The Stihl MS250 Spark Plug: Ideal Match for Your Chainsaw

A chainsaw’s performance is only as strong as its ignition system, and one feature that makes this happen is the spark plug. When it comes to the StihlMS250, the importance of using a high-quality replacement spark plug cannot be understated.

This is if you want your chainsaw to exhibit reliable ignition, efficient combustion, and consistently produce power. I have written this comprehensive guide to offer expert insights on the recommended Stihl MS250 spark plug brands.

learn about stihl ms250 spark plug

You will also learn about maintaining, replacing, and optimizing your Stihl MS250, so get ready to unleash its full potential through the power of the spark plug. Keep reading to find out more!

Significance of the Stihl MS250 Spark Plug

Significance of the Stihl MS250 Spark Plug

Despite its small size, the spark plug plays a vital role in the combustion process of the Stihl MS250 chainsaw. It provides an electrical spark that fires the fuel-air mixture in the engine’s combustion chamber.

This creates a controlled explosion, and the pistons tap the resulting energy, which helps power up your engine. The Stihl MS250 spark plug also dissipates heat to ensure your engine performs consistently without fouling.

However, for your chainsaw to deliver a reliable cutting performance at all times, your spark plug must be in top-notch condition. A worn or damaged Stihl chainsaw spark plug can lead to misfires, reduced power output, difficulty starting the engine, and poor fuel consumption.

Recommended Stihl MS250 Spark Plug Brands

Recommended Stihl MS250 Spark Plug Brands

OEM (Original Equipment Manufacturers) spark plugs offer unmatched spark production and durability. However, there are replacement spark plugs that perform just as well. Here are a few of them that immediately come to mind:

1. NGK (6703) BPMR7A Spark Plugs

  • Thread Size: 14mm
  • Thread Reach: 19mm
  • Seat Type: Gasket
  • Hex Size: 19mm
  • Gap Size: 0.020 inches
  • Electrode: Nickel

The NGK brand produces spark plugs that provide superior ignition. The BPMR7A is tailored for various chainsaws, including the Stihl MS250. It has a solid terminal design to ensure a secure connection and reliable spark delivery.

It is also designed to reduce electromagnetic interference to prevent any interference with electronic components.

2. Bosch (7547) WSR6F Super Spark Plug

  • Thread Size: 14mm
  • Thread Reach: 9.5mm
  • Hex Size: 19mm
  • Gap Size: 0.5mm
  • Electrode: Nickel-Yttrium

Next, you have the Bosch (7547) WSR6F, which is just as reliable as the NGK BPMR7A. This spark plug comes with a removable nut terminal design for easy installation and removal. Its electrode is made from a nickel alloy, enabling it to resist heat and prolonged use.

3. Champion RCJ7Y Spark Plug

  • Thread Size: 14mm
  • Thread Reach: 9.5mm
  • Hex Size: 19mm
  • Gap Size: 0.7mm
  • Electrode: Copper

If you can’t find either of the two spark plug brands I mentioned above, then you can go for the Champion RCJ7Y, also known for consistent performance and compatibility.

Stihl MS250 Spark Plug Best Practices

Best Practices of Stihl MS250 Spark Plug

If you want to optimize the performance and lifespan of your Stihl MS250 spark plug, then you should consider doing the following:

  • Regularly inspect the spark plug to ensure that they are in top-notch condition. There should be no fouling or electrode erosion.
  • Clean the spark plug from time to time using a wire brush and a suitable solvent to remove any carbon buildup.
  • Check the spark plug gap regularly and adjust it if necessary. The spark plug gap should always be identical to what the manufacturer’s specifications recommend.
  • Always store the chainsaw in a clean and dry environment to prevent dirt or debris from getting to the spark plug. This will also help to minimize corrosion.
  • Always use high-quality fuel the manufacturer recommends and mix it correctly to prevent your engine from getting damaged and the spark plug from fouling.

Troubleshooting Stihl MS250 Spark Plug Issues

Troubleshooting Stihl MS250 Spark Plug Issues

Despite regular maintenance, your spark plug may still face various problems. Understanding these problems and how to troubleshoot them can help you resolve them swiftly and efficiently. Some of the most common issues include fouling, electrode wear, and improper spark production.

By following some of the best practices I mentioned in the previous section, such as cleaning, regapping, or replacing the spark plug, you can restore your Stihl MS250 chainsaw to its best.

Read Also: Stihl MS250 VS Stihl MS251 (What Makes Them Different?)

Stihl MS250 Spark Plug Safety Considerations

You should always prioritize safety when working with Stihl MS250 spark plugs. Below are some of the most important safety considerations to keep in mind:

  • Always wear protective gear such as safety goggles and gloves when installing or replacing a spark plug.
  • Switch off your engine and let it cool completely before attempting spark plug maintenance.
  • Disconnect the spark plug wire to prevent your chainsaw engine from accidentally starting during repairs or maintenance.
  • Your tools should be properly insulated to prevent you from getting shocked. These include tools like pliers and spark plug wrenches.

Pro Tip: Follow the manufacturer’s spark plug replacement and maintenance guidelines.

Read Also: Stihl 462 Problems and Solutions


Hopefully, this article has provided all the information you need about the Stihl MS250 spark plug. The spark brands mentioned are specifically designed to meet the demands of the Stihl MS250 chainsaw operation.

However, whether you choose NGK, Champion, Bosch, or any other notable brand, regular maintenance and replacement of your spark plug will help ensure your chainsaw performs at its best.

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