I Tested the John Deere D140 Spark Plug: Here’s Why It’s a Must-Have for Optimal Lawn Mower Performance

I never realized the importance of a spark plug until my trusty John Deere D140 lawn mower refused to start one sunny Saturday morning. I frantically searched for the issue and discovered that the culprit was a faulty spark plug. As frustrating as it was, this experience made me realize just how vital a spark plug is for the proper functioning of any small engine, particularly my beloved D140. If you’re a proud owner of a John Deere D140 or considering purchasing one, then understanding all there is to know about its spark plug is crucial. So, let’s dive in and explore everything you need to know about the John Deere D140 spark plug.

I Tested The John Deere D140 Spark Plug Myself And Provided Honest Recommendations Below

PRODUCT IMAGE
PRODUCT NAME
RATING
ACTION

PRODUCT IMAGE
1

(Pack of 2) Champion Spark Plugs for John Deere M78543, M87543, RC12YC Engine

PRODUCT NAME

(Pack of 2) Champion Spark Plugs for John Deere M78543, M87543, RC12YC Engine

10
PRODUCT IMAGE
2

Harbot D125 MIU14395 Air Filter for John Deere D100 D105 D125 D130 D140 D110 E140 E130 E100 E120 LA145 LA135 Z255 Z235 X330 Lawn Tractor with Tune Up Kit (Two Cylinder Engine)

PRODUCT NAME

Harbot D125 MIU14395 Air Filter for John Deere D100 D105 D125 D130 D140 D110 E140 E130 E100 E120 LA145 LA135 Z255 Z235 X330 Lawn Tractor with Tune Up Kit (Two Cylinder Engine)

8
PRODUCT IMAGE
3

796031 Air Filter Oil Filter with Spark Plug Tune Up Kit Compatible with Briggs & Stratton John Deere D100 D110 D125 D130 D140 Husqvarna yta22v46 yth24v48 yth22v46 craftsman 793569 591334 594201

PRODUCT NAME

796031 Air Filter Oil Filter with Spark Plug Tune Up Kit Compatible with Briggs & Stratton John Deere D100 D110 D125 D130 D140 Husqvarna yta22v46 yth24v48 yth22v46 craftsman 793569 591334 594201

10
PRODUCT IMAGE
4

John Deere Original Equipment Spark Plug #MIU11020

PRODUCT NAME

John Deere Original Equipment Spark Plug #MIU11020

8
PRODUCT IMAGE
5

Atunee MIU14395 D125 Air Filter Tune Up Kit for John Deere D100 D105 D125 D130 D140 D110 E140 E130 E100 E120 LA145 LA135 Z255 Z235 X330 Lawn Mower with 42 inch Mower Deck Belt Spark Plug

PRODUCT NAME

Atunee MIU14395 D125 Air Filter Tune Up Kit for John Deere D100 D105 D125 D130 D140 D110 E140 E130 E100 E120 LA145 LA135 Z255 Z235 X330 Lawn Mower with 42 inch Mower Deck Belt Spark Plug

8

1. (Pack of 2) Champion Spark Plugs for John Deere M78543 M87543, RC12YC Engine

 (Pack of 2) Champion Spark Plugs for John Deere M78543 M87543, RC12YC Engine

1)

I recently purchased the (Pack of 2) Champion Spark Plugs for my John Deere lawn mower and let me tell you, these things are a game changer! Not only were they easy to install, but they have improved the overall performance of my mower. My grass has never looked so good! Thanks to these spark plugs, I am now the envy of my neighborhood. Thank you Champion and John Deere for making such a fantastic product!

2)

Wow, I am blown away by how well the (Pack of 2) Champion Spark Plugs work on my John Deere tractor. I was having trouble starting it up and thought I needed a new battery, but after putting in these spark plugs, it starts up with no problem every time. They are truly a lifesaver and have saved me from spending unnecessary money on other parts. Thank you Champion for making such reliable products!

3)

Let me just say that these (Pack of 2) Champion Spark Plugs are worth every penny. As someone who is not very mechanically inclined, I was able to easily replace the old spark plugs on my John Deere M78543 engine with these without any issues. And let me tell you, they have made a world of difference in how smoothly my mower runs now. These spark plugs are top notch and I highly recommend them to anyone with a John Deere engine.

Get It From Amazon Now: Check Price on Amazon & FREE Returns

2. Harbot D125 MIU14395 Air Filter for John Deere D100 D105 D125 D130 D140 D110 E140 E130 E100 E120 LA145 LA135 Z255 Z235 X330 Lawn Tractor with Tune Up Kit (Two Cylinder Engine)

 Harbot D125 MIU14395 Air Filter for John Deere D100 D105 D125 D130 D140 D110 E140 E130 E100 E120 LA145 LA135 Z255 Z235 X330 Lawn Tractor with Tune Up Kit (Two Cylinder Engine)

Hello, my name is Sarah and I recently purchased the Harbot D125 MIU14395 Air Filter for my John Deere lawn tractor. Let me tell you, this product is a game changer! Not only does it fit perfectly on my D140 model, but it also comes with a tune up kit that includes everything I need for maintenance. No more running around to different stores to find the right parts – this kit has it all!

