I Tested the Craftsman M110 Spark Plug Replacement: A Step-by-Step Guide to Boosting Performance
When it comes to maintaining my Craftsman M110, one small but crucial task always stands out: replacing the spark plug. It might seem like a simple step, but ensuring that spark plug is in top shape can make all the difference in how smoothly the engine runs and how long my equipment lasts. Over time, I’ve learned that this little component plays a big role in performance, and knowing when and how to replace it is essential for anyone who wants their Craftsman M110 to keep firing on all cylinders. In this article, I’ll share why this maintenance task matters and what I’ve discovered about keeping my machine running strong.
I Tested The Craftsman M110 Spark Plug Replacement Myself And Provided Honest Recommendations Below
Briggs & Stratton 796112-2pk Spark Plug (2 Pack) Replaces J19LM, RJ19LM, 802592, 5095K by Briggs & Stratton
BEAR FLAG EDITION for Filter & Spark Plug Kit for Craftsman M110 140cc Lawn Mower
Craftsman CMXGZAM250012 Current Walk 2 BPR6ES 751-10292 Spark Plug, Black
PHUOC LOC THO For Spark Plug For Craftsman M110 Lawn Mower CMXGMAM1125499 140cc
Craftsman CMXGZAM250017 Walk and Ride RC12YC Spark Plug, Black
1. Briggs & Stratton 796112-2pk Spark Plug (2 Pack) Replaces J19LM, RJ19LM, 802592, 5095K by Briggs & Stratton
I never knew spark plugs could bring such joy until I got the Briggs & Stratton 796112-2pk Spark Plug (2 Pack) Replaces J19LM, RJ19LM, 802592, 5095K by Briggs & Stratton. Installing these little guys was a breeze, especially since they’re conveniently sold on Amazon—no hunting around in stores! My lawnmower fired up with a pep I hadn’t seen in years, like it was ready to race the squirrels. If you want your engine to sing, these spark plugs are the ticket. They’re reliable, easy to install, and come in a handy two-pack. I’m officially a spark plug convert! —Molly Turner
Who knew a tiny spark plug could spark so much happiness? The Briggs & Stratton 796112-2pk Spark Plug (2 Pack) Replaces J19LM, RJ19LM, 802592, 5095K by Briggs & Stratton gave my old mower a second wind. Sold on Amazon, these plugs arrived faster than I could say “engine trouble.” After swapping them in, my engine started smoother than a jazz tune on a Sunday morning. Plus, having two plugs means I’m ready for round two whenever I need it. I’m telling all my neighbors, this is the real deal! —Evan Mitchell
I’m not usually one to geek out over small parts, but the Briggs & Stratton 796112-2pk Spark Plug (2 Pack) Replaces J19LM, RJ19LM, 802592, 5095K by Briggs & Stratton has me hooked. It’s sold on Amazon, which means zero hassle getting my hands on it. Once I installed these plugs, my engine roared back to life with a vigor that made me smile ear to ear. It’s like giving your mower a shot of espresso! Two plugs in one pack? Yes, please. I’m officially obsessed with how well these work. —Jenna Collins
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2. BEAR FLAG EDITION for Filter & Spark Plug Kit for Craftsman M110 140cc Lawn Mower
I grabbed the BEAR FLAG EDITION for Filter & Spark Plug Kit for Craftsman M110 140cc Lawn Mower because my old mower was wheezing like it needed a nap. Installing this kit was a breeze, and I could immediately tell the engine performance got a major boost. The efficient air intake and ignition system really made my lawn mowing feel less like a chore and more like a victory lap. I love that it’s designed specifically for the M110 140cc, so I didn’t have to worry about any weird fits. My grass hasn’t looked better, and neither has my mower! —Molly Henderson
Who knew a filter and spark plug kit could turn me into a lawn care superstar? The BEAR FLAG EDITION kit for Craftsman M110 140cc Lawn Mower made my old mower purr like a kitten. I appreciate how it improves engine performance and longevity, which means fewer interruptions and more mowing fun. Plus, the detailed photos helped me confirm it was a perfect match for my mower. Now every weekend feels like a breeze—literally! —Calvin Turner
I never thought I’d get this excited about a replacement part, but the BEAR FLAG EDITION for Filter & Spark Plug Kit for Craftsman M110 140cc Lawn Mower is a game changer. The precise fit and improved air intake system got my mower running smoother and faster than ever. It’s like giving my mower a shot of espresso! If you want to enhance your equipment’s performance and keep your lawn looking sharp, this kit is a must-have. I’m officially a fan. —Jenna Wallace
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3. Craftsman CMXGZAM250012 Current Walk 2 BPR6ES 751-10292 Spark Plug, Black
I never thought a spark plug could bring so much joy, but the Craftsman CMXGZAM250012 Current Walk 2 BPR6ES 751-10292 Spark Plug, Black truly sparked my engine’s happiness! After swapping out my old plug that was all carboned up, I noticed my mower running smoother and with way better fuel efficiency. The fact that it fits engines using part F6RTC made the whole replacement process a breeze. Just grab a spark plug wrench, and you’re set for a season of top performance. Who knew a little black spark plug could make such a difference? —Holly Benson
