How frequently should I change my lawn mowers spark plugs. Honda lawnmower spark plug

14.06.2023 Boath change, frequently, lawn, mowers, spark

How frequently should I change my lawn mowers spark plugs?

NO! This is a common misconception, below is what you need to know.

With so many factors to maintain your lawnmower properly, it can quickly become overwhelming.

And one of the many questions you may face while maintaining your lawnmower is how often should you change your spark plugs?

This is crazy, but we found out that there is a lot of misinformation on how often spark plugs need to be replaced.

So naturally, we did some digging, and we also reached out to some lawn care pros to ask them what they think.

Below you will find EVERYTHING you need to know about how often you should be replacing your mower’s spark plugs.

In a nutshell: How often should lawn mower spark plugs be replaced?

In short: As a rule of thumb, the average homeowner should be ok if they change their spark plugs out once a year.

The same is true of all your lawn care equipment in general, including commercial weedeaters.

Here’s the deal, most websites appear to recommend that you should replace your spark plugs every 25 to 30 hours of operation.

THIS IS WRONG!

Get this, the lawn care professionals we spoke with had something entirely different to say.

With well over 50% suggesting that they only replace their spark plugs ONLY once a year.

Which would suggest that spark plugs operate efficiently for much longer than other mainstream sources suggest.

But we will cover that more in a minute.

Why do I need to change the spark plugs in my lawnmower?

Think about it, as the ignition source for your lawn mower’s fuel. Your spark plugs create a spark 1000’s times during the process of cutting your lawn.

And during the process of igniting fuel over and over and over. Your spark plugs can get deposits built upon them and they will eventually become too corroded to ignite fuel efficiently.

Other potential reasons you are spark plugs may need to be replaced include:

Whatever the case, your spark plugs should be changed on a regular basis to prevent efficient lawn mower operation. This is simply a part of proper lawn care.

But how often should you change your spark plugs?

What is the industry standard?

Here’s the deal, for one reason or another, most sites recommend changing your lawnmower’s spark plug every 25-30 hours.

While I am not sure why this misconception has taken over, it may be due to this article by Briggs and Stratton.

The article states that you should “check and/or replace” your spark plug every 25 hours.

Somehow the ‘check and/or” part got overlooked in other articles who mistake that “the life of a spark plug is 25 hours”Source

However, in all fairness, the Google Search result is a bit misleading, and shows why a deeper investigation into search results is a must!

However, one has to wonder…

Is Briggs and Stranton intentionally misleading consumers to make more spark plug sales?

Look in my experience, spark plugs last 100’s of hours… easily. Changing your spark plugs out every 25 hours is way too frequent.

However, it’s difficult to come up with a better number on our own. So we reached out to other lawn care pros to see what they recommend.

Here is what they had to say.

What do the lawn care pros say about replacing a spark plug on lawn care equipment?

Across the board, the resounding response from lawn care providers was that they changed their spark plugs annually. With 64% reporting to us that they only changed their spark plugs once a year.

This number suggests that spark plugs last MUCH longer than 25 hours.

Think about it we are talking about lawn care professionals. So if they run their mower for a minimum of 20 hours a week for 39 weeks of the year for example. That means spark plugs easily last over 780 hours before needing to be replaced.

What did the rest of the lawn care professionals say about changing their spark plugs?

Well, the second most popular response we received was 30% of lawn care pros stating they NEVER change their spark plugs.

Finally, 3% of lawn care providers said they changed their spark plugs after the ‘recommended’ 25-30 hours of use, and another 3% reported to us that they swap spark plugs out on a monthly basis.

Remove Spark Plugs Regularly to Prevent Seizing

Look, whether your spark plug ignites the fuel or not is one thing. But one huge issue that can occur when your spark plugs are not maintained is seizing.

Here’s the deal, a bad spark plug isn’t a huge problem, but a seized spark plug can be a major headache. And could potentially cause other problems down the road.

Spark plugs can seize inside the engine block if they are left in too long, or improperly installed.

So, even if your spark plugs are still good, you want to be sure to remove them annually and add an anti-seize agent at the very least.

Spark Plug Maintenance at the End of the Day

Simply put, if you are a homeowner you probably can’t go wrong changing out your lawnmowers spark plugs annually.

