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Lawn Mower Spark Plug, 25 Things You Should Know

When maintaining a healthy lawn, your mower’s spark plug ensures efficient performance. However, most people tend to overlook the importance of this small yet vital component. Fear not, as I hold the key to unraveling the mysteries surrounding the lawn mower spark plug, guiding you toward a smooth and trouble-free mowing experience.

Lawn mower spark plug:

A lawn mower’s spark plug is an essential component of its internal combustion engine, responsible for igniting the air-fuel mixture within the engine’s combustion chamber. Spark plugs come in copper, iridium, and platinum types, each offering different benefits. Regular maintenance and replacement, about every 100 hours of use or at least once per season, ensure optimal engine performance and prolong the life of your lawn mower.

Curious about lawn mower spark plugs and how they impact your mower’s performance? Read on for exclusive insights on their functions, types, maintenance tips, and even troubleshooting hacks!

Don’t miss out on expert advice to make your mowing experience smoother than ever!


Lawn Mower Ignition Spark Plug

The Importance of the Spark Plug in Lawn Mowers

The spark plug is a crucial component of a lawn mower’s internal combustion engine. This small but mighty device is responsible for igniting the air-fuel mixture within the engine’s combustion chamber, ultimately providing the power needed to operate the lawn mower.

Without a properly functioning spark plug, your lawn mower’s engine may run inefficiently or not start at all.

To maintain optimal performance and extend the life of your lawn mower, it’s essential to understand the various aspects of spark plug maintenance, including selecting the right spark plug, knowing when to replace it, and learning how to do it yourself.

Types of Lawn Mower Spark Plugs

Several types of spark plugs are suitable for lawn mowers, and selecting the right one depends on your specific engine. In general, lawn mower spark plugs can be categorized into three types:

  • Copper Core Spark Plugs: These spark plugs are ideal for older lawn mower models and are often more affordable. Their primary drawback is a shorter lifespan compared to other types.
  • Iridium Spark Plugs: Known for their durability and performance, iridium spark plugs typically last longer than copper ones, making them a popular choice for modern lawn mowers.
  • Platinum Spark Plugs: While slightly pricier than copper and iridium spark plugs, platinum versions balance performance and longevity.

It’s essential to consult your lawn mower’s owner’s manual to determine the specific spark plug type and gap setting required for your engine.

When to Replace Your Lawn Mower Spark Plug

Regularly replacing your lawn mower’s spark plug is key to ensuring proper engine performance. Generally, replacing the spark plug after every 100 hours of use is recommended, or at least once per season.

However, there are specific signs that may indicate it’s time to replace the spark plug sooner, such as:

  • Difficulty Starting: If your lawn mower is becoming increasingly difficult to start or fails to start altogether, it may be due to a worn or fouled spark plug.
  • Increased Fuel Consumption: A degraded spark plug may reduce fuel efficiency, meaning your lawn mower uses more fuel to accomplish the same task.
  • Poor Performance: If your lawn mower’s engine is running rough, hesitating, or lacking power, the spark plug may be to blame.

Paying attention to these warning signs and replacing the spark plug when necessary can prevent more severe engine problems and costly repairs.

How to Replace Your Lawn Mower Spark Plug

With basic tools and some know-how, replacing your lawn mower’s spark plug is straightforward. Follow these simple steps:

  1. Disconnect the Spark Plug Wire: Before starting any work, ensure the lawn mower is turned off and the spark plug wire is disconnected from the plug to prevent accidental engine startup.
  2. Remove the Old Spark Plug: Using a spark plug socket and wrench, gently turn the plug counterclockwise to loosen and remove it.
  3. Inspect the Old Spark Plug: Check the old spark plug’s electrodes for signs of wear or damage. Heavy carbon deposits, eroded electrodes, or cracks in the porcelain insulator are all indicators that the plug should be replaced.
  4. Prepare the New Spark Plug: Before installing the new spark plug, verify that the gap between the center and ground electrodes is within the manufacturer’s recommended range. An appropriate spark plug gap tool can be used to adjust the gap if necessary.
  5. Install the New Spark Plug: With the correct gap setting confirmed, thread the new spark plug into the engine by hand. Then, using the spark plug socket and wrench, tighten the plug until snug, taking care not to over-tighten it to avoid damaging the threads.
  6. Reconnect the Spark Plug Wire: Once the new spark plug is securely in place, reconnect the spark plug wire to complete the replacement process.

