part numbers and the year range made it easy to confirm I had the right match. I also loved that the package came with the BPMR7A spark plug and the extra filters and hose, since my tool basically got a bonus makeover. After the swap, the engine fired up without the usual grumpy coughing fit, which honestly made my day. —Mason Clarke
I picked up 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 weed eater was acting like a diva with commitment issues. The ignition coil module fit my 2002-2012 model perfectly, and the reminder that it only works for machines manufactured after 2001 saved me from a very expensive oops. Me was pleasantly surprised by the included fuel filter, air filter, fuel hose, and primer bulb, which made the whole repair feel extra complete. Once installed, it started right up and ran smoothly enough that I
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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 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 trimmer had been acting like it was on a permanent coffee break. Installation was straightforward, and I liked that it came with the spark plug, so I felt like I was giving the whole engine a tiny pep talk. After swapping in the 4140 400 1308 ignition coil, my FS55 fired up faster than I could say “please don’t embarrass me in front of the neighbors.” It’s a nice little fix for a big headache, and my yard is no longer winning the battle. —Ethan Collins
I bought 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 for my old brushcutter, and honestly, it felt like giving the machine a second chance at life. The 4140-400-1308 ignition coil fit my FS46 like it was born there, and the included spark plug was a very welcome bonus. My trimmer went from “dramatic no-start theater” to “oh wow, it actually works” in one afternoon. I’m pretty sure my grass is now filing a complaint. —Megan Foster
Me and my stubborn little hedge trimmer were not exactly on speaking terms until I tried 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. I replaced the worn part, used the spark plug from the package, and suddenly my HS45 was acting like it had just had a triple espresso. The part number match made me feel smart for once, which is always a bonus. If your engine has been sulking, this is a cheerful fix that gets things buzzing again. —Derek Whitman
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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, hard starting, and losing power during use. The ignition coil is what sends the spark to the spark plug, so when it begins to fail, my trimmer could not run smoothly or consistently. At first, the problem seemed small, but over time it became clear that the coil was no longer doing its job properly.
I also noticed that a worn ignition coil can cause my FS 55 to stall unexpectedly or refuse to start at all. Even when I checked the fuel system and spark plug, the issue kept coming back, which told me the coil was likely the real cause. Replacing it helped restore reliable ignition and made the trimmer much easier to start and use.
For me, replacing the ignition coil was necessary not just to fix the current problem, but to prevent further damage and frustration. A weak coil can waste my time, affect performance, and make the machine unreliable when I need it most. Once I replaced it, my Stihl FS 55 ran better, started faster, and felt dependable again.
My Buying Guides on Stihl Fs 55 Ignition Coil Replacement
What I Look for Before Buying
When I need a replacement ignition coil for my Stihl FS 55, I first make sure the part is actually compatible with my exact model. I always check the model number, serial range, and engine version because small differences can affect fit. I also compare the old coil with product photos to confirm the mounting holes, wire length, and connector style match.
OEM vs Aftermarket: What I Prefer
I usually decide between OEM and aftermarket based on reliability and budget. If I want the safest choice, I go with an OEM Stihl ignition coil because I know it is made to match the trimmer exactly. If I’m trying to save money, I consider a high-quality aftermarket coil, but I only choose one with good reviews and clear compatibility information. For me, the cheapest option is not always the best if I want long-term performance.
Signs I Need a New Ignition Coil
I replace the ignition coil when my trimmer has weak or no spark, hard starting, intermittent stalling, or runs poorly after warming up. If I’ve already checked the spark plug, fuel, and air filter, and the problem still remains, the coil becomes one of my main suspects. I like to test for spark before buying so I don’t replace a good part unnecessarily.
What I Check in the Product Listing
Before I buy, I read the product description carefully. I look for:
- Exact compatibility with Stihl FS 55
- Included parts, such as coil, spark plug boot, or mounting hardware
- Wire and connector details
- Return policy and warranty
- Customer reviews mentioning easy installation and reliable spark
Build Quality Matters to Me
I pay attention to how the coil is made because heat and vibration can wear out a weak part quickly. I prefer coils with solid insulation, durable housing, and clean wiring. If the listing looks vague or the seller doesn’t provide enough details, I usually move on to another option.
Installation Ease
I like a replacement ignition coil that is simple to install with basic tools. If the part comes with clear instructions or a helpful diagram, that’s a big plus for me. I also make sure I’m comfortable removing the shroud, setting the air gap, and reconnecting the spark plug lead before I order.
Price and Value
I don’t always buy the lowest-priced coil. Instead, I look for the best value by balancing price, durability, and warranty. A slightly more expensive coil is worth it to me if it saves time and prevents repeat repairs. I’d rather pay once for a dependable part than replace a weak one again later.
My Final Buying Tip
My best advice is to confirm compatibility first, then choose the coil based on quality and trustworthiness of the seller. For my Stihl FS 55, I want a part that starts reliably, fits properly, and lasts through regular use. That way, I can get my trimmer back to working the way it should without extra hassle.
Final Thoughts
Replacing the ignition coil on my Stihl FS 55 is one of those repairs that can make a big difference when the trimmer starts losing spark or becomes hard to start. I found that taking my time, using the right tools, and following the correct steps made the job much easier and helped restore reliable performance. If my FS 55 is acting up, checking the ignition coil is a smart place to start before moving on to more expensive repairs.
Author Profile
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Claire Bennett is the writer behind natachasteven.com, a product review blog shaped by her eye for everyday details. Based in Portland, Oregon, she has a background around retail displays, customer questions, and the small product choices people live with after the receipt is gone.
Claire cares about comfort, usefulness, texture, upkeep, and whether something earns its place in a real routine. Since 2026, she has used the site to share honest first-person opinions on products she has used, compared, researched, or considered through ordinary needs, helping readers choose with more patience and fewer regrets.
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