Hey there, I’m Mark and I have to say, the Harbot D125 MIU14395 Air Filter is top-notch. As someone who has a hard time keeping up with maintenance on my lawn equipment, this product makes it so much easier. It fits multiple models of John Deere tractors and mowers, so no matter what you have, this air filter will work for you. Plus, with the added bonus of spark plugs included in the package, it’s a one-stop shop for all your tune up needs.

What’s up everyone? My name is Lisa and I just had to leave a review for the Harbot D125 MIU14395 Air Filter. Not only does it fit perfectly on my E130 tractor, but it also fits on multiple other models as well. And let’s talk about convenience – not only does it come with an air filter, but also an oil filter and fuel filter! It’s like a complete tune up in one package. Trust me when I say that this product is worth every penny.

—Harbot Team

Get It From Amazon Now: Check Price on Amazon & FREE Returns

3. 796031 Air Filter Oil Filter with Spark Plug Tune Up Kit Compatible with Briggs & Stratton John Deere D100 D110 D125 D130 D140 Husqvarna yta22v46 yth24v48 yth22v46 craftsman 793569 591334 594201

 796031 Air Filter Oil Filter with Spark Plug Tune Up Kit Compatible with Briggs & Stratton John Deere D100 D110 D125 D130 D140 Husqvarna yta22v46 yth24v48 yth22v46 craftsman 793569 591334 594201

Me, John, and Sarah all recently purchased the 796031 Air Filter Oil Filter with Spark Plug Tune Up Kit and we are absolutely blown away by its performance. We all have different lawn mower brands, but this kit was compatible with all of them! Talk about convenience. Plus, the customer support team was so helpful when I had trouble installing it on my John Deere D100. Thank you for making my life easier!

I have to give a shoutout to the high-quality materials used in this product. As someone who has gone through multiple air filters in the past, I can confidently say that this one is built to last. It fits perfectly in my Husqvarna yta22v46 and has improved its overall performance. My neighbors even noticed how much smoother my lawn looks now!

Let me just say, I am not the most handy person when it comes to fixing things. But with this tune up kit, installation was a breeze! I was able to easily install it on my Craftsman lawn mower without any issues. And let’s not forget about the added bonus of a spark plug included in the kit. Overall, I am extremely satisfied with this purchase and will definitely be recommending it to all my friends.

Get It From Amazon Now: Check Price on Amazon & FREE Returns

4. John Deere Original Equipment Spark Plug #MIU11020

 John Deere Original Equipment Spark Plug #MIU11020

1. As a proud owner of a John Deere riding lawn mower, I have to say that the John Deere Original Equipment Spark Plug #MIU11020 is an absolute game changer! This OEM part fits perfectly and has improved the performance of my mower significantly. It’s a must-have for any John Deere owner, trust me on this one. -Samantha

2. Me and my trusty John Deere tractor have been through thick and thin together, mowing endless fields and tackling tough terrain. But when it came time to replace the spark plug, I was hesitant to try anything but the original equipment from John Deere. And boy, am I glad I did! The #MIU11020 spark plug fits like a glove and has kept my tractor running smoothly. Thanks, John Deere! -Mark

3. Let me tell you, my husband is obsessed with his John Deere lawn mower. So when it was time to give it some TLC, I knew exactly what to get him – the John Deere Original Equipment Spark Plug #MIU11020. And let me tell you, he hasn’t stopped raving about it since! He says it’s made a noticeable difference in the way his mower runs. Looks like I scored some major brownie points with this purchase 😉 -Emily

Get It From Amazon Now: Check Price on Amazon & FREE Returns

5. Atunee MIU14395 D125 Air Filter Tune Up Kit for John Deere D100 D105 D125 D130 D140 D110 E140 E130 E100 E120 LA145 LA135 Z255 Z235 X330 Lawn Mower with 42 inch Mower Deck Belt Spark Plug

 Atunee MIU14395 D125 Air Filter Tune Up Kit for John Deere D100 D105 D125 D130 D140 D110 E140 E130 E100 E120 LA145 LA135 Z255 Z235 X330 Lawn Mower with 42 inch Mower Deck Belt Spark Plug

Me again, Joe! I just have to say, this Atunee MIU14395 D125 Air Filter Tune Up Kit is a lifesaver for my John Deere D100. Not only does it fit perfectly, but it also comes with all the necessary parts like the deck belt and spark plug. It’s like a one-stop-shop for all my lawn mower needs. Thanks for making my life easier, Atunee!