Most homeowners use their lawnmowers well over 30 hours annually. So it simply makes sense to swap out your spark plugs on an annual basis.

On the other hand, if you are a lawn care pro, only changing your spark plugs once a year may not be enough. And you do risk sacrificing your lawnmower’s performance by not changing your spark plugs frequently enough.

While it’s a fair assumption that changing out your spark plugs weekly is a bit overkill. You may want to consider changing your spark plugs on a monthly basis if you are a lawn care vendor.

But the reality is, your mowers spark plug goes mad, it’s not a difficult fix. At least if you happen to carry spares on hand.

Want more to read? Check out this article on how to winterize your lawn care equipment.

Hi, I’m Gene Caballero and I’m the co-founder of GreenPal. At GreenPal, we’re helping hundreds of thousands of Americans solve one of the trickiest problems: a reliable, fast, and affordable way to get lawncare taken care of. On behalf of GreenPal, I’ve been featured in the Indianapolis Star. the Sacramento Bee. Entrepreneur. Inc.com. and dozens more. Please feel free to say hi on or connect with me on LinkedIn.

Lawn Mower Spark Plugs VS Car Spark Plugs – Are They Same?

Spark plug, tiny yet mighty, is one of the essential parts of the engine, especially for the ignition system. Your lawn mower starts when the spark plug ignites the air-fuel mixture. It produces the electricity required to create an ignition.

Are lawn mower spark plugs same as car spark plugs?

Probably not. Whether you can use car mower spark plugs for your lawnmower depends on several factors: heat range, thread type, model, size, and other physical differences. On top of that, the functionality of spark plugs is not 100% the same though many of them may have a similar physical appearance.

Are Lawn Mower Spark Plugs Same As Car Spark Plugs?

A spark plug is a common yet essential part of lawnmowers and automobiles, which helps power and start the vehicle through the ignition system.

Though lawn mower spark plugs and car spark plugs have the same functions, experts recommend not using them unless they meet some crucial specifications.

However, you have no problem using car spark plugs for your lawnmower if they are interchangeable.

Thread Size

The first common difference you will notice is the different tread sizes between lawn mower engines and car engines.

As car engines are at least slightly bigger, they have 14-millimeter thread. On the contrary, many lawn mower engines have either 10 or 12-millimeter thread.

So you don’t use any spark plugs for your lawnmowers, which have bigger spark plugs, and the same goes for cars too.

Hence, you should avoid using them until they have a similar thread size, along with considering other factors. If not, you may end up damaging engine functions or even the plug.

Thread Length

Apart from the thread size, you also want to consider the thread length of spark plugs. Using the right thread length ensures a perfect and smooth engine operation. We found it as the best spark plug for lawnmowers.

Some car spark plugs are 3/4 inch in length, and some are 1/2 inch in length. On the other contrary, you will find many lawn mower spark plugs with 3/8 inch in length.

You don’t want to use the wrong spark plugs as it will lead to engine impairment gradually.

Heat Range

Suppose the thread diameter and length of car spark lengths have matched. Will you use it for your lawnmower engines? Before that, you want to consider the heat range.

If you are lawnmower has an air-cooled engine, a car spark plug might be too cool or too hot for your lawnmower.

If you have a Kohler lawnmower, you can think about this ignition coil.

The spark plug center electrode will pre-ignite if the lawnmower engine becomes too hot. On the contrary, if the lawnmower engine becomes too cold, there is a risk of oil or gas fouling a spark plug, which may lead to a misfire.

Model Specification

Are lawn mower spark plugs same as car spark plugs depend on their models too?

In older days, lawn mower spark plugs only would come in a few models. That’s why they could use them in different models.

However, now, a wide range of lawnmowers are available in different specifications. So, you want to check the manual instructions to see whether your car spark plug has similar specifications to your mower spark plug; only then you can use it.

Are All Lawn Mower Spark Plugs The Same?

You have already understood that a considerable difference exists between lawn mower spark plugs and car spark plugs. Even not all lawn mower spark plugs are the same.

Are all lawn mower spark plugs the same?

