Choosing The Best Spark Plug For Stihl MS 250 Gas Chainsaw

Choosing the right spark plug for your Stihl MS 250 gas chainsaw can make a huge difference in performance and efficiency. This guide will help you find the right spark plug for your machine, as well as explain why certain brands are better than others.

Read further to find out which Spark Plug is best for your Stihl MS 250 Gas Chainsaw. Stihl MS 250 is one of the most popular chainsaws from the brand [Stihl]( The 14” saw is capable of felling trees, cutting logs and even trimming branches in your backyard. It features a quick chain tensioning system, an anti-vibration system, and a sturdily built housing made up of metal.

What is the Spark Plug?

The spark plug is part of the combustion process. It is the device that makes a spark to ignite the air/fuel mixture so that combustion can occur. The spark plug is used in gasoline engines of cars, lawnmowers, chainsaws and many other vehicles. 

It produces an electric spark and delivers current from an ignition system to the combustion chamber of a gas powered engine. The spark plug has a metal threaded shell, electrically isolated from a central electrode by a ceramic insulator.

One of the most important parts of any internal combustion engine is the spark plug. It ignites the air-fuel mixture inside the combustion chamber by producing sparks with high voltage electricity. If your spark plug fails to ignite the mixture, it will result in a failed start or misfiring- both of which are detrimental to your engine’s health and performance.

How To Choose The Best Spark Plug For Stihl MS 250 Gas Chainsaw?

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spark plug for stihl ms 250

Here are a few things you need to consider when choosing the best spark plug for your gas chainsaw:

A. Heat Range

Heat range is the first and probably the most important thing you need to take into consideration when looking for a spark plug for your Stihl MS 250. The heat range of a spark plug determines how hot or cold it will run at, and this is an important factor because if it’s too cold, the engine may not be able to start well, but if it’s too hot, there can be excessive burning of fuel in the combustion chamber.

In general, colder plugs are recommended for high-performance engines because they can dissipate heat more efficiently. Hotter plugs are recommended for engines that use conventional fuels because they have a better ability to prevent fouling at low temperatures.

B. Thread Reach

It is also very important when choosing a spark plug because it determines how far the plug extends into the combustion chamber. The thread reach affects compression ratio as well as fuel efficiency of an engine.

A longer reach means less compression and better fuel efficiency while a shorter reach means more compression and worse fuel efficiency. A longer reach is usually recommended for engines that operate at higher RPMs and lower pressure while shorter reaches are recommended for slower RPM.

Which is the best Spark Plug For Stihl MS 250?

There are a lot of spark plugs out there and choosing the right one can be confusing. We’re here to help you with the best spark plug for Stihl MS 250. The best way to determine if your spark plug needs replacing is by checking whether your saw isn’t starting or if it runs roughly; both are telltale signs that it’s broken.

Having a Spark Plug which is efficient and optimized for your Best Stihl MS Chainsaw can have a major impact on its performance. A faulty Spark Plug will cause your engine to misfire, run rough, or even not start at all. So choosing the right one for your chainsaw is crucial.

You can choose and buy the best spark plug from Walmart, eBay or Amazon sites, there are a lot of options there, it’s super easy to find the one suits for the stihl ms 250 chainsaw.

How often to change a spark plug in a Stihl MS250?

In order to make sure your MS250 chainsaw will work properly and serve you for a long time you need to choose the best spark plug for Stihl MS 250 chainsaw. If the spark plug is too hot or cold it can cause hard starting and poor engine performance. How often do I need to change a spark plug in a Stihl Chainsaw? You should change the spark plug every 100-200 hours of operation or once a year if you use your tool less frequently.

For most Stihl chainsaws, you need to change the spark plug once a year. However, some of the newer models have a spark plug that needs changing every 2 years. Check your owner’s manual to see when your model needs its spark plug replaced. We always replace the spark plug at the beginning of each season, regardless of what our owner’s manual says.