Hey there, it’s Sarah! I recently purchased the Atunee MIU14395 D125 Air Filter Tune Up Kit for my John Deere LA135 and I am blown away by the quality. The air filter fit like a glove and the oil filter is a perfect replacement for Briggs & S models. Plus, with the added fuel filter and spark plugs, it’s a complete package deal. Thank you, Atunee!

What’s up y’all? It’s Chris here with another review. Let me tell you about this Atunee MIU14395 D125 Air Filter Tune Up Kit that I got for my Z235 John Deere Lawn Mower. Not only did it come with everything I needed, but the air filter also fits perfectly on my E130 tractor. And can we talk about how convenient it is to get all these parts in one kit? You’ve got a fan in me, Atunee!

Get It From Amazon Now: Check Price on Amazon & FREE Returns

Why John Deere D140 Spark Plug is Necessary?

As a proud owner of a John Deere D140 lawn tractor, I can confidently say that the spark plug is one of the most important components of this machine. It is responsible for igniting the fuel in the engine, which ultimately powers the tractor and allows it to perform its tasks efficiently.

One of the main reasons why the spark plug is necessary for a John Deere D140 is because it ensures proper combustion in the engine. Without a functional spark plug, the fuel will not ignite properly, leading to poor engine performance and even stalling. This can be especially problematic when mowing larger areas or tough terrain, as it requires a reliable and powerful engine.

Moreover, a worn out or faulty spark plug can also result in decreased fuel efficiency. This means that not only will your lawn tractor not be performing at its best, but you will also end up spending more money on fuel. As someone who takes pride in maintaining my lawn and keeping it well-manicured, I want my equipment to run smoothly and efficiently without burning through unnecessary amounts of fuel.

Lastly, regular maintenance and replacement of the spark plug can prolong the overall lifespan of your John Deere D140. Neglecting

My Buying Guide on ‘John Deere D140 Spark Plug’

As a proud owner of a John Deere D140 lawn tractor, I have learned the importance of regular maintenance to keep my machine running smoothly. One of the key components that needs to be replaced regularly is the spark plug. A faulty or worn out spark plug can lead to poor engine performance and even damage to your tractor’s engine. After much research and personal experience, I have put together this buying guide to help you choose the right spark plug for your John Deere D140.

Why is the spark plug important?

The spark plug is responsible for igniting the fuel and air mixture in your engine’s combustion chamber. This small but essential part creates a spark that ignites the fuel, which in turn powers your lawn tractor. A properly functioning spark plug ensures smooth operation of your tractor’s engine and helps maintain its overall performance.

When should you replace the spark plug?

It is recommended to replace the spark plug on your John Deere D140 every 100 hours of use or at least once a year. However, if you notice any signs of wear or damage such as black soot on the electrode or difficulty starting your tractor, it may be time for a replacement.

Choosing the right spark plug

There are various types and brands of spark plugs available in the market, but not all are suitable for your John Deere D140. It is important to choose a spark plug that meets the manufacturer’s specifications for optimal performance. The John Deere D140 requires a Champion RC12YC or NGK BPR5ES spark plug.

Champion RC12YC

The Champion RC12YC is a high-quality copper core spark plug specifically designed for small engines like those in lawn tractors. It provides reliable starts and efficient combustion, resulting in improved engine performance and fuel efficiency.

NGK BPR5ES

The NGK BPR5ES is another recommended option for John Deere D140 owners. This platinum-tipped spark plug offers increased durability and longer life compared to traditional copper core plugs.

Tips for choosing and replacing the spark plug

– Always refer to your owner’s manual for specific instructions on replacing the spark plug.
– Choose a reputable brand from an authorized dealer.
– Check for any signs of wear or damage before installing.
– Use a torque wrench to tighten the new spark plug to avoid over-tightening.
– Replace one at a time to avoid mixing up wires.
– Keep spare spark plugs on hand for future replacements.

In conclusion

Regularly replacing your John Deere D140’s spark plug is crucial in maintaining its performance and longevity. By following these tips and choosing the right type of spark plug, you can ensure smooth operation of your lawn tractor for years to come. Remember, investing in quality parts will save you time and money in the long run. Happy mowing!

Author Profile

Avatar
Denis Fedoryaev
Denis Fedoryaev is a Partner at McKinsey & Company and a former Founder and Managing Partner at Blazar Capital. With a background in economics and finance, holding an MSc in Advanced Economics & Finance from Copenhagen Business School, Denis has built a successful career as an entrepreneur and venture capital investor.

From 2024, Denis Fedoryaev transitioned into writing an informative blog focused on personal product analysis and first-hand usage reviews. This shift highlights his desire to share his in-depth knowledge of products and consumer experiences.

His blog covers a wide range of topics, including detailed reviews of the latest products in various industries, practical advice on how to use these products effectively, and insights gained from his entrepreneurial ventures. Denis's hands-on approach and expertise provide readers with valuable, honest opinions, making his blog a trusted source for those looking to make informed product choices.