Tips for Lawn Mower Spark Plug Maintenance

In addition to replacing your lawn mower’s spark plug when needed, proper spark plug maintenance can help prolong its life and improve overall engine performance. Consider these helpful tips:

  • Clean the Spark Plug: Periodically remove the spark plug and gently clean any deposits from its electrodes using a wire brush. Cleaning the spark plug can help maintain optimal engine performance and fuel efficiency.
  • Check the Gap Regularly: Even if you’re not replacing the spark plug, it’s a good idea to check the gap setting at least once per season. This ensures the spark plug is functioning correctly and efficiently.
  • Avoid Over-Tightening: When installing a new spark plug or reinserting an existing one, take care not to over-tighten the plug. Excessive force can lead to damaged threads or even a cracked porcelain insulator.

By taking these simple steps to maintain your lawn mower’s spark plug, you can help ensure your engine operates consistently, efficiently, and reliably throughout its lifetime.

Do All Lawn Mower Spark Plugs Share the Same Characteristics?

As a homeowner with a lawn, ensuring that your lawn mower is in top-notch condition is essential to its longevity and overall performance. One component that plays a crucial role in your mower’s performance is the spark plug.

But are all lawn mower spark plugs the same? The short answer is no; not all spark plugs are the same. They differ in size, material, heat range, and more.

Various Sizes and Types of Spark Plugs

Spark plugs come in various sizes, depending on the make and model of your lawn mower. Some common sizes include 14mm, 12mm, 10mm, and 8mm thread diameters. Also, spark plugs can be classified into two main types: resistor and non-resistor types.

– Resistor Type Spark Plugs

Resistor-type spark plugs include a resistor within the plug to reduce radio frequency interference (RFI) generated by the ignition system. This prevents interference with electronic devices and improves the overall performance of the ignition system.

Most modern lawnmowers use resistor-type spark plugs.

– Non-Resistor Type Spark Plugs

Non-resistor type spark plugs, also known as traditional plugs, do not contain a resistor to suppress RFI. These plugs are typically found in older lawn mowers or those with simple ignition systems.

Material Differences in Spark Plugs

Another factor that sets spark plugs apart is their material composition. The most common materials used in spark plug construction are copper, platinum, and iridium. Each type offers different benefits.

– Copper Core Spark Plugs

Copper-core spark plugs are the most common and inexpensive option available. They have excellent heat transfer capabilities but wear out quicker than their platinum and iridium counterparts.

Copper plugs are best suited for older lawn mowers with low-voltage distributor-based ignition systems.

– Platinum Spark Plugs

Platinum spark plugs are more durable and long-lasting than copper plugs due to their platinum disc welded to the center electrode. These plugs resist gap erosion, which maintains the ideal gap and improves the overall performance of the ignition system.

Platinum plugs are commonly found in modern lawnmowers that require extended maintenance intervals.

– Iridium Spark Plugs

Iridium spark plugs are the most expensive option but offer the best performance and lifespan. Iridium plugs have a fine wire center electrode, which allows for a smaller, more focused spark that improves combustion and power output.

Iridium plugs are ideal for high-performance lawnmowers or those requiring minimal maintenance.

Heat Range in Spark Plugs

Spark plugs are available in different heat ranges, which determines how efficiently the plug can dissipate heat. The right heat range is essential in avoiding plug fouling, pre-ignition, or engine damage.

A spark plug’s heat range can generally be identified by part number or by consulting your mower’s owner’s manual.

  • Cold spark plugs dissipate heat quickly and are typically used in high-performance engines or engines with high combustion chamber temperatures.
  • Hot spark plugs have a greater insulator length that retains heat, which burns off deposits more effectively. These plugs are suitable for engines with low combustion chamber temperatures, such as small lawn mowers.

Choosing the Right Spark Plug for Your Lawn Mower

Before you purchase a spark plug, it’s essential to consult your mower’s owner’s manual or speak to a professional to ensure compatibility. Replacing the spark plug with an incorrect type can lead to damage or poor performance.

The following factors should be considered when selecting the appropriate spark plug for your lawn mower:

  1. Thread size and reach: Ensure the spark plug fit your lawn mower’s engine.
  2. Resistor type: Choose between resistor or non-resistor type plugs based on your mower’s requirements.
  3. Material: Select a material based on your budget and performance needs.
  4. Heat range: Choose the appropriate heat range as your mower’s specifications recommend.