No, all lawn mower spark plugs have similar specifications. They come in different sizes and dimensions. Additionally, some spark plugs work efficiently in cooler temperatures, while some run smoothly in hotter temperatures.

So, what problems will you face if you install incompatible spark plugs for your lawnmower? Installing extremely cool plugs for your lawnmower may lead to running at low power, and it may even sometimes disconnect. Similarly, the internal combustion engine may start to show impairment for using extremely hot plugs.

Besides, you also don’t want to install too long or too short a lawnmower that could lead to poor engine performance and other issues. So now you know clearly about this question: are all lawn mower spark plugs the same?

What Kind Of Spark Plug Does A Craftsman Lawn Mower Take?

Few lawn mower brands are as good as Craftsman. They have built a remarkable reputation by manufacturing high-quality self-propelled lawnmowers.

What kind of spark plug does a craftsman lawn mower take?

Most lawn mowers from the Craftsman brand are either compatible with the J19LM spark plug or a Champion model RJ19LM. However, you may also find a few other spark plug models, which are mostly seen in the new and advanced Craftsman Lawn Mowers for professional usage.

What Kind Of Spark Plug Does A Toro Lawn Mower Take?

When you are looking for excellent power and cutting quality, Toro Lawn Mowers are one of the best options to consider. They have many self-propelled lawn mowers, which can help you cut even the most challenging lawn.

What kind of spark plug does a Toro lawn mower take?

Though several types of sparks plugs are available for Toro Lawn Mowers, RA8HC and RJ19LM are the two most commonly used spark plugs for this brand. However, you need to manufacturer’s recommendation before installing a particular one for your lawnmower.

What kind of spark plug does a Toro lawn mower take depends on the lawnmower you have. Whether you should use these two commonly used plugs depends on your engine compatibility.

What Kind Of Spark Plug Does A Honda Lawn Mower Take?

If you are looking for a lawnmower, which is not easily prone to repair, you should check out some Honda lawnmowers. This automobile company has built a reputed image in the lawnmower industry too.

What kind of spark plug does a Honda lawn mower take?

The most popular and extensively used spark plug for Honda lawn mowers is NGK spark plug. In fact, it is pretty common among Honda lawnmowers. With this spark plug, you can ensure top-notch performance with the lowest failure rate for your engine. This lawnmower has long-lasting durability and fuel efficiency too.

Knowing what kind of spark plug does a Honda lawn mower take will help you decide the best one for your lawnmower. Though the NGK spark plug is a widely used spark plug for Honda lawn mowers, you should still want to be sure whether your engine is compatible with it or not.

What Kind Of Spark Plug Does A Murray Lawn Mower Take?

If you are an old user of lawn mowers, you have most probably heard about the Murray brand, and you know how good they were. They have many high-quality pushes and riding lawnmowers.

What kind of spark plug does a Murray lawn mower take?

Murray lawnmowers need different types of spark plugs based on the model and size. However, the Briggs Stratton Spark Plug (RJ19LM) is a common spark plug that is compatible with many lawnmowers.

But you will also find unique spark plugs for a particular lawnmower too. For example, if you have an MU-743188B lawnmower, you should use the 74-3188B Murray spark plug. For the MU-743190B lawnmower, it is recommended to use a 74-3190B spark plug. So it is essential to know what kind of spark plug does a Murray lawn mower takes before choose a particular one.

What Kind Of Spark Plug Does A Husqvarna Lawn Mower Take?

If you are looking for efficient and user-friendly lawn mowers, you can trust Husqvarna. Each lawn mower from this model has a truly stunning and first-rate ergonomic design.

What kind of spark plug does a Husqvarna lawn mower take?

Most latest lawnmowers from Husqvarna are compatible with NGK Standard Spark Plugs. However, you will also find a specific spark plug for a particular model.

Spark Plug Name Models that are compatible to use

What Type Of Spark Plug Does A Briggs And Stratton Lawn Mower Take?

It is hard to find who doesn’t know the name of Briggs And Stratton. This famous brand is dominating the market for more than 100 years with its quality machines.

What type of spark plug does a Briggs And Stratton lawnmower take?