The average lifespan of a spark plug is around 100 hours, but this can depend on a few factors, such as how often you use it and what kind of environment you’re using it in (i.e., if there are many contaminants like dirt or oil). It’s important that your spark plug is working properly because otherwise, there will be no way for you to start up your chainsaw when you need it most! And if you’re not able to get any work done because of one faulty piece in your machinery then obviously this could have serious consequences on both time management as well as money.

You will know it’s time for a new one if you have noticed that your saw has trouble starting or is running rough, or if the plug itself is visibly damaged. One of the most common signs of a bad spark plug is that the engine won’t start at all.

The Role of the Spark Plug

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The spark plug is an integral part of the gas chainsaw. It’s responsible for igniting the fuel in the combustion engine of your chainsaw, after all. That makes it a critical component to your chainsaw’s performance!

But what exactly does a spark plug do? Well, it works to produce an electric spark that is used to ignite the air and fuel mixture in the combustion chamber of your chainsaw. This creates a controlled explosion that powers the engine. Without this explosion, your tool won’t work at all! Your spark plug is essentially the ignition system. It needs to be replaced periodically to keep your chainsaw running smoothly and efficiently.

The spark plug is a vital part of any two-cycle engine, such as in your Stihl MS 250 chainsaw. Its role is to produce the spark that ignites the fuel in the combustion chamber. The fuel source could be gasoline, natural gas or propane. An ignition system is responsible for producing this spark and may include an ignition coil, distributor cap, rotor arm and spark plug wires.

In engines with a single cylinder, such as your Stihl MS 250 chainsaw, there is only one spark plug. The electrode of the spark plug must make contact with the metal cylinder head of the engine for the circuit to be completed and for a spark to occur. A gap exists between these two surfaces that allows a high-voltage current from the ignition coil to bridge across this distance and start combustion.

Checking the Plug

If your chainsaw is running poorly, you should check the spark plug first. Over time, the spark plug wears out and needs to be replaced. You can determine if it needs replacement by removing it from the engine and checking the porcelain insulator (the white part). If it is cracked, pitted, or burned away, you need to replace the spark plug. 

Now grab your spark tester and test the plug by attaching one end of the tester to the threaded metal part of the plug and making sure the other end points away from you by at least three feet. Now pull the starter rope while holding on firmly to the spark tester. If you see a bright blue spark jumping between the two electrodes, then your plug is working properly and no further action needs to be taken.

To Clean or Replace

It’s important to keep an eye on your spark plug, making sure it’s in good condition and clean; it should be replaced every 50 hours of use or once a year, whichever comes first. Checking your spark plug requires removing it from the engine and visually inspecting it for issues like cracks or discoloration. The gap between the electrodes (the prongs on one end of the plug) should measure as specified in your user manual; if they’re too far apart, they won’t ignite fuel properly, causing misfiring and poor fuel efficiency.

Before installing a new spark plug, clean the area around it and wipe off any oil or dirt on the threads of the spark plug hole. The first thing you need to do is remove the plug from the chainsaw. Once it’s off, use a wire brush with a wooden or plastic handle to clean away any carbon or debris that may be on it. 

Regular cleaning may prolong the life of a spark plug, but if you notice any cracks in the porcelain insulator or any other signs of damage, you should replace the spark plug immediately. You can perform routine maintenance on your spark plug by cleaning it regularly with a wire brush and wiping it off with a clean rag.

Avoid Ethanol Fuel

If you decide that ethanol fuel is right for you, then do not use copper or platinum spark plugs, as they will burn out quickly. Instead, opt for iridium spark plugs. These can handle the higher temperatures generated by ethanol fuel without burning out as quickly.

Ethanol fuel burns hotter than regular unleaded gas because it contains an extra molecule (the oxygen atom) that increases the energy released during combustion. This means that if you’re using ethanol fuel in your chainsaw, it’s important to consider how efficient the engine cooling system is before buying a spark plug designed for ethanol use. If your engine doesn’t have great cooling capabilities, then go with iridium spark plugs instead of copper or platinum ones.


There are a lot of other things which must be kept in mind while buying the spark plug for your MS250 chainsaw. Make sure that you do not buy a spark plug from a brand that does not have a huge market share. This is because some brands might be unknown in the direction of spark plugs and thus cannot ensure the quality of their products.