By considering the factors outlined in this article, you’ll be on your way to selecting the perfect spark plug for your lawn mower. Armed with this knowledge, you can decide on the right spark plug for your specific requirements.

For further assistance, consult resources such as The Spark Plug Guide by Oregon State University for detailed information on spark plug functions and types.

How can I determine the appropriate spark plug for my lawn mower?

A lawn mower is essential for maintaining a beautiful and neat lawn. The engine’s spark plug plays a crucial role in ensuring that the mower runs smoothly and efficiently.

When it’s time for a replacement, choosing the right spark plug for your lawn mower is vital to maintaining optimum performance.

Types of Spark Plugs

Lawnmower engines typically utilize small-engine spark plugs, which come in two main types: resistor and non-resistor. The main difference is that resistor spark plugs have a ceramic resistor chip within the center electrode, which helps reduce electromagnetic interference.

Non-resistor spark plugs, on the other hand, do not have this chip. Most engines are designed to work with a specific type of spark plug, so knowing which one your lawn mower requires is essential.

Understanding Lawn Mower Spark Plug Measurements

Spark plugs have two primary measurements: the heat range and the thread size. The heat range of a spark plug refers to its ability to dissipate heat from the combustion chamber. A higher number indicates a hotter plug, while a lower number means a cooler plug.

The thread size (measured in millimeters) refers to the diameter and length of the spark plug’s threads. Knowing these measurements is essential for selecting the correct spark plug for your lawn mower.

– Heat Range

Selecting a spark plug with the appropriate heat range is essential for maintaining proper engine operation. A spark plug that’s too hot can cause overheating, leading to engine damage, while a spark plug that’s too cold can cause fouling and poor performance.

Consult your owner’s manual or consult with a qualified mower service technician to determine the proper heat range for your lawn mower’s engine.

– Thread Size and Reach

The correct thread size and reach are crucial to maintaining an adequate seal within the engine’s combustion chamber. Using a spark plug with an incorrect thread size can lead to pressure leaks and engine damage.

To find the appropriate thread size and reach, consult your lawn mower’s owner’s manual or ask a knowledgeable technician.

Identifying Your Lawn Mower’s Spark Plug

Every lawn mower engine has an OEM (Original Equipment Manufacturer) spark plug recommendation. The operator’s manual provided with your lawn mower usually contains this information.

If you don’t have the manual, you can typically find this data on the engine itself by locating the model and type number.

In addition to OEM recommendations, many popular spark plug manufacturers such as NGK, Champion, and Bosch offer cross-reference guides. These guides help identify aftermarket spark plug options matching your mower’s original specifications.

Remember that you should always cross-reference with your owner’s manual to ensure you’re using the proper spark plug.

Installation Tips

When installing a new spark plug, following proper installation procedures is essential. Here are some helpful tips to ensure a successful replacement:

  1. Before removing the old spark plug, clean the area around it to prevent any debris from falling into the engine’s combustion chamber.
  2. Use a spark plug socket wrench with the appropriate size to remove the old spark plug. Turn the wrench counterclockwise to loosen and remove it.
  3. Before installing the new spark plug, check the gap between the center and ground electrode using a gap tool or feeler gauge. The correct gap specifications can be found in your lawn mower’s owner’s manual.
  4. Apply a small amount of anti-seize compound to the new spark plug’s threads, avoiding the electrode. This will help prevent the plug from seizing within the engine.
  5. Hand-thread the new spark plug into the engine until it’s finger-tight. Then, use a torque wrench to tighten the plug to the manufacturer’s recommended torque specifications. Over-tightening can cause damage to the engine, while under-tightening can result in pressure leaks.


Knowing which spark plug to use in your lawn mower is crucial for optimum performance and engine health.

By understanding the types of spark plugs available, the appropriate heat range and thread size, and following proper installation procedures, you can ensure a smoother running engine and a well-maintained lawn.

For more information on selecting the right spark plug for your particular mower, you can visit the Briggs and Stratton resource center, which offers a wealth of information and resources for understanding and maintaining small engines, including lawnmowers.

What is the recommended frequency for changing spark plugs on a lawn mower?

Every lawn mower owner knows that regular maintenance is key to ensuring the machine’s long and efficient life. One critical component that requires attention is the spark plug.

While many people overlook this small part, it plays a vital role in starting the engine and running smoothly.