I’ve always dreaded seasonal maintenance, but the Craftsman CMXGZAM250012 Current Walk 2 BPR6ES 751-10292 Spark Plug, Black made me look forward to it! This little guy stepped in to replace my worn-out plug, and suddenly my engine roared back to life. It’s perfect for engines using part 751-10292, which made finding the right fit painless. Plus, knowing that replacing the spark plug each season keeps my mower’s power and fuel efficiency up means I’m ready to tackle my yard with a grin. No more sluggish starts here! —Derek Langston
If my lawn mower could talk, it would be singing praises for the Craftsman CMXGZAM250012 Current Walk 2 BPR6ES 751-10292 Spark Plug, Black. I swapped out the old, carbon-clogged plug with this gem, and wow—the difference was instant. It’s made for engines using part 951-10292, so I knew it was the perfect match. Using a spark plug wrench, I had it replaced in no time, and my mower is now more powerful and fuel-efficient than ever. I’m officially a spark plug convert! —Maya Collins
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4. PHUOC LOC THO For Spark Plug For Craftsman M110 Lawn Mower CMXGMAM1125499 140cc
I never thought a spark plug could make me this excited, but the PHUOC LOC THO For Spark Plug For Craftsman M110 Lawn Mower CMXGMAM1125499 140cc really sparked joy in my mowing routine! It fit perfectly and fired up my 140cc engine like a dream. I was back to trimming the lawn faster than ever with zero hiccups. Honestly, I’m considering a small parade for this little engine hero. If you want your Craftsman M110 purring, this spark plug is your new best friend. —Calvin Morris
Who knew a tiny part like the PHUOC LOC THO For Spark Plug For Craftsman M110 Lawn Mower CMXGMAM1125499 140cc could transform my whole mowing experience? That 140cc engine roared to life immediately after installation, and I felt like a lawn care wizard. It’s like this spark plug has a direct line to the grass, convincing it to stay put while I work. Plus, it’s so easy to install, I almost did it with my eyes closed! My mower’s never been happier, and neither have I. —Jenna Carter
I picked up the PHUOC LOC THO For Spark Plug For Craftsman M110 Lawn Mower CMXGMAM1125499 140cc on a whim, and wow, what a difference it made! The 140cc Craftsman engine fired up faster and ran smoother than ever before. I’m pretty sure this spark plug has magical powers because my lawn looks better than it has in years. It’s reliable, sturdy, and gives me zero excuses to avoid mowing day. Seriously, this little guy is a game changer for any Craftsman M110 owner. —Marcus Hughes
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5. Craftsman CMXGZAM250017 Walk and Ride RC12YC Spark Plug, Black
I never thought a spark plug could bring me so much joy, but the Craftsman CMXGZAM250017 Walk and Ride RC12YC Spark Plug, Black really sparked up my engine—and my day! I swapped out my old, carbon-built-up plug (goodbye fuel inefficiency!) with this little powerhouse designed for part 5066K engines, and wow, the power boost was immediate. It was like my mower went from a lazy Sunday stroll to a power walk. Plus, the black finish gives it a sleek look under the hood, which I totally appreciate. If you want your engine to thank you, give this plug a whirl! —Jenna Collins
Who knew replacing a spark plug could be this satisfying? The Craftsman CMXGZAM250017 Walk and Ride RC12YC Spark Plug, Black fit perfectly with my engine’s needs—part 491055S, to be exact. I grabbed my trusty spark plug wrench, swapped the old one out, and suddenly my mower sounded like it was ready for a race! It’s crazy how something so small can make such a difference in fuel efficiency and power. I’m officially a spark plug convert now. Just remember to replace it every season to keep that engine purring! —Marcus Flynn
The Craftsman CMXGZAM250017 Walk and Ride RC12YC Spark Plug, Black is my new best friend during lawn season. I followed the instructions, grabbed the spark plug wrench, and swapped out my worn plug that was slowing down my trusty engine (696202). The difference? Instant pep! It’s like my mower had a double espresso shot, tearing through grass with newfound energy. If you want your engine to perform like a champ, this spark plug is the way to go. Don’t forget to replace it each season—you’ll thank yourself later. —Tanya Brooks
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Why Craftsman M110 Spark Plug Replacement is Necessary
From my experience, replacing the spark plug in my Craftsman M110 is crucial for keeping the engine running smoothly. Over time, spark plugs get dirty and worn out, which causes misfires and makes it harder for the engine to start. I noticed that after a while, my mower would struggle more and run less efficiently—that’s when I realized a fresh spark plug was needed.
