Find the Best Spark Plug for Your Stihl Chainsaw

Published on: June 2, 2022
Written by David Rowan / Fact-checked by David Rowan

The resource of an ignition mechanism is a humble Stihl chainsaw suitable spark plug, isn’t it? Well, operating a gasoline-powered chainsaw is not a big deal, but the maintenance of its fuel system, particularly, with the assistance of a spark plug is a better solution.

For general acknowledgment, a spark plug installed from the manufacturer site collaborates to ignite the double-stroke or 4-stroke engines, even sometimes empowering its HorsePower too. 

best spark plug for your stihl chainsaw

Among different chainsaw parts and functions, if your old spark plug has died out due to over applications or for not utilizing it for extended times, installing a new spark plug, particularly, the one that fits your Stihl chainsaw is a better solution. Including that you can clean or fix your fouled spark plugs too, however, you can use a carb cleaner to its hole. 

Our recommendation in multiple categories with specifications, and experienced features of spark plugs listing to select for your Stihl chainsaw and chainsaw chain is a bucks-worthy decision for you. Thus, we welcome a thorough reading which can benefit you in terms of saving time for deeper knowledge. 

What Defines a Spark Plug to Be the Best?

To maintain a compact petrol power tool or a mixture of air-fuel engines, spark plug selection can result in something better or worse. However, you can apply in wet environments, as well as other challenging environments.

In terms of delving into a versatile range of terminology in today’s market, gapping, thread size, terminals, seat, tips, type, heat-resistant and more similar and impactful features quality and range define a spark plug to the best one, especially, when it is about your Stihl chainsaw.   


What Spark Plug Does a Stihl Chainsaw Take?

Firstly, Stihl spark plugs have sealing rings in their construction. In general, such rings have been coated for corrosion-resistant performance for long-time applications and better contact. 

Secondly, electro gaps are common and optimized in Stihl chainsaws to suit the optimal compression. 

Thirdly, spark plugs that have necessary and well-tested union nuts, not only ensure no sparking gaps but also resist potential as fumes. 

Fourthly, spark plugs for your Stihl chainsaw require interference suppression resistance as it performs well to protect your machine ignition module. 

We have found such criteria while testing and installing such spark plugs for your Stihl chainsaw to not let die your bucks spend spark plugs soon. 

What Size Spark Plug Does a Stihl Chainsaw Take?

In terms of installing sparks plugs that fit your Stihl chainsaw, there is a little yet important opt-out factor that you cannot exempt. Size includes other potential factors, for instance, gap, hex size, reach, and thread size. 

The main types of chainsaw spark plugs, especially the Stihl branded ones, allow installation of 4mm, 4.8mm and approximately 5.5mm files if necessary. However, all these files are available either in round shape or in flat shape depending on the cutter. 

What Spark Plug Does a Stihl MS 250 Take?

Either in cold weather starting or in a case of precise ignition, a Stihl MS 250 accepts both replaceable NGK BPMR7A, and Bosch WSR6F. Why? In a very emergency or for a common spark plug installation, both models offer complete combustion, better emissions, faster starting as well as smoother running. 

What Spark Plug Does a Stihl 029 Chainsaw Take?

A Stihl 209 chainsaw needs equipment like a spark plug which will support the correct gap in between the center and the ground electrode, in particular, 0.02-inches. In terms of cleaning the air filter, the spark plug which has a black carbon deposit is a good supportive feature to include. But don’t forget to purchase safety equipment for your works.

Find the Best  Spark Plug for Your Stihl Chainsaw

With no ado, users can spend their bucks on a Stihl chainsaw suitable spark plug to enjoy a long-lasting no fuel sparking issues at all. 

1. NGK Spark Plug Bpmr7a for Stihl Chainsaw


Weight 1 pound
Gap .020”
thread size10mm
Tip Projected 

From 24HP Briggs and Stratton fitting performance to the highly projected Stihl chainsaw fitting, this spark plug from renowned NGK we have experienced the best one. Fortunately, we have found such a spark plug to deal with gaping around .020-inches all of a sudden. Yet this can be fixed over 10mm thread size. 

According to one of our crew members, she has a single Husqvarna 125b leaf blower and is searching for one suitable spark plug. In terms of operation, compared to the temperature of both rcj-6yand bpmr7a are not similar. However, this equipment is intended to accomplish the task within short and with enough sensitivity. 

What We Liked 

  • Appropriate size for the instrument listed;
  • Highly sturdy tip;
  • Fully resistor type;
  • No need for overtightening;
  • Durable. 


  • Nothing noticeable. 

2. Stihl Spark Plug Set for Trimmers Chainsaws


Weight 2.9 pounds 
Compatible with  2-cycle engine powered machines
Gap .027”
thread size10mm
Type Compact Small engine plug 
Heat range 8

Such a long-term utilizable, better performance maintaining Stihl spark plug is the right choice for other Stihl spark plugs. Here is a tip to remember before application because the machine accessory is important for compact small engine plugs, as well as 2-stroke engine-powered machines. 

Compared to the previous Stihl fit chainsaw spark plug, this model has a capacity for .027-inch gapping. Else the thread size is unparalleled with our thoroughly discussed models, which is around 10mm. However, its heat range is nothing like a lower version to tolerate the engine warmth and keep the engine quite well-performed.  

What We Liked 

  • Better performance;
  • Durable;
  • Fits with other Stihl 2-stroke engines;
  • Affordable;
  • Resistor type. 


  • Found nothing. 