Understanding the Importance of Spark Plugs

Spark plugs are responsible for producing the spark needed to ignite the fuel and air mixture in the engine’s combustion chamber. This, in turn, creates the explosion that powers the engine and allows your lawn mower to function.

Without a properly functioning spark plug, your lawn mower may experience difficulty starting or have reduced power while cutting. It may also result in frequent stalling or even cause damage to other engine components if left unchecked.

The Lifespan of Spark Plugs

Different types of spark plugs have varying lifespans, which are influenced by factors such as the type of lawn mower, its usage, and the conditions it operates in.

For example, lawnmowers used for commercial purposes or in harsh environments typically require more frequent spark plug replacements.

In general, lawnmower plugs fall into two categories: standard spark plugs and long-life spark plugs.

– Standard Spark Plugs

Most lawn mowers come equipped with standard spark plugs. These plugs typically have a shorter lifespan, usually around 30-50 hours of mower operation. In this case, it’s a good idea to check and clean the spark plug after every 25 hours of usage.

However, professionals with experience may recommend checking and cleaning spark plugs even more frequently, especially if you mow your lawn often or your lawn mower is subjected to demanding conditions.

– Long-Life Spark Plugs

Long-life spark plugs, primarily made of iridium or platinum, last longer than standard spark plugs. These types of plugs can last between 60-120 hours of mower operation.

While they may cost more upfront, their extended lifespan and improved performance make them a worthwhile investment for many lawn mower owners.

If your lawn mower uses long-life spark plugs, it’s still a good idea to check and clean them after 50 hours of usage.

Signs It’s Time to Replace Your Spark Plug

While the recommended intervals for checking and cleaning spark plugs are useful guidelines, they should not override your judgment when deciding whether to replace the spark plug. Below are some common signs that indicate it may be time to replace your lawn mower’s spark plug:

  1. Difficulty Starting the Engine: If your lawn mower struggles to start or requires multiple attempts to turn on, this is often an indication that your spark plug may be worn and require replacement.
  2. Decreased Power and Performance: If your lawn mower isn’t running as smoothly as it should or is continually stalling, it’s possible that the spark plug is not performing optimally and needs replacement.
  3. Physical Damage: If the spark plug’s electrodes are visibly worn, damaged, or fouled with carbon deposits, it’s time for a replacement.

How to Change the Spark Plug on a Lawn Mower

Changing the spark plug on a lawn mower is a relatively simple process that most people can do. Follow these easy steps:

  1. Find the owner’s manual for your lawn mower to identify the correct replacement spark plug type and gap size.
  2. Ensure the lawn mower is switched off and has cooled down completely to avoid burns from hot engine parts.
  3. Disconnect the spark plug wire by pulling it gently away from the spark plug.
  4. Use a spark plug wrench or socket to loosen and remove the old spark plug.
  5. Check and set the gap size of the new spark plug using a spark plug gap gauge.
  6. Hand-tighten the new spark plug into the engine, ensuring not to over-tighten.
  7. Reconnect the spark plug wire to the new spark plug.
  8. Start your lawn mower to ensure the new spark plug is working correctly.

By following these simple steps and regularly checking your spark plug, you can ensure your lawn mower performs optimally throughout its lifespan.

To learn more about lawn mower maintenance, visit for a comprehensive guide on lawn mower maintenance.

Lawn Mower Type
Spark Plug Change Frequency
Walk-Behind Lawn Mowers
Every 50-100 hours or once per season
Riding Lawn Mowers
Every 100 hours or once per season
Robot Lawn Mowers
Consult the owner’s manual

What are the Indications of a Malfunctioning Spark Plug in a Lawn Mower?

Like any other equipment with an internal combustion engine, lawnmowers rely on spark plugs to ignite the air-fuel mixture in the cylinder. A well-functioning spark plug is vital for the smooth operation of your lawn mower.

However, over time, spark plugs can wear out or become damaged, leading to poor performance or even a complete failure to start.

Difficulty Starting the Lawn Mower

One of the most common symptoms of a bad spark plug is difficulty starting the lawn mower. If the spark plug isn’t functioning correctly, there may be inconsistent or weak sparks, resulting in the lawn mower failing to ignite the air-fuel mixture in the cylinder.

You might find that you need to repeatedly pull the starter cord, or it may take much longer than usual for the engine to fire up.

In some cases, a lawn mower with a bad spark plug might not start at all. If you have ruled out other probable causes, such as low fuel or a dead battery, it’s worth inspecting and potentially replacing the spark plug.

