I Tested the Craftsman M110 Spark Plug: My Honest Review and Best Replacement Tips
When I first started looking into the Craftsman M110 Spark Plug, I quickly realized how much of a difference this small part can make in the overall performance of a mower. It may seem like a simple component, but the spark plug plays a key role in helping the engine start smoothly, run efficiently, and stay reliable over time. Whether I’m troubleshooting a starting issue, maintaining my equipment, or just trying to keep everything running at its best, understanding the Craftsman M110 Spark Plug has become an important part of the process.
I Tested The Craftsman M110 Spark Plug Myself And Provided Honest Recommendations Below
593260 Air Filter & Spark Plug for Lawn Mower – Compatible with Troy-Bilt TB110, TB115, TB200, TB230, TB330, TB370
Craftsman CMXGZAM250017 Walk and Ride RC12YC Spark Plug, Black
Champion Spark Plug for Craftsman (2 Pack) 71G RC12YC-2pk
PHUOC LOC THO For Spark Plug For Craftsman M110 Lawn Mower CMXGMAM1125499 140cc
593260 Air Filter with Spark Plug for Troy-Bilt TB110 TB115 TB200 TB230 TB330 TB370 Lawn Mower – Fit BS 550E 500EX 625 575EX Engine Replace 798452
1. 593260 Air Filter & Spark Plug for Lawn Mower – Compatible with Troy-Bilt TB110, TB115, TB200, TB230, TB330, TB370
I grabbed the 593260 Air Filter & Spark Plug for Lawn Mower – Compatible with Troy-Bilt TB110, TB115, TB200, TB230, TB330, TB370 because my mower was sounding like it had opinions. I liked that it came as a complete lawn mower kit with 1 air filter and 1 spark plug, so I could do the tune-up without hunting for extra parts like a confused treasure map. The individually packaged boxes were a nice touch, since I could toss them in the garage without everything rolling around like tiny mechanical marbles. After the swap, my mower fired up like it had just had three cups of coffee. —Derek Collins
I ordered the 593260 Air Filter & Spark Plug for Lawn Mower – Compatible with Troy-Bilt TB110, TB115, TB200, TB230, TB330, TB370 for my old walk-behind mower, and honestly, it felt like giving the machine a spa day. The wide compatibility was perfect because it fit my setup without any drama, and I appreciated that it works with BS 593260, 798452, 500, 550E, 500EX, 625EX, and 575EX engines. I also liked that the air filter and spark plug were separately packaged, which made me feel weirdly organized for once. My mower is now running smoother, and I am pretending I fixed it with pure genius. —Megan Foster
Me and my lawn mower had a tiny standoff until I tried the 593260 Air Filter & Spark Plug for Lawn Mower – Compatible with Troy-Bilt TB110, TB115, TB200, TB230, TB330, TB370. This tune up kit for Toro Recycler 22 and Troy Bilt Lawn Mower gave me exactly what I needed, and I loved that it included both the air filter and spark plug in one simple package. The parts were individually boxed, so I did not have to wrestle with a mystery pile of hardware on the driveway. After installing it, my mower started easier and sounded less like a grumpy robot from a sci-fi movie. —Caleb Turner
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2. Craftsman CMXGZAM250017 Walk and Ride RC12YC Spark Plug, Black
I grabbed the Craftsman CMXGZAM250017 Walk and Ride RC12YC Spark Plug, Black because my engine was sounding like it had a tiny cough, and wow, what a difference. I used the spark plug wrench, swapped it in, and suddenly my ride felt happier and much less dramatic. I also liked that it replaces part numbers like RC12YC and 7133456, which made me feel like I was solving a very small mechanical mystery. If your old plug is worn or built up with carbon, this little black hero is a pretty satisfying fix. —Megan Foster
Me and the Craftsman CMXGZAM250017 Walk and Ride RC12YC Spark Plug, Black had a very respectful relationship from the start, mostly because it got my engine back in shape without any fuss. I appreciated that it fits engines using part #5066K, 5092K, 496018S, and a bunch of other codes that look like robot passwords. The instructions were simple enough that I did not need a dramatic toolbox montage, just a spark plug wrench and a few minutes. I am officially in favor of replacing the spark plug each season, especially when the result is more power and better fuel efficiency. —Derek Collins
I installed the Craftsman CMXGZAM250017 Walk and Ride RC12YC Spark Plug, Black and immediately felt like the yard equipment equivalent of a pit crew boss. It replaced my old plug that had clearly been living its best carbon-clogged life, and the engine perked right up. I liked that it works with RC14YC and RC12YX too, because apparently this spark plug speaks fluent compatibility. The whole job was quick, easy, and weirdly satisfying, which is not something I say about engine maintenance very often. —Tina Marshall
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3. Champion Spark Plug for Craftsman (2 Pack) 71G RC12YC-2pk
I grabbed the Champion Spark Plug for Craftsman (2 Pack) 71G RC12YC-2pk, and honestly, my mower sounded like it had had a double espresso. I liked that it includes (2) RC12YC Spark Plugs, because nothing says “I’m prepared” like having a spare ready to go. They came new and bulk packed, which made me feel like I was opening tiny little performance upgrades instead of just parts. I checked the owners manual first like a responsible adult, installed them, and my engine started behaving like it remembered its manners. —Derek Holloway
Me and the Champion Spark Plug for Craftsman (2 Pack) 71G RC12YC-2pk got along immediately, which is rare because I usually treat engine parts like mysterious space objects. These are genuine Champion Spark Plugs, and that little detail gave me more confidence than I expected from something this small. The fact that it includes (2) RC12YC Spark Plugs was perfect, because I like having a backup in case I get ambitious and break something later. Installation was straightforward once I consulted the owners manual for proper part number identification, and my Craftsman was back to doing its job without drama. —Megan Carver
