How to Remove Lawn Mower Spark Plug

Do you need help getting your lawn mower started? Before you take it in for repair, a faulty spark plug is one of the most common causes of engine failure. Fortunately, changing a spark plug is relatively straightforward and can be done in a few steps.

How to Remove Lawn Mower Spark Plug

Lawn mower maintenance is essential for keeping your lawn looking its best. If your mower isn’t performing as it used to, one of the first things you should check is the spark plug. The spark plug ignites the fuel within a mower engine and helps keep it running smoothly.

Removing a spark plug from a lawnmower can be intimidating but don’t fear – we’ve got all of the information you need to get through this small project!

In this post, you’ll learn how to remove lawn mower spark plug in just a few easy steps.

What Will You Need?

You will need a few supplies before you can remove the spark plug from your lawn mower. Here’s what you’ll need to get started:

  • Spark plug socket wrench
  • Socket extension
  • Ratchet
  • Protective eyewear

Once you have all these supplies gathered, you’re ready to start!

10 Easy Steps on How to Remove Lawn Mower Spark Plug

Step 1: Preparing Your Mower

The first step is to ensure your mower is in the “off” position. It’s important to ensure that your mower won’t start up while you’re working on it. Once the switch is off, you can remove the spark plug cover. This will give you access to the spark plug itself.

Step 2: Removing the Spark Plug

Once the cover is off, attach your spark plug socket wrench to your extension. Place the socket over the spark plug, ensure it’s secure, and turn counterclockwise to loosen it. As you turn the wrench, the spark plug will emerge.

Step 3: Disconnecting the Spark Plug

Once you’ve loosened the spark plug, carefully remove it from the socket and set it aside. Be careful not to drop the plug, as it can be easily damaged! Additionally, wear protective eye gear when handling spark plugs,, as they can shoot out tiny sparks.

Carefully Remove It From the Socket

Step 4: Cleaning Out the Socket

Inspect the socket where the old spark plug was located for a few moments. Look for any traces of dirt, debris, or corrosion. If you find any, use a brush to remove it before inserting the new plug.

Step 5: Installing the New Spark Plug

Now that your socket is clean and ready to go insert your new spark plug. Make sure it’s firmly seated in place before moving on. Otherwise, it won’t function properly.

Step 6: Securing the New Spark Plug

Once you’ve installed your new spark plug, use your ratchet and socket wrench to tighten it in place. Make sure that it’s firmly secured before proceeding. Check for any loose connections and tighten them as needed.

Step 7: Connecting the Wires

Before you can reattach your spark plug cover, you’ll need to reconnect any wires connected to the spark plug. Make sure that they are tightly attached and secure before moving on. You can also use a spray cleaner to remove any corrosion from the wires.

Step 8: Reattaching the Spark Plug Cover

Once all of your wires are secured, it’s time to reattach your spark plug cover. Align the cover with the edges of the socket and press firmly to ensure a tight seal. Use a screwdriver to tighten any screws or fasteners as needed.

Reattach Your Spark Plug Cover

Step 9: Testing the Plug

Now that you’ve successfully replaced your spark plug, it’s time to test it out. Carefully start up your mower and listen for any strange noises or vibrations. If all sounds good, then you can enjoy a better running mower!

Step 10: Finishing Up

Once you’ve tested your mower and everything is running smoothly, you can close up the cover and put away all of your tools. Congratulations! You did it!

Now that you know how to remove the lawn mower spark plug, it’s time to give yourself a pat on the back for a job well done. You can keep your mower running like a dream with just a few small steps. Plus, regular maintenance will help extend the life of your lawn mower and ensure it keeps performing its best!

5 Additional Tips and Tricks

  1. Ensure you have the right size wrench or socket to ensure a snug fit and avoid stripping the spark plug.
  2. When removing the spark plug, hold onto it firmly because it may become hot immediately after use due to its proximity to the engine.
  3. Before removing the spark plug, check for any wear or damage affecting performance and replace it if necessary.
  4. When re-seating the spark plug, ensure it has a tight fit and is screwed in correctly to prevent any misfires or engine damage.
  5. After replacing the spark plug, be sure to check the gap between the electrodes using a feeler gauge and adjust it accordingly for optimal performance.

