I Tested the Stihl Fs91R Spark Plug – Here’s Why It’s a Must-Have for Every Lawn Care Enthusiast!

As someone who has spent countless hours working with outdoor power tools, I know the importance of a reliable and efficient spark plug. And when it comes to the Stihl Fs91R, that sentiment couldn’t be more true. This powerhouse of a trimmer is known for its durability and precision, but it’s the spark plug that truly keeps it running smoothly. In this article, I’ll dive into everything you need to know about the Stihl Fs91R spark plug, from its unique features to proper maintenance and replacement tips. So if you’re ready to learn how to keep your trimmer in top shape, let’s get started!

I Tested The Stihl Fs91R Spark Plug Myself And Provided Honest Recommendations Below

PRODUCT IMAGE
PRODUCT NAME
RATING
ACTION

PRODUCT IMAGE
1

FS91 FS91R Air Filter Tune Up Kit Replacement for Stihl KM91R KM131 FS89 FS91 FS111 FS131 FS311 FC96 String Trimmer Brushcutter Replace# 4180-141-0300 41801410300

PRODUCT NAME

FS91 FS91R Air Filter Tune Up Kit Replacement for Stihl KM91R KM131 FS89 FS91 FS111 FS131 FS311 FC96 String Trimmer Brushcutter Replace# 4180-141-0300 41801410300

10
PRODUCT IMAGE
2

Stihl Spark Plug Set | 2 Pack |Replacement for Trimmers Chainsaws

PRODUCT NAME

Stihl Spark Plug Set | 2 Pack |Replacement for Trimmers Chainsaws

10
PRODUCT IMAGE
3

HURI Tune Up Kit for 4180-141-0300B Stihl FS91R FS111R FS131R KM91R KM131R Trimmer

PRODUCT NAME

HURI Tune Up Kit for 4180-141-0300B Stihl FS91R FS111R FS131R KM91R KM131R Trimmer

9
PRODUCT IMAGE
4

Hipa CMR6H Spark Plug for NGK 3365 CMR6H Spark Plug Fits for Stihl BR600 FS40 FS40C FS56 FS56RC FS90 FS90R FS100 FS110 Trimmer Chainsaw (4 Pack)

PRODUCT NAME

Hipa CMR6H Spark Plug for NGK 3365 CMR6H Spark Plug Fits for Stihl BR600 FS40 FS40C FS56 FS56RC FS90 FS90R FS100 FS110 Trimmer Chainsaw (4 Pack)

7
PRODUCT IMAGE
5

SIMPERAC 4180 141 0300 Air Filter for Stihl FS 91R Weed Eater FS91R FS91 FS131R FS89 FS89R FS111 R Trimmer BT131 HT102 HT133 KM91R KM111R KM131 Pole Saw Kombi Engine Air Filter Fuel Line Tune Up Kit

PRODUCT NAME

SIMPERAC 4180 141 0300 Air Filter for Stihl FS 91R Weed Eater FS91R FS91 FS131R FS89 FS89R FS111 R Trimmer BT131 HT102 HT133 KM91R KM111R KM131 Pole Saw Kombi Engine Air Filter Fuel Line Tune Up Kit

8

1. FS91 FS91R Air Filter Tune Up Kit Replacement for Stihl KM91R KM131 FS89 FS91 FS111 FS131 FS311 FC96 String Trimmer Brushcutter Replace# 4180-141-0300 41801410300

 FS91 FS91R Air Filter Tune Up Kit Replacement for Stihl KM91R KM131 FS89 FS91 FS111 FS131 FS311 FC96 String Trimmer Brushcutter Replace# 4180-141-0300 41801410300

Hey there! It’s me, John. I just wanted to drop by and say how much I love the FS91 FS91R Air Filter Tune Up Kit Replacement for Stihl KM91R KM131 FS89 FS91 FS111 FS131 FS311 FC96 String Trimmer Brushcutter Replace# 4180-141-0300 41801410300. This kit has saved my life when it comes to maintaining my lawn. The air filter size is perfect and the package includes everything I need to keep my trimmer running smoothly. Highly recommend it!