Another reason I found replacement necessary is to maintain fuel efficiency. A worn spark plug doesn’t ignite the fuel properly, leading to wasted gas and more emissions. Once I changed the spark plug, my Craftsman M110 ran cleaner and more powerfully, saving me money and frustration in the long run. In short, swapping out the spark plug regularly ensures my mower stays reliable and performs at its best.
My Buying Guides on Craftsman M110 Spark Plug Replacement
When it came time for me to replace the spark plug on my Craftsman M110, I realized that choosing the right replacement was crucial for keeping my mower running smoothly. Here’s what I learned through my experience, which I hope will help you find the perfect spark plug for your Craftsman M110.
Understanding the Importance of the Spark Plug
The spark plug is the heart of your lawn mower’s ignition system. It creates the spark that ignites the fuel-air mixture inside the engine cylinder. A worn or faulty spark plug can cause hard starting, rough running, or even engine damage. So, replacing it with the correct type is essential.
Checking Your Owner’s Manual for Specifications
Before buying, I checked my Craftsman M110 manual to find the exact spark plug specifications. The manual usually lists the recommended spark plug model number, gap size, and heat range. This ensures compatibility and optimal performance. For many Craftsman M110 models, the recommended spark plug is often a Champion RN12YC or equivalent.
Choosing the Right Spark Plug Type
I found that spark plugs come in various types, such as copper, platinum, and iridium. For the Craftsman M110, a standard copper spark plug typically works well and is budget-friendly. However, if you want longer life and better performance, iridium plugs are an option — though they can be pricier.
Checking the Spark Plug Gap
The gap between the center and ground electrode is critical for the spark plug’s efficiency. My manual recommended a gap of about 0.030 inches for the M110. Many replacement plugs come pre-gapped, but I always double-check with a spark plug gap tool before installation to avoid misfires.
Where to Buy
I found spark plugs for the Craftsman M110 at local hardware stores, lawn mower dealers, and online retailers like Amazon or Sears PartsDirect. Buying from a reputable source ensures you get a genuine product rather than a cheap imitation.
Tools Needed for Replacement
To replace the spark plug, I used a spark plug socket wrench, a gap gauge, and a pair of pliers. Having the right tools made the job straightforward and safe.
Installation Tips from My Experience
- Make sure the engine is cool before starting.
- Remove the spark plug wire by pulling on the boot, not the wire itself.
- Use the spark plug socket to unscrew the old plug.
- Check the gap on the new plug and adjust if necessary.
- Thread the new plug in by hand to avoid cross-threading.
- Tighten snugly but don’t overtighten, which can damage the threads.
- Reattach the spark plug wire firmly.
Signs It’s Time to Replace Your Spark Plug
From my experience, I noticed these signs indicating a spark plug replacement was overdue: difficulty starting the engine, engine sputtering, reduced power, or increased fuel consumption. Changing the spark plug brought my mower back to life.
Final Thoughts
Replacing the spark plug on my Craftsman M110 was a simple maintenance task that improved my mower’s performance noticeably. By following the manufacturer’s specs and choosing a quality spark plug, you can keep your mower running reliably season after season. I hope my guide helps you make an informed purchase and get your lawn mower back in top shape!
Author Profile
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I’m Charlie Kirby, the writer behind Immu Metrix. My background is in biomedical sciences, and I spent several years working in a health-tech research setting where I evaluated tools, devices, and everyday products through a practical, science-minded lens. That experience shaped the way I look at quality, usability, and how well something actually performs once it leaves the box.
In 2026, I started this blog as a quieter, more thoughtful space to share honest product reviews based on real use and clear explanation. I now spend my days testing items, comparing options, and writing guides that help readers feel confident about what they’re bringing into their homes. Immu Metrix reflects my goal to keep things simple, useful, and grounded in genuine experience.
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