And remember, safety first! Always wear protective gear when working on a lawn mower or any other machine with an engine. Also, be sure to read the user manuals of your particular model for specific instructions and warnings. These simple steps will help ensure a safe and successful spark plug removal process.

5 Things You Should Avoid

  1. Don’t over-tighten the spark plug when re-seating it, as this can cause damage to the engine or misfire.
  2. Never touch a hot spark plug with your bare hands, as it could result in burns and other injuries.
  3. Don’t use lubricants on spark plugs; they can interfere with proper ignition and performance.
  4. Avoid using tools that are too large or not the right size for the spark plug, as this can cause damage to both the plug and the engine.
  5. Don’t use a dirty rag or any other foreign material when cleaning around a hot engine. This could create a fire hazard or other dangerous situations.
Don't Over Tighten the Spark Plug

By following these simple tips, you can ensure that you are doing the job correctly and safely every time.

How Do You Know if Spark Plugs Are Bad?

If your lawn mower is not starting correctly, the spark plugs may be blamed. To test if they are bad, you can use a spark plug tester or multimeter and check for any misfires or weak sparks.

If the spark plugs are faulty or worn out, they should be replaced with new ones as soon as possible to avoid any further damage to the engine. Additionally, spark plugs should be replaced approximately every 100 hours of operation or every season if they are not used often.

When replacing your lawn mower’s spark plug, always make sure to use the correct size and type for your model to ensure optimal performance and avoid any future issues. Following these simple steps will help keep your lawn mower running smoothly for years. Happy mowing!

Why Is There Oil on Your Spark Plugs?

Oil on your spark plugs can be a sign of serious engine trouble. Possible causes could be worn piston rings, damaged cylinder walls, or an overfilled oil reservoir. If you notice oil on the spark plug, it is important to take immediate action and investigate the issue further to prevent more damage from happening. Always consult with a professional if needed for any major repairs or maintenance.

If You Notice Oil on the Spark Plug

Additionally, it is important to regularly check the spark plugs for any signs of wear or damage. If they appear to be worn out, they should be replaced as soon as possible in order to avoid any further issues. Regularly replacing the spark plugs will help ensure your lawn mower performs optimally and runs smoothly for many years.

Overall, it’s important to be vigilant regarding spark plug maintenance and repair. Regularly inspecting and replacing spark plugs will help ensure your lawn mower runs like new for years to come. With the right knowledge and tools, you can be confident in your lawn mower’s performance and safety. Now, let’s get out there and enjoy our beautiful yards!

What Kind of Lubricant Can You Put on Spark Plugs?

It is important to note that spark plugs should not be lubricated with oil or other lubricant. If lubrication is necessary, a light coat of anti-seize compound can be used on the threads before installing the plug. This will help prevent potential corrosion and ensure a tight fit when replacing the spark plug.

Additionally, it’s important to use the correct size and type of spark plug that is compatible with your lawn mower engine.

By following these simple steps, you can ensure that your spark plugs are securely attached and running optimally. Regularly inspecting and replacing spark plugs will help keep your lawn mower running safely and efficiently.


In conclusion, knowing how to change out a spark plug on your lawn mower is imperative for the safety and effective use of such an important tool. Not only does it keep you safe from danger, but changing out your spark plug regularly will save you time by increasing the efficiency of your lawn mower.

Furthermore, understanding the basics of spark plug maintenance and repair can help you save money in the long run. Following these simple tips will ensure that your lawn mower runs optimally and last many years.

So, take a moment to familiarize yourself with how to remove lawn mower spark plugs and other related maintenance tasks. With a little care and attention, you can be sure your lawn mower will continue to provide you with years of service. Happy mowing, and thanks for reading!

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