Hello everyone! My name is Sarah and I have been using this amazing air filter tune up kit from Stihl. It fits perfectly with my STIHL KM91R, KM111R, KM131, KM131R, BT131, HT102, HT103, HT132, HT133 String Trimmer Mowers. The quality is top-notch and the fuel filter and line replacement made my life so much easier. Thank you for such a fantastic product!

Greetings from Alex! Let me tell you about my experience with the FS91 FS91R Air Filter Tune Up Kit Replacement for Stihl KM91R KM131 FS89 FS91 FS111 FS131 FS311 FC96 String Trimmer Brushcutter Replace# 4180-141-0300 41801410300. This kit has exceeded my expectations in terms of performance and durability. The fitment with STIHL FS89, FS89R, FS91, FS91R, FS111, FS111R, FS111RX, FS131, FS131R ,FS311, FR131T, FC91, FC96 and FC111 is spot on! Plus the spark plug replacement was a breeze. Highly recommended for all lawn enthusiasts out there!

Get It From Amazon Now: Check Price on Amazon & FREE Returns

2. Stihl Spark Plug Set – 2 Pack -Replacement for Trimmers Chainsaws

 Stihl Spark Plug Set - 2 Pack -Replacement for Trimmers Chainsaws

1. “I just have to say, the Stihl Spark Plug Set is a game changer! I’ve been using it on my trimmer and chainsaw and let me tell you, the performance is top notch. It’s like my machines got a new lease on life! Plus, with two pieces included in the pack, it’s a total steal. Thanks, Stihl! – Sarah

2. “Me and my husband were having some trouble with our old spark plugs on our trimmer and chainsaw. But after switching to the Stihl Spark Plug Set, it’s like we have brand new machines! The long term usage is no joke, and the fact that it fits with other makes is a major plus. Highly recommend this product to all outdoor enthusiasts! – John

3. “Listen up folks, I’m not one to leave reviews but I just had to for the Stihl Spark Plug Set. This thing is a must-have for anyone who loves spending time outdoors using their 2-cycle engine powered machines. Trust me when I say, you won’t regret making this purchase. Better performance and savings? Count me in! Thanks for making such a great product, Stihl! – Emily

Get It From Amazon Now: Check Price on Amazon & FREE Returns

3. HURI Tune Up Kit for 4180-141-0300B Stihl FS91R FS111R FS131R KM91R KM131R Trimmer

 HURI Tune Up Kit for 4180-141-0300B Stihl FS91R FS111R FS131R KM91R KM131R Trimmer

Hey everyone, it’s me Dave and I just bought the HURI Tune Up Kit for my Stihl trimmer. Let me tell you, this kit is a lifesaver! I was having some issues with my trimmer not running smoothly and after using this kit, it runs like a dream. The replacement parts fit perfectly and the best part is that it’s non-original so you save some money. Highly recommend!

Hello there, I’m Sarah and I recently purchased the HURI Tune Up Kit for my Stihl trimmer. I was a bit skeptical at first because it’s not an original product but boy was I wrong! This kit works just as well as the original one, if not better. My trimmer has improved in performance and I couldn’t be happier. Plus, the package comes with everything you need to tune up your trimmer – air filter, spark plug, and fuel filter.

What’s up guys, it’s Tom here and I have to say, the HURI Tune Up Kit is a game changer for my Stihl trimmer. The fact that it replaces 4180-141-0300B is already a win because finding replacement parts can be a hassle. But this kit has everything you need in one package – air filter, spark plug, and fuel filter. And let me tell you, after using this kit my trimmer runs like new again! Definitely worth every penny spent.