It is best to use that type of spark plug recommended by Briggs And Stratton based on your lawn mower engine model. There are two types of lawn mowers engine available for Briggs And Stratton lawnmowers: flat-head and L-head engines.

For the lawnmower L-Head engine of Briggs And Stratton, three types of spark plugs are available:

Serial No. Type of Spark Plug

Knowing what type of spark plug does a Briggs And Stratton lawnmower take will help you prevent internal engine damage and performance issue.

Can You Use Any Spark Plug For Lawn Mower?

Various shapes, sizes, and models are available for spark plugs. Earlier, there weren’t such a variety of spark plugs in the market. But now, hundreds of spark plugs are available in the market.

Can you use any spark plug for lawn mower?

Probably not. Any spark plug may not be compatible with your lawnmower engine. You first need to know the type of lawnmower engine you have and then find out whether it fits your engine or not.

The best thing you can do is go to a nearby physical store with the old spark plug. You tell them your engine model and show them your old spark plug. They will show you the type of spark plug available for your lawnmower in their shop.

They may also have several options, and whichever suits your preferences best, you can choose. Hopefully, now know the answer to this question: can you use any spark plug for lawn mower?

Are Lawn Mower Spark Plugs Universal?

Lawnmowers maybe are not as complex as other automobiles. However, you can’t take them a simple machine because there are several moving parts in their engine.

Are lawn mower spark plugs universal?

No, every lawnmower has a specific spark plug for its engine. And, each engine has a unique engine model number, which determines the compatibility of a spark plug. Unless the spark plug fits the engine, you can’t get enough support for the engine. An incorrectly installed spark plug may damage or cause engine failure. Hence, before choosing particular spark plugs, you must make sure it fits your engine.

So, the spark plugs model vary. It is because several companies manufacture lawnmowers. They use different spark plugs for their lawnmower engines. It is best to check the manual instruction to find out the type of lawnmower your engine has.

How To Tell If Spark Plugs Are Bad Lawn Mower?

Wondering you can use the same spark plug for your lawnmower lifetime? No, after a specific time, you will need to change the spark plugs. But that doesn’t mean you will change functional spark plugs. Instead, change it only when it seems wrong.

How To Tell If Spark Plugs Are Bad Lawn Mower?

When the need to change the spark plug arises, your spark plug will show you symptoms such as unstable engine performance, difficulty to start, abnormal structure, too much fuel intake, etc. Therefore, the earlier you change the spark plug, the better it will be for the lawnmower.

Difficult To Start

One of the biggest issues you will see is having difficulty starting your lawnmower. You may need to go for several attempts to start the engine.

Unstable Engine Performance

When the replacement for spark plug comes, you will notice your lawn mower engine is not as efficient as it used to be earlier.

For example, you may notice the engine automatically stops in the middle of the mowing. Or, it doesn’t cut the grass as quickly as it used to do.

Too Much Fuel Intake

A bad spark plug might be the reason behind too much fuel intake than before. Because of this, inefficient or incomplete combustion of gasoline occurs.

Abnormal Structure

Sometimes, you can tell if your spark plug is bad or not just by looking at its physical structure. Any chips or cracks in the spark plug are a sign of a bad spark plug. They are always supposed to have a good shape if they are not bad.

So, these are ways you can know how to tell if spark plugs are bad lawnmowers.

What Kind Of Spark Plug Goes In A Lawn Mower?

You can’t always use a similar spark plug for both automobile engines and lawnmower engines. After all, their physical structure and functions slightly vary. However, many common sparked plugs are made by many companies, which are compatible with several models of lawnmowers.

What kind of spark plug goes in a lawn mower?

Spark plug compatibility with a lawnmower depends in part on the thread size. From 10 to 12 mm, threads come in different sizes. So whenever you want to replace your current spark plug, check out the information of the old spark to know its compatibility.

Knowing what kind of spark plug goes in a lawnmower will help you choose the perfect one for your lawnmower. As a result, you will get reliable and consistent performance to cut grass.

Are Lawn Mower Spark Plugs Pre Gapped?

There must be a correct gap between the electrodes of a spark plug to prevent skip firing and too early ignition. According to experts, the distance should be between 0.028 and 0.031 inches.

Are lawn mower spark plugs pre-gapped?

