Like any other piece of power equipment, chainsaws need three key components to function. The key components needed to run are fire, fuel, and air. If any of these three components are not present in the correct specification, the chainsaw will not run properly, or it may not run at all.
The component that I will be discussing as the topic of this article is the spark plug. More specifically, what kind of spark plug does a Stihl chainsaw use.
Stihl Chainsaws use two different spark plugs depending on the chainsaw model. The NGK BPMR7A and the NGK CMR6H are the two spark plugs used in Stihl chainsaws.
The NGK BPMR7A spark plug is the correct spark plug for the following Stihl Chainsaws: 017, 019, MS170, MS180, MS191, MS192, 024, MS240, 025, MS250, 026, MS260, MS261, MS270, MS271, 028, MS280, 029, MS290, MS291, 031, MS310, MS311, 039, MS390, MS391, 036, MS360, MS361, 044, MS440, MS441, 046, MS460, MS461, 066, MS660, MS661, 088, MS880, MS881.
The NGK BPMR7A spark plug can be purchased
HERE ON AMAZON
The NGK CMR6H spark plug is the correct spark plug for the following Stihl Chainsaws: MS171, MS181, MS193, MS194, MS211, MS241, MS251, MS362.
The NGK CMR6H spark plug can be purchased
HERE ON AMAZON.
Stihl Chainsaw Spark Plug Chart
| Chainsaw Model Number | Spark Plug Part Number | Chainsaw Model Number | Spark Plug Part Number | |
| 017 | NGK BPMR7A | MS290 | NGK BPMR7A | |
| MS170 | NGK BPMR7A | MS291 | NGK BPMR7A | |
| MS171 | NGK CMR6H | 031 | NGK BPMR7A | |
| MS180 | NGK BPMR7A | MS310 | NGK BPMR7A | |
| MS181 | NGK CMR6H | MS311 | NGK BPMR7A | |
| 019 | NGK BPMR7A | 039 | NGK BPMR7A | |
| MS191 | NGK BPMR7A | MS390 | NGK BPMR7A | |
| MS192 | NGK BPMR7A | MS391 | NGK BPMR7A | |
| MS193 | NGK CMR6H | 036 | NGK BPMR7A | |
| MS194 | NGK CMR6H | MS360 | NGK BPMR7A | |
| MS211 | NGK CMR6H | MS361 | NGK BPMR7A | |
| 024 | NGK BPMR7A | MS362 | NGK CMR6H | |
| MS240 | NGK BPMR7A | 044 | NGK BPMR7A | |
| MS241 | NGK CMR6H | MS440 | NGK BPMR7A | |
| 025 | NGK BPMR7A | MS441 | NGK BPMR7A | |
| MS250 | NGK BPMR7A | 046 | NGK BPMR7A | |
| MS251 | NGK CMR6H | MS460 | NGK BPMR7A | |
| 026 | NGK BPMR7A | MS461 | NGK BPMR7A | |
| MS260 | NGK BPMR7A | MS462 | NGK BPMR7A | |
| MS261 | NGK BPMR7A | 066 | NGK BPMR7A | |
| MS270 | NGK BPMR7A | MS660 | NGK BPMR7A | |
| MS271 | NGK BPMR7A | MS661 | NGK BPMR7A | |
| 028 | NGK BPMR7A | 088 | NGK BPMR7A | |
| MS280 | NGK BPMR7A | MS880 | NGK BPMR7A | |
| 029 | NGK BPMR7A | MS881 | NGK BPMR7A |
What Is The Cross Reference for the NGK BPMR7A Spark Plug?
What spark plug can be used in place of the NGK BPMR7A in a Stihl Chainsaw?
The cross-reference for the NGK BPMR7A spark plug is the Bosch WSR6F spark plug. The Bosch WSR6F can be used in place of the NGK BPMR7A in Stihl Chainsaws that call for the NGK BPMR7A.
What Is The Cross Reference for the NGK CMR6H Spark Plug?
What spark plug can be used in place of the NGK CMR6H Spark Plug in a Stihl Chainsaw?
The cross-reference for the NGK CMR6H spark plug is the Bosch USR7AC spark plug. The Bosch USR7AC Spark Plug can be used in place of the NGK CMR6H in Stihl Chainsaws that call for the NGK CMR6H.
What Type of Spark Plug Does a Stihl Chainsaw Use?
Stihl Chainsaws can use two different spark plugs depending on which model Stihl chainsaw needs the spark plug. The majority of Stihl chainsaws use the NGK BPMR7A (or equivalent cross-reference) spark plug. Some Stihl chainsaws such as the MS171, MS181, MS193, MS194, MS211, MS241, MS251, MS362, and MS462 use the NGK CMR6H (or equivalent cross-reference) spark plug.
What Size Spark Plug Does a Stihl Chainsaw Use?
Chainsaw spark plugs are not categorized according to size but instead categorized by part number. However, different spark plugs can be different in size in regards to the hex head size and thread length/diameter. Always refer to your owner’s manual for the correct spark plug for your chainsaw.
What Spark Plug Does a Stihl 017 Chainsaw Take?
Stihl 017 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS170 Chainsaw Take?
Stihl MS170 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS171 Chainsaw Take?
Stihl MS171 chainsaws use the NGK CMR6H spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK CMR6H spark plug is 5/8″ (16mm).
What Spark Plug Does a Stihl MS180 Chainsaw Take?
Stihl MS180 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS181 Chainsaw Take?
