How Do I Clean The Spark Plug On My Snowblower?

So, you’ve got yourself a snowblower and you’re ready to tackle those winter storms head-on. But before you rev it up and start clearing the snow like a champion, there’s one important step you don’t want to overlook – cleaning the spark plug. The spark plug is a crucial component of your snowblower’s engine, responsible for igniting the fuel-air mixture and keeping everything running smoothly. If it’s clogged or dirty, your snowblower may not start or run efficiently. Luckily, cleaning the spark plug is a fairly simple task that you can do yourself. In this article, we’ll walk you through the steps on how to clean the spark plug on your snowblower, so you can keep it in top shape all season long.

How Do I Clean The Spark Plug On My Snowblower?

Reasons to clean the spark plug

Cleaning the spark plug in your snowblower is an important maintenance task that shouldn’t be overlooked. There are several reasons why you should regularly clean the spark plug.

Improve performance

A clean spark plug can significantly improve the performance of your snowblower. Over time, the spark plug can become dirty and clogged with carbon deposits, which can hinder its ability to ignite the fuel-air mixture properly. By cleaning the spark plug, you ensure that it can deliver a strong, consistent spark, resulting in better engine performance and smoother operation.

Prevent starting issues

A dirty spark plug can also cause starting issues. If the spark plug is coated with carbon deposits or other contaminants, it may not produce a strong enough spark to ignite the fuel in the engine. This can lead to difficulty starting the snowblower or even prevent it from starting altogether. By keeping the spark plug clean, you can avoid these frustrating starting problems and ensure that your snowblower is always ready to go when you need it.

Extend plug life

Regularly cleaning the spark plug can help extend its life. When the spark plug is dirty or clogged, it has to work harder to produce a spark. This can lead to increased wear and tear on the electrode and insulator, potentially shortening the lifespan of the plug. By cleaning the spark plug regularly, you can remove any contaminants that may be causing premature wear and extend the overall life of the plug.


Before you begin cleaning the spark plug on your snowblower, there are a few steps you should take to ensure your safety and make the process easier.

Turn off the snowblower

First and foremost, turn off your snowblower and make sure the engine is completely shut down. This will prevent any accidental starts and keep you safe while working on the spark plug.

Allow the engine to cool

Next, allow the engine to cool down. The spark plug and surrounding areas can become very hot during operation, so it’s important to give it enough time to cool off before attempting to remove the spark plug.

Gather necessary tools

Lastly, gather the necessary tools for the job. You will need a socket wrench or spark plug socket, a wire brush, and possibly a pair of pliers or spark plug boot puller to disconnect the spark plug wire. Having these tools on hand will make the process much easier and more efficient.

Removing the spark plug

Once you have properly prepared, it’s time to remove the spark plug from your snowblower. Here’s how:

Locate the spark plug

The spark plug is typically located on the side of the engine, near the cylinder head. Refer to your snowblower’s manual or look for a small, cylindrical component with a wire attached to it. This is the spark plug.

Disconnect the spark plug wire

Using a pair of pliers or a spark plug boot puller, gently grasp the spark plug wire and pull it away from the spark plug. Be careful not to pull on the wire itself, as this can damage it. Instead, focus on gripping the boot or connector and pulling straight back.

Remove the spark plug

With the spark plug wire disconnected, use a socket wrench or spark plug socket to loosen and remove the spark plug from the engine. Turn the wrench or socket counterclockwise to loosen it and then remove it by hand. Set the spark plug aside in a clean, safe place.

How Do I Clean The Spark Plug On My Snowblower?

Inspecting the spark plug

Now that the spark plug is removed, it’s time to inspect it for any signs of damage or wear. This inspection will help you determine if cleaning is necessary or if the spark plug needs to be replaced.

Examine the spark plug

Take a close look at the spark plug. Look for any signs of damage, such as cracks or chips in the ceramic insulator or electrode. Additionally, check for any excessive carbon deposits or oil fouling on the spark plug. These can indicate other issues with the engine that may need to be addressed.

Check for signs of damage

Inspect the electrode and center electrode, looking for signs of wear or erosion. The electrode should have a flat, smooth surface, and the spark plug should have a consistent gap between the electrodes. If you notice any irregularities, such as a worn-down electrode or a widened gap, it may be time to replace the spark plug.

Assess the electrode condition

The condition of the electrode can tell you a lot about the performance of your snowblower’s engine. If the electrode is covered in black, oily deposits, it could indicate rich fuel mixture or oil burning issues. On the other hand, a white, powdery residue may suggest a lean fuel mixture. Take note of any unusual conditions and consider adjusting the fuel mixture or seeking further professional assistance if necessary.