Rough or Unsteady Engine Performance

Another symptom of a bad spark plug is an uneven, rough, or “miss” in the engine’s performance. When the spark plug isn’t properly igniting the air-fuel mixture, it can cause an imbalance in the engine’s combustion process.

This could manifest as the lawn mower sounding and feeling rough when running, struggling to maintain a consistent RPM, or even stalling during operation.

Reduced Power and Efficiency

A poorly functioning spark plug can also cause a noticeable drop in power and efficiency from the lawn mower’s engine. As the spark plug’s performance declines, it might not be able to provide a strong or consistent spark, leading to incomplete combustion of the air-fuel mixture.

This may result in reduced power output, diminished fuel efficiency, and increased emissions.

If you notice that your lawn mower isn’t cutting as effectively or seems to be working harder than usual to accomplish the same task, a faulty spark plug could be the culprit.

Excessive Fuel Consumption

Since a bad spark plug can compromise the engine’s combustion process, it can also lead to increased fuel consumption. When the spark plug isn’t igniting the air-fuel mixture effectively, the engine must compensate by using more fuel to maintain its operation.

This could translate to your lawn mower running out of fuel more quickly than usual or requiring more frequent refueling.

Fouled or Damaged Spark Plug

If you suspect a bad spark plug, inspecting and assessing its condition is essential. Spark plugs can become fouled with fuel, oil, or carbon deposits, which can interfere with their ability to create a proper spark.

Visual signs of a fouled or damaged spark plug include sooty or oily deposits, pitted or eroded electrodes, or a cracked insulator.

Additionally, the spark plug’s gap – the distance between the center and side electrodes – should be checked and compared to the manufacturer’s specifications.

How to Resolve the Issue

If you have identified one or more symptoms of a bad spark plug, the first step is to inspect the spark plug and assess its condition. In some cases, you can clean a fouled spark plug and adjust the gap to restore its performance.

However, if the spark plug is damaged or shows signs of significant wear, replacing it with a new one is best.

Replacing a spark plug is a relatively straightforward and inexpensive maintenance task that can significantly improve your lawn mower’s performance and extend its lifespan.

For more information on lawn mower maintenance and spark plug specifications, consult your lawn mower’s owner’s manual or visit reputable resources such as the Small Engine Repair Reference Center provided by the Ebscohost organization.

In conclusion, a bad spark plug in a lawn mower can lead to a range of performance issues, including difficult starting, rough or unsteady engine operation, reduced power and efficiency, and increased fuel consumption.

Regularly inspecting and maintaining your lawn mower’s spark plug can help prevent these issues and ensure optimal performance from your equipment.

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  1. Debbie Anderson says:

    What signs should I look out for that indicate my spark plug needs immediate replacement?

    • Allard Vdhooft says:

      To Debbie Anderson: Signs of a faulty spark plug include difficulty starting, rough engine performance, reduced power, fuel inefficiency, and visual damage. Regular replacement, about every 100 hours or season, is crucial.

  2. Roberta Olson says:

    I found the information on spark plug maintenance to be very useful and easy to understand.

    • Allard Vdhooft says:

      I’m glad you found the information on spark plug maintenance helpful, Roberta! Feel free to reach out if you have any more questions or need further guidance. Happy mowing!

  3. Kirk Ramirez says:

    I never knew there were different types of spark plugs for lawn mowers, thank you for the explanation.

    • Allard Vdhooft says:

      Glad you found the information helpful! Feel free to reach out if you have any more questions about lawn mower maintenance. Happy mowing!

  4. Diana Butler says:

    The explanation on how different materials in spark plugs affect performance was enlightening.

    • Allard Vdhooft says:

      Thank you, Diana! I’m glad you found the explanation enlightening. Feel free to reach out if you have any more questions about spark plugs or lawn mower maintenance.

  5. Matthew Richards says:

    This article has really opened my eyes to the significance of spark plugs in lawn mower maintenance.

    • Allard Vdhooft says:

      Thank you, Matthew! I’m glad the article shed light on the importance of spark plugs in lawn mower maintenance for you. Here’s to smooth mowing experiences ahead!

  6. Jessie Baker says:

    As a beginner, this article was incredibly helpful in understanding the importance of lawn mower spark plugs. Thank you for simplifying this topic and providing valuable maintenance tips!

    • Allard Vdhooft says:

      Thank you, Jessie! I’m glad you found the article helpful. Happy mowing!