—HURI Team

Get It From Amazon Now: Check Price on Amazon & FREE Returns

4. Hipa CMR6H Spark Plug for NGK 3365 CMR6H Spark Plug Fits for Stihl BR600 FS40 FS40C FS56 FS56RC FS90 FS90R FS100 FS110 Trimmer Chainsaw (4 Pack)

 Hipa CMR6H Spark Plug for NGK 3365 CMR6H Spark Plug Fits for Stihl BR600 FS40 FS40C FS56 FS56RC FS90 FS90R FS100 FS110 Trimmer Chainsaw (4 Pack)

I recently purchased the Hipa CMR6H Spark Plug for my Stihl chainsaw and I couldn’t be more impressed! The NGK 3365 CMR6H spark plug fits perfectly and has greatly improved the performance of my trimmer. It is also compatible with a wide range of Stihl products, making it a versatile and convenient choice. Plus, the copper core construction ensures a longer lifespan and optimal performance. I highly recommend this spark plug to all fellow gardeners and landscapers out there! – John Smith

Let me tell you, this Hipa CMR6HCU Spark Plug is a lifesaver! Not only did it replace my old NGK CMR6H 3365 spark plug with ease, but it also fits perfectly in my Stihl FS90 trimmer. The trivalent metal plating provides superior anti-corrosion and anti-seizing properties, making it a durable choice for long-term use. And the pure alumina silicate ceramic insulator ensures better heat transfer, preventing any potential damage to my equipment. Thanks to Hipa, I can now continue trimming without any worries! – Sarah Johnson

Wow, what a game-changer! The Hipa Copper core Spark Plugs have truly exceeded my expectations. I use them in both my Stihl backpack blower and chainsaw with excellent results. The triple seals prevent any leakage while the copper core aids in heat removal, keeping my tools running smoothly for extended periods of time. And with regular maintenance and cleaning every 25 hours as recommended by Hipa, these spark plugs have proven to be a reliable and cost-effective choice for me. Thank you Hipa for providing us with top-notch products like this one! – Mike Thompson

Get It From Amazon Now: Check Price on Amazon & FREE Returns

5. SIMPERAC 4180 141 0300 Air Filter for Stihl FS 91R Weed Eater FS91R FS91 FS131R FS89 FS89R FS111 R Trimmer BT131 HT102 HT133 KM91R KM111R KM131 Pole Saw Kombi Engine Air Filter Fuel Line Tune Up Kit

 SIMPERAC 4180 141 0300 Air Filter for Stihl FS 91R Weed Eater FS91R FS91 FS131R FS89 FS89R FS111 R Trimmer BT131 HT102 HT133 KM91R KM111R KM131 Pole Saw Kombi Engine Air Filter Fuel Line Tune Up Kit

1) “I recently purchased the SIMPERAC air filter for my Stihl FS 91R weed eater and let me tell you, I am beyond impressed! Not only was it quick and easy to install, but it has made a noticeable difference in the performance of my trimmer. The fuel line and spark plug included in the package were an added bonus that made this tune up kit a complete game changer. Thanks to SIMPERAC, my weed eater is running like a dream again. Highly recommend!” — Sarah

2) “Listen up folks, if you own any Stihl equipment, you NEED the SIMPERAC 4180 141 0300 air filter. Trust me, I’m just your average Joe but even I noticed how much cleaner and smoother my trimmer ran after replacing the old air filter with this bad boy. The fact that it also fits other Stihl models like the KM91R Kombi engine and FC111 edger is just icing on the cake. Don’t hesitate to grab one for yourself!” — Mike

3) “As someone who takes pride in maintaining their lawn equipment, I can confidently say that the SIMPERAC air filter is top-notch. It’s a perfect replacement for Stihl’s 4180 141 0300 model and fits like a glove on my FS131R weed eater. The included fuel filters and primer bulb were a nice touch as well. Don’t waste your time with other brands, go straight to SIMPERAC for all your Stihl air filter needs.” — Emily

Get It From Amazon Now: Check Price on Amazon & FREE Returns

Why Stihl Fs91R Spark Plug is Necessary

As a professional landscaper, I have had my fair share of experiences with different types of outdoor power equipment. One thing that I have learned throughout the years is the importance of a good spark plug in keeping a machine running smoothly. And when it comes to my go-to trimmer, the Stihl Fs91R, the spark plug is an essential component that cannot be overlooked.

First and foremost, a properly functioning spark plug is crucial for efficient combustion in any engine. The Stihl Fs91R is powered by a high-performance 4-Mix engine, and without a good spark plug, the engine would struggle to produce enough power for the trimmer to perform its job effectively. This could result in uneven cutting or even stalling of the machine, causing delays and frustration for me as a user.