3. Powtol CMR6H Spark Plug Fit for Stihl Chainsaw


Weight 3 pounds 
Compatible model numbers Stihl BR500 BR550 BR600 Backpack Blower and Stihl FS40 FS40C FS50 FS50C FS50-L FS56 FS56R FS56C FS56RC FS70 FS70C FS70RC FC56C FC70C KM56 KM56R KM56C KM56RC HT56C trimmer
Heat range 7
thread size14mm
Seat Gasket 

Is it a double platinum spark plug to step forward for testing compatibility with Stihl chainsaws, trimmers, and more. However, this is not a double-platinum plug, so we got overwhelmed suddenly. What attracted us to apply it more functionally? Well, the answer is in its height standard, approximately it is a JIS height in its construction. 

Overall, the gasket seat, less heat range yet quite good temperature tolerance power compared to the previous model. Sounds great? What else? Its thread size is about 14mm and removal nuts give additional power to its upgrade.

What We Liked 

  • A wide range of compatibility with chainsaw models;
  • Durable;
  • Good range of thread size;
  • Heat tolerance;
  • Projected tips.


  • May the nuts require overtightening;
  • Hefty-priced. 

4. Champion 104 Spark Plug for Stihl Chainsaw


Weight 3 pounds 
Material Copper 
Hex size 5/8″
thread size14mm
Heat range 17 

If you are intending to drive a performance vehicle that has such a copper-coated spark plug, then you are safe. Why? Champion Copper-guarded spark plugs can assist operating machines and prevent plug sparking inside your 2-stroke compact vehicle. 

Moreover, the Copper core center electrode not only allows the user to control the machine’s heat range but also to resist fouling with an anti-corrosion protective system. Besides being much more compatible, in fact, according to our experience with Stihl chainsaw interaction and durability, it performed nicely because of its full replacement matches with OE type. 

What We Liked 

  • Higher compatibility with Stihl chainsaws;
  • Anti-corrosion coating;
  • Copper plug for heat prevention;
  • Durable. 


  • Non-resistor tips. 

5. Stens 130-146 Spark Plug for Stihl Chainsaw


Weight 4 pounds 
Power source Gasoline 
Gap 0.028″ (0.7mm)
thread size12mm 
Tip Projected 

What makes it to be the last one, yet not the least? Well, Its heavy-weighted carrying feature and a gasoline power source conduct. However, featuring heat-resistance control and projected tips, as well as the thread size, are very much compatible to work with.

Speaking the truth of its construction, from its core to coating level, gapping capacity around .028-inch which have presented it as unusual. Although it has a stud terminal thread like the previous model of Champion, it conducts much better. What about a gasket seat? Well, nothing special, yet a great advantage of construction to control a chainsaw at ease with heat range access for controlling as well. 

What We Liked 

  • Compatible with a wide range of models;
  • Durable;
  • Heat-resistant;
  • Wide gaping performance;
  • Projected tips. 


  • Require over tightening after a while;
  • Heavy-weighted;
  • Gasoline power source. 

Opt-out Factors About Spark Plug for Your Stihl Chainsaw

Replacement Compatibility 

When you have felt the need for a spark plug for your one or two-stroke machine, then a suitable replacement to the Stihl chainsaw is the biggest factor. Why? Plug type, for instance, professionals recommend OE type to maintain and for the good performance of your hefty-priced sports car because each contains a turbocharged engine. 

Turn your eyes to the manufacturer guideline of your chainsaw and start searching for the perfect chainsaw spark plug unless it is at a high risk of damaging engines. An Iridium plug or double Platinum plug is a good option in this case. 


Most of the spark plugs out of the manufacturer’s site have been delivered to last for longer applications. Material such as Iridium and Platinum with Copper coating contains correct electrodes to make vehicle performance well. In technical terms, there is a simple strategy to make these last longer, for instance, remove them from the machine if there is a zero need of driving for more than 5 years. 

Rust and corrosion can hit the cylinder head for no longer usage, in fact, it will be very much expensive to repair and further maintenance. 

Heat Range Control 

Superior electrode material inside a spark plug helps in controlling machines’ heat. This is one of the fastest parameters, in particular, a spark plug thermal management specified by the manufacturers. Any range of soot can build in it, acting like a resistor.

Running for a high range of periods can increase the extremeness of heat, in fact, high load too. So, it is impactful to choose the right heat-resistant operating spark plug.  


Check out the gapping of the spark plugs before installing them into the vehicle. Right out of the industrial factory, the plugs may have gapped too close. Gapping between the equipment indicates the precise setting of the ground electrodes and the center.

Then it will form into 2 little straps. If it is narrow, then bend the ground electrode away to decrease the width. 

Wrap Up 

From the worthy Copper-core electrode spark plugs to affordable Iridium electrodes can change your Stihl chainsaw compatibility to work longer or less time. When changing out your utilized Stihl chainsaw’s spark plugs, work carefully and go in a sluggish way.  

To work with less risk like a broken record, users can purchase a precise spark plug set from our well-informed listed ones with a complete buyer’s guide above mentioned.

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About This Writer

david rowan author

Hello, I am David Rowan. I am a professional contractor with 10 years of experience in home building, different tools used, construction, home remodeling, and other home improvement work. I have already built many custom homes and continued to do several woodworking projects along with how to deal with all categories of tools.

Hello, I am David Rowan. I am a professional contractor with 10 years of experience in home building, different tools used, construction, home remodeling, and other home improvement work. I have already built many custom homes and continued to do several woodworking projects along with how to deal with all categories of tools.

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