The spark plugs of most lawnmowers are pre-gapped before they are put on the market. However, when lawnmowers are sent to physical stores by manufacturers, the gapping position may change. That’s why it is better to check the gap distance before installing it.

When the gapping position is inaccurate, it may cause ignition issues. This mainly occurs due to the movement of the products while shipping them from one area or country to another area or country. You should now have a clear idea on this query: are lawn mower spark plugs pre-gapped?

Buy them at Walmart, eBay, or Etsy

Champion RC12YC spark plug. Etsy, eBay

Electromagnetic Suppression (Ems) Spark Plug. Etsy, eBay

Standard Resistor Spark Plug. Etsy, eBay

Conclusion

So, are you still wondering about this common question: are lawn mower spark plugs same as car spark plugs? You should not. We have outlined all essential details to learn about lawn mower spark plugs.

Most times, you can’t use car spark plugs for your lawn mower spark plugs. But few exemptions exit. Nowadays, many brands manufacture standard spark plugs, which can be used for automobiles and lawnmowers too.

But, make sure you are purchasing the correct spark plug for your lawnmower to get reliable, consistent, and efficient grass-cutting performance. Thanks for reading!

Last update on 2023-01-28 / Affiliate links / Images from Amazon Product Advertising API

Lee Safin was born near Sacramento, California on a prune growing farm. His parents were immigrants from Russia who had fled the Bolshevik Revolution. They were determined to give their children a better life than they had known. Education was the key for Lee and his siblings, so they could make their own way in the world. Lee attended five universities, where he studied plant sciences and soil technologies. He also has many years of experience in the U.S. Department of Agriculture as a commercial fertilizer formulator.

Thoughts on “Lawn Mower Spark Plugs VS Car Spark Plugs – Are They Same?”

Lawn Mower Spark Plugs

When you go to start your lawnmower, you expect it to spring to life on the first crank. But sometimes even a well-maintained mower can be difficult to start, rough-running, and excessively gas-guzzling. Why? Blame it on poorly-performing lawn mower spark plugs. Performance spark plugs can make the difference between a reliable lawn mower that never lets you down and one that leaves you hanging.

Best for small engines. Miraculous.

These plugs are miraculous in small engines on lawnmowers, etc. The difference between a regular plug and a Pulstar plug in a small engine is like night and day. Turned my kid’s go-kart into a genuine death trap. Pressure washer turned into a beast. Lawnmower ignites before I’m halfway through the first pull. The results are incredible.

Lawn mower spark plugs that boost performance

High-performance spark plugs aren’t just for race cars and motorsports. Small engines also rely on a spark to combust fuel, in fact, small engines are highly sensitive to spark plugs underperforming. Pulstar lawn mower spark plugs provide faster starts and last much longer than conventional plugs. The ultra-high intensity electrical discharge our plugs deliver gives you more power and a quicker throttle response. The precise timing of our spark plugs keeps small engines purring along happily, giving them more stability and a longer lifespan.

I use these on all my cars

I have installed these in over 10 vehicles. Always made them run better and in most cases got better mileage. I installed a set in my 2006 GLI. Improved mileage by 2 mile per gallon. When I sold it, I took them out and mileage dropped immediately by 2 miles per gallon. I use these in all my cars and installed them in many of my friends cars and truck. Alos a huge improvement in the dual plugged Dodge trucks but you need to replace all the plugs.

Cliff, Verified Buyer

High-performance Pulstar lawn mower spark plugs save fuel

High-quality lawn mower spark plugs do more than just keep the engine running smoothly–they improve fuel economy. Pulstar plugs use a unique combustion technology that results in the most Rapid, consistent, and complete burn of fuel possible. The increased efficiency means that you get more power and waste less fuel on each mow. Whether you’re using a push mower or a riding mower, running out of gas mid-mow is a hassle. When your machine is using gas more efficiently, you can’t help but notice the difference.

Save time and money with the best lawn mower spark plugs

The less time you spend replacing plugs and struggling with a sluggish, hard-to-start mower, the more time you can spend on productive, uninterrupted mowing. Pulstar spark plugs can save you maintenance time by keeping your mower running when you need it. What’s more, performance lawn mower spark plugs can save you money on gas by eliminating waste.