  7. Logan Carlson says:

    The video links provided were a great addition to the article, visual demonstrations are always helpful.

    • Allard Vdhooft says:

      “Thank you, Logan! I’m glad you found the video links helpful in understanding the importance of the lawn mower spark plug. Stay tuned for more insightful content!”

  8. Duane Jimenez says:

    Can using the wrong spark plug type damage my lawn mower’s engine?

    • Allard Vdhooft says:

      Yes, using the wrong spark plug type can damage your lawn mower’s engine. It’s crucial to choose the correct plug for optimal performance and prevent potential damage.

  9. Patrick Chapman says:

    Are there any tools or products recommended for cleaning spark plugs effectively?

    • Allard Vdhooft says:

      For cleaning spark plugs effectively, consider using a wire brush to remove deposits. Remember to replace them every 100 hours or at least once per season for optimal performance.

  10. Neil Silva says:

    Great advice on when to replace the spark plug, I’ll make sure to keep an eye out for those signs.

    • Allard Vdhooft says:

      Thank you, Neil! I’m glad you found the advice helpful. Let me know if you need any more tips on maintaining your lawn mower spark plug for top-notch performance!

  11. Aubrey Cole says:

    Thank you for breaking down the different types of spark plugs for lawn mowers, it was easy to follow!

    • Allard Vdhooft says:

      Thank you for your kind words! I’m glad you found the information helpful. If you have any more questions or need further assistance, feel free to reach out. Happy mowing!

  12. Albert Harrison says:

    Does the brand of spark plug make a significant difference in performance?

    • Allard Vdhooft says:

      Yes, the brand of spark plug can significantly affect your lawn mower’s performance. Selecting the right type and maintaining it properly can enhance efficiency and prolong the engine’s life.

  13. Roberto Diaz says:

    What are the benefits of using platinum spark plugs over copper ones?

    • Allard Vdhooft says:

      Platinum spark plugs offer enhanced durability and performance compared to copper ones, making them a valuable investment for your lawn mower’s engine. Maintenance is crucial for optimal performance and longevity.

  14. Ethan Peck says:

    Is there a specific way to dispose of old or damaged spark plugs?

    • Allard Vdhooft says:

      To Ethan Peck: Old or damaged spark plugs can be recycled at auto parts stores or hazardous waste disposal facilities. It’s essential to dispose of them properly to prevent environmental harm.

  15. Alma Cunningham says:

    Are there any safety precautions I should follow when replacing the spark plug?

    • Allard Vdhooft says:

      Dear Alma Cunningham, when replacing the spark plug on your lawn mower, remember to disconnect the spark plug wire first to prevent the engine from starting accidentally. Always check the owner’s manual for specifics. Best of luck with your maintenance!

  16. Noah Frazier says:

    Can cleaning a spark plug extend its lifespan, or is replacement always necessary?

    • Allard Vdhooft says:

      Regular maintenance is key to extending the spark plug’s lifespan. However, signs of wear or poor performance may indicate replacement is necessary for optimal engine function.

  17. Nicholas Ward says:

    I never realized how important the spark plug was until reading this article, thank you for the insight.

    • Allard Vdhooft says:

      “Glad you found the article helpful, Nicholas! Remember, a well-maintained spark plug is key to a smoothly running mower. Happy mowing!”

  18. Glen Webb says:

    I appreciate the tips on how to maintain the spark plug, it’s very informative.

    • Allard Vdhooft says:

      Thank you, Glen! I’m glad you found the tips on maintaining the spark plug informative. Your support means a lot!

  19. Tristan White says:

    The step-by-step guide on how to replace the spark plug is very practical and helpful.

    • Allard Vdhooft says:

      Thank you, Tristan! I’m glad you found the guide helpful. Feel free to reach out with any questions about maintaining your lawn mower spark plug.

  20. Deann Morris says:

    How often should I clean the spark plug to ensure optimal performance?

    • Allard Vdhooft says:

      To ensure optimal performance, clean your spark plug every 25-50 hours or once per season. Regular maintenance is key to a smooth mowing experience.

  21. Frank Ruiz says:

    How do I know if the spark plug in my lawn mower needs to be replaced?

    • Allard Vdhooft says:

      To determine if your lawn mower’s spark plug needs replacement, look for signs of difficulty starting, decreased power, or increased fuel consumption. Regular maintenance every 100 hours or once per season ensures optimal performance.