Cleaning the spark plug

If you determine that the spark plug is dirty but still in good condition, cleaning it can help restore optimal performance. Here’s how to clean the spark plug effectively:

Use a wire brush

Start by using a wire brush to carefully scrub away any carbon deposits or other contaminants from the spark plug. Gently brush the electrode, insulator, and the threaded portion of the plug to remove any built-up residue. Be thorough but gentle to avoid damaging the spark plug.

Avoid using abrasive material

It’s important to note that using abrasive material, such as sandpaper or a metal pick, can damage the electrode or insulator. Stick to a soft-bristled wire brush to minimize the risk of causing any harm while cleaning.

Clean the electrode and insulator

Pay particular attention to the electrode and insulator, as these are the areas that directly affect the spark plug’s performance. Cleaning off any carbon deposits or other contaminants will improve the spark plug’s efficiency and reliability.

Reinstalling the spark plug

After the spark plug is clean, it’s time to reinstall it in the snowblower’s engine. Follow these steps to ensure proper installation:

Apply anti-seize compound

Before reinstalling the spark plug, apply a small amount of anti-seize compound to the threads. This will help prevent the spark plug from seizing or becoming difficult to remove in the future.

Hand tighten the spark plug

Using your fingers, carefully thread the spark plug back into the engine. Start by turning it clockwise to ensure it is properly aligned with the threads. Once it is threaded in snugly, use a socket wrench or spark plug socket to hand tighten the spark plug. Be careful not to overtighten, as this can damage the spark plug or the engine.

Reconnect the spark plug wire

Finally, reconnect the spark plug wire by sliding the boot or connector back onto the spark plug until it clicks into place. Make sure it is securely attached to prevent any loose connections that could affect the spark plug’s performance.

Testing the spark plug

After completing the cleaning and reinstallation process, it’s important to test the spark plug to ensure it is working correctly. Here are two tests you can conduct:

Check for spark

With the spark plug wire reconnected, position the spark plug near a grounded metal surface, such as the engine block. Pull the starter cord or engage the electric starter to cranking the engine while observing the spark plug. If you see a strong, blue spark jumping across the electrodes, it indicates that the spark plug is functioning properly.

Conduct spark plug resistance test

If you suspect that the spark plug may still be faulty even after cleaning, you can perform a spark plug resistance test using a multimeter. Set the multimeter to the resistance or ohms mode and attach the leads to the metal terminal and the threaded portion of the spark plug. If the multimeter displays a resistance reading within the manufacturer’s specifications, the spark plug is likely in good condition. If not, it may be time to consider replacing the spark plug.

Maintaining the spark plug

Regular maintenance is crucial to ensuring the longevity and optimal performance of the spark plug. Here are some key maintenance tips:

Regular cleaning schedule

Make it a habit to clean the spark plug on a regular basis, especially if you frequently use your snowblower or notice any signs of fouling or carbon deposits. A routine cleaning schedule will help prevent any buildup and ensure consistent performance.

Using fuel additives

Fuel additives, such as fuel stabilizers or cleaners, can also help maintain the cleanliness of your spark plug. These additives can help remove deposits and prevent carbon buildup, resulting in a cleaner and more efficient spark plug.

Replacing the spark plug

Despite regular cleaning and maintenance, spark plugs do have a limited lifespan. If you notice that the spark plug is wearing out, damaged, or not performing optimally even after cleaning, it may be time to replace it. Consult your snowblower’s manual or a professional technician for guidance on selecting the right spark plug for your specific engine model.

Common spark plug problems

Understanding common spark plug problems can help you identify issues and take appropriate action. Here are a few problems you may encounter:


Spark plug fouling occurs when carbon deposits build up on the electrode, insulator, or both. This can happen due to a rich fuel mixture, oil burning issues, or excessive idling. Fouling can lead to starting difficulties, poor engine performance, and even misfires. Regular cleaning and adjusting the fuel mixture can help prevent and address fouling issues.

Carbon deposits

Carbon deposits can accumulate on the spark plug over time, especially if the fuel-air mixture is not properly balanced. These deposits can interfere with the spark plug’s ability to generate a strong spark, resulting in reduced engine performance and starting issues. Cleaning the spark plug regularly can help minimize carbon deposits and maintain optimal performance.

Worn electrodes

Over time, the electrode on the spark plug can wear down or erode, affecting its ability to generate a strong spark. Symptoms of worn electrodes include misfires, reduced engine performance, and difficulty starting the snowblower. If the electrode is significantly worn or damaged, it’s recommended to replace the spark plug to restore optimal performance.


Cleaning the spark plug in your snowblower is a simple yet important maintenance task that can greatly benefit the performance and longevity of your machine. By following the proper steps outlined in this article and maintaining a regular cleaning schedule, you can ensure that your snowblower’s spark plug continues to deliver that strong, reliable spark necessary for smooth operation. Keep in mind the importance of proper preparation, thorough inspection, and appropriate cleaning techniques to maximize the effectiveness of your spark plug maintenance routine.