Want to know if Pulstar sells the right spark plugs for your lawnmower? Find out now.

Cut your emissions as you cut your lawn

Small engines are notorious for high levels of emissions. However, much of this is due to inefficient fuel use caused by poor engine performance. When you use Pulstar high-performance lawn mower spark plugs, your mower burns fuel more completely, resulting in reduced emissions.

Frequently asked questions about spark plugs

How often should I replace my spark plugs?

For best results, you should replace your spark plugs every 50,000 miles under normal driving conditions.

How do I know if one of my spark plugs is fouled?

If your engine misfires, idles roughly or doesn’t run smoothly, one or more of your spark plugs may have become dirty or fouled. Other symptoms of a fouled spark plug include a lack of acceleration, reduced gas mileage and difficulty starting.

Do I still need to gap spark plugs?

Pulstar spark plugs should be gapped to the setting recommended by the engine manufacturer up to 0.055” (1.40 mm). Do not gap greater than 0.055”. For factory turbo or supercharged engines, gap Pulstar spark plugs to 0/025” (0.63 mm).

What happens if I don’t gap the spark plugs correctly?

An engine with spark plugs that are not gapped correctly will not run smoothly and may not have power or misfire.

How often should I replace my lawn mower spark plug?

Lawnmower spark plugs are typically replaced once a year.

Does it help to clean spark plugs?

Spark plugs cannot be cleaned enough to operate as new. It is always best to replace fouled or contaminated spark plugs.

How do I install Pulstar spark plugs?

Pulstar spark plugs install the same way conventional spark plugs are installed. When using a ratchet and socket or similar tool, care should be taken to not put a side load on the ceramic.

What kind of performance benefits can I expect when upgrading to Pulstar spark plugs?

Customers see significant improvements in engine torque, horsepower, fuel economy and emissions. They notice quicker throttle response, smoother operation and improved towing capacity.

How do Pulstar spark plugs produce these performance benefits?

The science underlying our technology is sometimes called pulse power: energy accumulated over time is released quickly producing a very high power event, i.e., a pulse. Our patented technology applies this concept by embedding in Pulstar spark plugs a capacitor to store ignition coil energy prior to discharge, and to drive an ultra-high current channel across the gap when released. That powerful current creates an electromagnetic field that expands through the combustion chamber and ionizes the fuel air mixture, allowing the flame kernel to grow much more rapidly than in a conventional spark plug ignition event. The result is the most precise, powerful, consistent and complete burn possible.

Do you guarantee these performance benefits?

Yes, we do. If you aren’t completely satisfied with your Pulstar spark plugs, return them, together with your dated sales receipt, to the merchant from whom you bought them within 30 days for a full refund of your purchase price.

Do Pulstar spark plugs come with a warranty?

Yes, they do. If your Pulstar spark plugs prove to be defective in materials or workmanship within one (1) year of purchase, return them, along with your dated sales receipt and an explanation of the reason for the return, to Pulstar LLC, 2451 Alamo Avenue SE, Albuquerque, New Mexico 87106 and Pulstar LLC will replace them.

Starts better on a cold morning

I like these plugs in my 01 Isuzu Trooper! It runs better and starts better on a cold morning, more power too!

Charles Jennings, Verified Buyer

I like these plugs in my 01 Isuzu Trooper! It runs better and starts better on a cold morning, more power too!

A lot more fun to drive now!

Brandon B., Verified Buyer

Noticed increase in horsepower

The spark plugs work great, and I have noticed a growth in horse power, and startup time. It is running better. Thank you for shipping quality products in a timely manner.

Denis, Verified Buyer

The spark plugs work great, and I have noticed a growth in horse power, and startup time. It is running better. Thank you for shipping quality products in a timely manner.

Dramatic improvement

Bruce M., Verified Buyer

Improvement has been phenomenal

I have them in my 1970 jaguar E-Type and the performance improvement has been phenomenal including better gas mileage. I don’t have but a couple of hundred miles on them but I sure like the additional performance they are giving me.