Stihl MS181 chainsaws use the NGK CMR6H spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK CMR6H spark plug is 5/8″ (16mm).
What Spark Plug Does a Stihl 019 Chainsaw Take?
Stihl 019 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS191 Chainsaw Take?
Stihl MS191 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS192 Chainsaw Take?
Stihl MS192 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS193 Chainsaw Take?
Stihl MS193 chainsaws use the NGK CMR6H spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK CMR6H spark plug is 5/8″ (16mm).
What Spark Plug Does a Stihl MS194 Chainsaw Take?
Stihl MS194 chainsaws use the NGK CMR6H spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK CMR6H spark plug is 5/8″ (16mm).
What Spark Plug Does a Stihl MS211 Chainsaw Take?
Stihl MS211 chainsaws use the NGK CMR6H spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK CMR6H spark plug is 5/8″ (16mm).
What Spark Plug Does a Stihl 024 Chainsaw Take?
Stihl 024 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS240 Chainsaw Take?
Stihl MS240 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS241 Chainsaw Take?
Stihl MS241 chainsaws use the NGK CMR6H spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK CMR6H spark plug is 5/8″ (16mm).
What Spark Plug Does a Stihl 025 Chainsaw Take?
Stihl 025 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS250 Chainsaw Take?
Stihl MS250 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS251 Chainsaw Take?
Stihl MS251 chainsaws use the NGK CMR6H spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK CMR6H spark plug is 5/8″ (16mm).
What Spark Plug Does a Stihl 026 Chainsaw Take?
Stihl 026 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS260 Chainsaw Take?
Stihl MS260 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS261 Chainsaw Take?
Stihl MS261 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS270 Chainsaw Take?
Stihl MS270 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS271 Chainsaw Take?
Stihl MS271 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl 028 Chainsaw Take?
Stihl 028 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS280 Chainsaw Take?
Stihl MS280 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl 029 Chainsaw Take?
Stihl 029 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS290 Chainsaw Take?
Stihl MS290 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS291 Chainsaw Take?
Stihl MS291 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl 031 Chainsaw Take?
Stihl 031 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS310 Chainsaw Take?
Stihl MS310 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS311 Chainsaw Take?
Stihl MS311 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl 039 Chainsaw Take?
Stihl 039 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS390 Chainsaw Take?
Stihl MS390 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS391 Chainsaw Take?
Stihl MS391 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl 036 Chainsaw Take?
Stihl 036 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS360 Chainsaw Take?
Stihl MS360 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS361 Chainsaw Take?
Stihl MS361 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS362 Chainsaw Take?
Stihl MS362 chainsaws use the NGK CMR6H spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK CMR6H spark plug is 5/8″ (16mm).
What Spark Plug Does a Stihl 044 Chainsaw Take?
Stihl 044 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS440 Chainsaw Take?
Stihl MS440 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS441 Chainsaw Take?
Stihl MS441 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl 046 Chainsaw Take?
Stihl 046 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS460 Chainsaw Take?
Stihl MS460 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS461 Chainsaw Take?
Stihl MS461 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS462 Chainsaw Take?
Stihl MS462 chainsaws use the NGK CMR6H spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK CMR6H spark plug is 5/8″ (16mm).
What Spark Plug Does a Stihl 066 Chainsaw Take?
Stihl 066 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS660 Chainsaw Take?
Stihl MS660 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS661 Chainsaw Take?
Stihl MS661 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl 088 Chainsaw Take?
Stihl 088 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS880 Chainsaw Take?
Stihl MS880 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
What Spark Plug Does a Stihl MS881 Chainsaw Take?
Stihl MS881 chainsaws use the NGK BPMR7A spark plug or equivalent cross-reference. The wrench size needed to remove and install the NGK BPMR7A spark plug is 3/4″ (19mm).
Are spark plug wrenches Universal?
Spark plug wrenches are universal in the sense they are not chainsaw brand specific. However, the hex head of the spark plug needs to be matched to the size of the spark plug wrench. For example the NGK BPMR7A Spark Plug has a 3/4″ (19mm) hex head and needs a spark plug wrench with a 3/4″ (19mm) wrench to remove and install the spark plug.
How do I know if my chainsaw spark plug is bad?
A bad spark plug is determined by removing the spark plug and examining the spark plug electrode end of the spark plug. If the spark plug electrode end is discolored, pitted, or caked in a dark substance called carbon the spark plug is fouled and will need to be replaced.
If the spark plug appears to be ok you will need to check to see if the engine coil is firing. The easiest and safest way to check the ignition coil fire is with an inline spark plug tester. Inline spark plug testers are cheap and available in most hardware stores.
How do you check a spark plug on a Stihl chainsaw?
If your Stihl chainsaw is not starting and you think your spark plug may be fouled you need to check the ignition coil and spark plug.
To check the ignition coil use and inline spark tester. Checking the spark plug requires the removal of the spark plug and examining the electrode end of the spark plug for carbon build-up or heat damage.
Wrapping Up
Stihl Chainsaws are expertly engineered and tuned to specific specifications. When replacing the spark plug of a Stihl chainsaw be sure you are selecting the appropriate replacement or cross-reference of the spark plug.
Stihl chainsaws use either an NGK BPMR7A or NGK CMR6H spark plug. Refer to your owner’s manual or the chart above to find the appropriate replacement part number for your spark plug.
Have a great day and be safe out there.