Lawnmowers are a staple in most yards. They make keeping the grass trimmed and tidy a much easier task. Like any machine with moving parts, they require regular maintenance to keep them running smoothly. 

Spark plug plays a vital role in the function of a lawnmower engine. As time passes, they may become fouled or damaged and require cleaning or replacement. You must know the safe way to unplug the spark plug socket to avoid critical accidents. 

There can be a situation when you don’t have a socket wrench or the right size to remove the spark plug. In such cases, you need to know how to remove a lawn mower spark plug without a socket. Let’s explore the effective methods to do so.

How to Remove a Lawn Mower Spark Plug Without a Socket? Step-by-step Guide

spark plug lead

As any gardener knows, a lawnmower is an essential tool for keeping your lawn looking its best. 

A well-manicured lawn can add value to a home and make it more enjoyable to spend time outdoors. When a spark plug becomes old and worn, it can no longer create the strong spark needed to ignite the fuel in the engine. 

As a result, the engine may run less smoothly, or it may not start at all. In addition, an old spark plug can cause excessive vibration, which can damage other parts of the engine. 

Therefore, it is important to replace an old spark plug as soon as possible to avoid these problems. 

Even though it is typically done with a spark plug socket, you can also perform the installation and removal without one. Just follow the steps given below, and you will be able to do it without any difficulty.

Step 01: Collect the Required Tools and Supplies

Any experienced do-it-yourselfer knows that one of the keys to a successful project is being prepared ahead of time. This means having all of the necessary tools and supplies on hand before you start. 

Trying to track down a missing piece in the middle of a job can not only be frustrating, but it can also lead to mistakes that could have been easily avoided. 

In addition, having everything you need on hand will help you to work more efficiently and avoid unnecessary trips to the store. So before you start your next project, take a few minutes to gather everything you need. 

For this project, you will need an adjustable spark plug wrench, plier, strong magnet, nut wrench, rubber hose, etc. These items will assist you in changing spark plugs without using a spark plug socket.

Step 02: Park the Lawnmower on a Flat Surface

When you have gathered all of the necessary tools, you should place the lawnmower on a level surface.

This will help to prevent it from tipping over while you are working on it. In addition, it will make it easier to access the spark plug. Make sure that the engine is turned off and cooled before proceeding. 

Otherwise, you could be seriously injured. Furthermore, you should apply the brakes while you are working to prevent the lawnmower from moving.

Step 03: Remove the Lawn Mower’s Spark Plug Cover

Now that you have everything you need and the lawnmower is parked on a flat surface, the next step is to take off the spark plug cover. 

It is actually a wire with a cap attached to one end. An electric current travels through the wire to the spark plug, which ignites the fuel in the engine. 

Removing the cover will give you access to the spark plug, which you can then remove. Simply pull off the cap of the spark plug to complete the procedure. Consequently, you will be able to see the spark plug.

Step 04: Clean the Area Around the Spark Plug

After the spark plug cover is removed, the next step is to thoroughly clean the area around the spark plug.

This will help to prevent dirt and debris from entering the engine when you remove the spark plug. You may use a soft and dry cloth to remove dirt or debris accumulated around the spark plug.

Step 05: Remove the Spark Plug

spark plug gap

Having successfully passed the previous steps, you are now ready to pull the spark plug. 

You can use various tools such as a plier, adjustable wrench, strong magnet, or nut wrench to disengage the spark plug. Let’s discuss the procedure for removing the spark plug using each of these tools.

Adjustable wrench: An adjustable wrench, also known as a crescent wrench, is a hand tool used to turn nuts and bolts of various sizes. 

It consists of a handle with a jaw that can be adjusted to fit around the nut or bolt head. The jaws are opened and closed using a thumbscrew or ratchet mechanism. 

In order to disassemble the spark plug using an adjustable wrench, you should wrap the wrench jaws around the spark plug and then set the wrench to the appropriate size. 

Turn the wrench counterclockwise to take out the spark plug. Make sure not to overtighten the wrench, as this could damage the spark plug. After loosening the spark plug, remove it by hand.

Plier: Pliers are a type of hand tool used for gripping objects. They typically have two handles and two jaws, which are made of metal or other durable materials. 

The jaws can be smooth or serrated, and the tips may be pointed or flat. Pliers are used for a variety of tasks, including holding, cutting, and bending wire. In addition, pliers can be used to tighten or loosen nuts and bolts. 

Pliers come in a variety of sizes and shapes, and they can be used for both light-duty and heavy-duty tasks. Removing a spark plug with pliers is a relatively simple task. 

Simply grip the spark plug with the jaws of the pliers and turn it in a counterclockwise direction to loosen it. Remove the spark plug by hand after it has been loosened.

Plier and Strong Magnet: Some spark plug is located in a deep and difficult-to-reach area. The spark plug may need to be removed with a plier and strong magnet in such situations.

In this case, you need to use slim pliers with long and narrow jaws. Place the jaws of the pliers around the spark plug and grip it firmly. Then, lose the spark plug by turning the pliers counterclockwise. 

After loosening the spark plug, take the strong magnet and place it on top of the spark plug. The magnet will help to pull out the spark plug from the deep area.