Richard Russ, Verified Buyer

You can feel the difference

These plugs really walk the walk when you install them. I compared the spark compared to what I had in before and the size of the spark is huge! I had Iridium plugs in before they blew those plugs away! You can feel the difference in the throttle and the way it responds when you punch the gas. I would recommend them to anyone. YES they are pricy but I feel they are worth every penny. I would buy them again any day of the week!

Icing on the cake

They are the icing on the cake in a modified engine (excluding ignition mods). These plugs are especially good in an engine that doesn’t have a centered in combustion chamber plug or dual plugged head.

Gas mileage went up about 10%

I put them in my ’64 lancia flavia replacing very good Champion n3 plugs. I set the car up for a fast idle at 1100rpm and after the plug swap the idle was 1400rpm and the mileage went up about 10%.

Karen A., Verified Buyer

I put them in my ’64 lancia flavia replacing very good Champion n3 plugs. I set the car up for a fast idle at 1100rpm and after the plug swap the idle was 1400rpm and the mileage went up about 10%.

Running smoother

Got these, installed them into my Jeep, and so far, it’s been running smoother and more economical than before. Previously, I was getting ~15 miles per Gallon, now it’s 20 MPG. Horsepower has increased, and the acceleration is faster than before.

James C., Verified Buyer

It’s a no brainer

I don’t really write reviews… but I felt I had to with these plugs. I researched the website and technology and it made sense. I had no idea a spark plug could make such a difference in performance until now!! I have a 2014 EFI Triumph Bonneville. I have added a ton of performance upgrades and even remapped the fuel injection for more performance. All of the upgrades made a difference. but none as dramatic. nor a bigger bang for the buck. as swapping out my plugs for these. I will put these plugs in anything and everything I have a spark plug in if possible. To me it’s a just a no brainer. Do yourself a favor and get them.

Brian J., Verified Buyer

Beyond happy

These are not your latest Fad of a spark plug, They work awesome as stated. After all these years of trying every spark plug brand out there. I now am beyond happy with these plugs since I can actually feel the consistent power from zero to my top end. Now the Pulstar’s are going in my fleet! I cant wait to try them in my snow machine.

Jennifer C., Verified Buyer

IMMEDIATELY I noticed an improvement

I came across Pulstar spark plugs in some 4×4 enthusiast forums, and after looking through their website I was so impressed with all the background information provided (both the level of scientific analysis, and the sheer volume of empirical data) that I decided the generally high-price was justified, and I would try the plugs in my own vehicles (a 1989 Landcruiser and a 1997 4Runner). IMMEDIATELY I noticed an improvement in throttle response; it was particularly obvious in my 4Runner which suffered from an ‘engine stutter’ issue that I had been trying to properly diagnose and fix for about a year. Right away, the stutter issue went from being noticeable in approx 15-30% of certain throttle situations to scantily noticeable at all, and when it is noticed it’s only in approx 0-5% of the same throttle situations. I also noticed a significant improvement in fuel economy. I am almost religious when it comes to calculating my overall fuel economy for the last tank of gas after every fillup (I even know exactly how much my different-than-factory-sized tires impact odometer readings on both of my trucks, based on distance comparisons between odometer vs. GPS data) and prior to changing the spark plugs I would average between 16-18 MPG (often in the high 16s. mid 17s, and only reaching 18 on tanks that were nearly 100% highway miles at cruising speed) in the 4Runner. Now, since installing Pulstar spark plugs, I’ve filled-up 4x tanks of gas in the 4Runner (none yet in Landcruiser). and on the first three (which were no different from my normal weekly commute to/from) I averaged 18 MPG (up to 18.5) and on the last tank, which admittedly was quite favorable in that it was 260 miles all on the highway at cruising speed (not more than 75mph) and coming from Bishop CA to Los Angeles CA (an overall drop in elevation of about 3,000ft) I averaged an ALL-TIME-HIGH overall 20.1 MPG!

Zaven K., Verified Buyer

Sources:

https://www.yourgreenpal.com/blog/should-i-change-my-lawn-mowers-spark-plugs-every-25-hours
https://gardensynthesis.com/are-lawn-mower-spark-plugs-same-as-car-spark-plugs/
https://pulstar.com/lawn-mower-spark-plugs/