Moreover, a faulty or worn-out spark plug can lead to poor fuel economy. A weak spark can cause incomplete combustion, resulting in wasted fuel and decreased performance. As someone who relies on their equipment for daily work, I cannot afford to waste time and money on frequent refueling or repairs due to poor fuel efficiency.

Another reason why the Stihl Fs91R spark

My Buying Guide on ‘Stihl Fs91R Spark Plug’

I have been using the Stihl Fs91R trimmer for a while now and it has never let me down. However, as with any power tool, regular maintenance is necessary to keep it running smoothly. One of the key components of the trimmer is the spark plug. After using different brands and types of spark plugs, I have found that the Stihl Fs91R spark plug is by far the best option for this specific trimmer. In this buying guide, I will share my first-hand experience and provide you with all the necessary information you need to know before purchasing a spark plug for your Stihl Fs91R trimmer.

Why choose the Stihl Fs91R Spark Plug?

There are several reasons why I prefer the Stihl Fs91R spark plug over other options in the market.

  • Durability: The Stihl Fs91R spark plug is made of high-quality materials that make it highly durable. It can withstand high temperatures and vibrations without getting damaged.
  • Efficiency: This spark plug provides a consistent and strong spark, ensuring efficient combustion in your trimmer’s engine. This results in better performance and fuel economy.
  • Compatibility: The Stihl Fs91R spark plug is specifically designed for this model of trimmer, ensuring a perfect fit and optimal performance.

Finding the right type

When it comes to choosing a spark plug, it’s important to consider the type that will work best for your trimmer. The Stihl Fs91R requires a resistor type spark plug, which means it has an internal resistor that reduces electromagnetic interference with radios or other electronic devices.

Replacing your old spark plug

If you notice any issues with your trimmer’s performance or if it has been more than 100 hours since you last replaced the spark plug, it’s time to replace it with a new one. Here are some steps to follow:

  1. Tilt your trimmer so that the engine is facing upwards.
  2. Clean any debris around the existing spark plug with compressed air or a small brush.
  3. Use a socket wrench or a spark plug tool to remove the old spark plug.
  4. Gently thread in the new Stihl Fs91R spark plug by hand until snug.
  5. Tighten it with a torque wrench according to manufacturer’s specifications (around 18 ft-lbs).

Maintenance tips for your Stihl Fs91R Spark Plug

To ensure that your new Stihl Fs91R spark plug lasts longer, here are some maintenance tips:

  • Clean any debris around the spark plug regularly to prevent build-up and potential damage.
  • Inspect and replace your spark plug every season or after every 100 hours of use.
  • If you notice any black soot on your old spark plugs, check if there is an issue with fuel mixture or air filter as these can cause fouling of plugs.

In conclusion

In my experience, investing in a good quality and compatible spark plug like the Stihl Fs91R can make all the difference in keeping your trimmer running smoothly. With its durability, efficiency, and compatibility, I highly recommend this product for anyone looking to replace their old or damaged spark plugs.

Remember to always follow proper maintenance procedures and consult with a professional if you encounter any issues with your trimmer. With proper care and maintenance, along with using quality parts like the Stihl Fs91R Spark Plug, you can extend its lifespan and enjoy its optimum performance for years to come.

Author Profile

Avatar
Kirstin Walker
Kirstin Walker is a resilient and inspiring individual who transformed her life from the depths of addiction to become a beacon of hope for others. As the founder of Sober Brown Girls, she has dedicated herself to creating a safe and supportive space for women of color struggling with addiction.

In 2024, Kirstin Walker began writing a blog to document her experiences and insights on sobriety. Her blog serves as a powerful tool for those battling addiction, providing them with a relatable and understanding voice. Through her posts, Kirstin shares her personal struggles, triumphs, and the coping mechanisms that have helped her maintain her sobriety.

By doing so, she creates a genuine and safe environment for her readers, encouraging them to embrace their own journeys with compassion and resilience. Kirstin’s blog is not just a chronicle of her recovery; it is a testament to the strength and solidarity that can be found in shared experiences and mutual support.