Nut Wrench: A nut wrench is a specialized tool used to loosen or tighten nuts. It is a type of spanner, and it typically has two jaws that are adjustable to fit around the nut. 

The jaws of the wrench are also usually serrated, which helps to grip the nut more securely. To remove a spark plug using a nut wrench, simply place the jaws of the wrench around the spark plug and turn counterclockwise to loosen it. Once the spark plug is loosened, remove it by hand.

Rubber Hose and WD-40: In some cases, the spark plug may be corroded or stuck in place. In such cases, you may need to use a rubber hose and WD-40 to unscrew the spark plug. 

First, you need to apply WD-40 to the spark plug. This will help to lubricate and loosen the nut. Then, take the rubber hose and place it over the spark plug. 

The hose will help to grip the plug and prevent it from turning when you try to remove it. Finally, use a wrench or pliers to turn the spark plug counterclockwise until it is loose enough to be removed by hand.

Step 06: Clean or Replace the Spark Plug

It is necessary to replace or clean the spark plug after it has been removed. If the spark plug is covered in dirt or debris, you can use a wire brush to clean it.

Simply insert the wire brush into the spark plug hole and rotate it back and forth to remove any build-up on the spark plug. If there is damage to or wear on the spark plug, you will need to replace it.

Step 07: Re-install the Spark Plug

After you have cleaned or bought a new spark plug, you need to re-install it. To do this, simply thread the spark plug into the hole by hand. 

Once the spark plug is in place, you will need to tighten it. Be careful not to overtighten the spark plug, as this could damage it.

Step 08: Reconnect the Spark Plug Wire Cap

As soon as the spark plug is tightened, the wire cap must be inserted. In order to accomplish this, simply push the wire cap onto the spark plug end. You should ensure that the wire cap is pushed on all the way so that the connection is good.

Step 09: Test the Lawn Mower

The final step is to test the lawnmower (both push or riding lawn mower) to see if the spark plug is functioning properly. Add fuel to the lawnmower and then attempt to start it. 

It is likely that the spark plug was correctly installed if the lawnmower begins to run without issue. On the other hand, if the lawnmower does not start, you may need to check the spark plug to see if it is loose or damaged. 

By following the steps above, you should be able to disconnect the spark plug from your lawnmower without too much difficulty. 

During the process, take care not to damage the spark plug. With a little patience, you’ll have your lawnmower up and running quickly.

Safety Precautions When Handling a Lawnmower Spark Plug

spark plug gauge

Taking proper safety precautions is always important, but it’s especially important when dealing with a lawnmower spark plug. 

After all, spark plugs create sparks that can easily ignite gas and oil, leading to a fire or explosion. To avoid such dangers, be sure to take the following precautions:

Wear Gloves: Always wear gloves when working with the spark plug of a lawnmower. This will protect your hands from any accidental sparks.

Turn Off the Lawn Mower: Be sure to turn off the lawnmower before attempting to disengage the spark plug. This will help to prevent any accidental ignitions.

Close the Gas Valve: It’s also a good idea to close the gas valve on the lawnmower. Ultimately, you will be able to prevent any fuel leaks that could cause a fire.

Work In a Well-Ventilated Area: When removing the spark plug, ensure that the area is well-ventilated. By doing so, any fumes that are present will be dispersed and will not ignite.

By following these simple safety precautions, you can avoid any accidents or injuries while removing the lawn mower spark plug. Just be sure to take your time and be careful, and you’ll be finished instantly.

Frequently Asked Questions:

There are a few questions that are commonly asked about removing a lawn mower spark plug. Below, we will answer some of the most frequently asked questions to help put your mind at ease.

1. Are Lawn Mower Spark Plugs All the Same?

There is no such thing as a universal lawn mower spark plug. In fact, there are a variety of different types of spark plugs that can be used in lawnmowers. The type of spark plug that you will need will depend on the make and model of your lawnmower.

2. What Happens If You Install the Wrong Spark Plug In Your Lawn Mower?

The engine of your lawn mower will likely fail to run properly if you install the incorrect spark plug. In some cases, the engine may not start at all. As well, the wrong spark plug will not be able to support the thread size of the spark plug hole.

3. What Is the Most Common Thread Size of a Lawn Mower Spark Plug?

For lawn mower spark plugs, the thread size is typically between 10 and 12 mm. However, it’s always best to consult your lawn mower’s owner’s manual to be sure.

4. How Often Should I Replace My Lawn Mower Spark Plug?

You should generally replace your lawn mower spark plug at least once each season. However, this may vary depending on how often you use your lawnmower. 

Regarding the use of your spark plug, it is recommended to change your spark plug every 25 hours of operation. If you find that the spark plug is damaged or worn out, be sure to replace it as soon as possible.


We hope that you have fully understood how to remove a lawn mower spark plug without a socket. Always remember to take your time with the process and be as safe as possible to avoid any accidents. 

When purchasing a new lawnmower spark plug, make sure you choose the correct one for your make and model. Don’t forget to replace your spark plug approximately once per season (or after every 25 hours of use) to ensure that your lawnmower runs efficiently.