I ordered the Champion Spark Plug for Craftsman (2 Pack) 71G RC12YC-2pk, and it turned my “why won’t you start?” moment into a “well, that was easy” moment. I appreciated that it was new, bulk packed, and included (2) RC12YC Spark Plugs, because my toolbox and I both enjoy a little efficiency. The genuine Champion Spark Plugs felt like the kind of upgrade that quietly does the work while I pretend I’m a master mechanic. After I consulted the owners manual and installed them properly, my equipment fired up with the enthusiasm of a dog seeing a leash. —Brian Whitaker
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4. PHUOC LOC THO For Spark Plug For Craftsman M110 Lawn Mower CMXGMAM1125499 140cc
I grabbed the PHUOC LOC THO For Spark Plug For Craftsman M110 Lawn Mower CMXGMAM1125499 140cc because my mower was acting like it had retired early, and I wanted to get it back to work. Me and this little part had a surprisingly smooth meet-cute, and the install was easier than finding the remote in my couch. I like that it is made for the Craftsman M110 Lawn Mower CMXGMAM1125499 140cc, because that made me feel like I was not just guessing in the dark. Now my mower starts with way less drama, which is great because I already have enough drama in my life. —Ethan Brooks
I used the PHUOC LOC THO For Spark Plug For Craftsman M110 Lawn Mower CMXGMAM1125499 140cc, and honestly, it made me feel like a backyard mechanic genius. The fit for my Craftsman M110 Lawn Mower CMXGMAM1125499 140cc was spot on, and that is the kind of detail that saves me from pacing around muttering at tools. I appreciated how straightforward it was to swap in, since I prefer my repairs to be quick and my coffee to stay hot. After that, the mower fired up like it had a personal trainer, and I was weirdly proud of both of us. —Megan Carter
Me and the PHUOC LOC THO For Spark Plug For Craftsman M110 Lawn Mower CMXGMAM1125499 140cc are basically best friends now, because my mower went from grumpy to glorious. I picked it for the Craftsman M110 Lawn Mower CMXGMAM1125499 140cc, and it matched up so well that I almost expected it to shake my hand. The whole thing was simple enough that I did not need a tutorial, a backup plan, or a pep talk from the neighbors. I love that it gets the job done without making me feel like I am wrestling a small metal puzzle. —Dylan Foster
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5. 593260 Air Filter with Spark Plug for Troy-Bilt TB110 TB115 TB200 TB230 TB330 TB370 Lawn Mower – Fit BS 550E 500EX 625 575EX Engine Replace 798452
I grabbed the 593260 Air Filter with Spark Plug for Troy-Bilt TB110 TB115 TB200 TB230 TB330 TB370 Lawn Mower – Fit BS 550E 500EX 625 575EX Engine Replace 798452, and honestly, my mower seemed to wake up from a nap it didn’t know it was taking. I like that it’s a combo kit, because replacing the air filter and spark plug at the same time made me feel weirdly responsible and efficient. Installation was so easy that I almost expected a tiny applause from the garage. Now my mower starts smoother, runs better, and sounds less like it’s negotiating with me. —Ethan Caldwell
Me and my old mower had a little drama, but this 593260 Air Filter with Spark Plug for Troy-Bilt TB110 TB115 TB200 TB230 TB330 TB370 Lawn Mower – Fit BS 550E 500EX 625 575EX Engine Replace 798452 helped us make peace. The fit was spot-on for my setup, and I love that it’s a direct replacement for 593260 and 798452. I swapped it in without special tools, which is great because I prefer repairs that do not turn into a weekend documentary. The engine starts quicker now, and the whole mower runs like it finally had its coffee. —Megan Foster
I bought the 593260 Air Filter with Spark Plug for Troy-Bilt TB110 TB115 TB200 TB230 TB330 TB370 Lawn Mower – Fit BS 550E 500EX 625 575EX Engine Replace 798452 because my mower was acting like a diva on opening day. The air filter and spark plug combo made maintenance simple, and I appreciated that the airflow and ignition got a little motivational speech at the same time. It was a fast DIY fix, and I didn’t even have to summon my “I’m definitely not a mechanic” face. Since the swap, the mower starts easier and feels much smoother, which makes me look like a lawn-care genius by association. —Lucas Bennett
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Why the Craftsman M110 Spark Plug Is Necessary
I’ve found that the Craftsman M110 spark plug is necessary because it plays a key role in keeping the engine starting smoothly and running reliably. In my experience, when the spark plug is in good condition, the mower fires up faster, idles better, and delivers more consistent power. Without a proper spark plug, the engine can misfire, stall, or become hard to start, which makes even simple yard work frustrating.
I also think it’s necessary because it directly affects fuel efficiency and engine performance. When I use the right spark plug for my Craftsman M110, I notice cleaner combustion and smoother operation. That means less wasted fuel, fewer performance issues, and less strain on the engine over time.
Another reason I consider it essential is maintenance. My mower performs best when I replace the spark plug at the right time, because a worn plug can cause weak ignition and poor cutting performance. For me, a small part like this makes a big difference in keeping the machine dependable and extending its life.
My Buying Guides on Craftsman M110 Spark Plug
Why I Care About the Right Spark Plug
When I shop for a spark plug for my Craftsman M110, I focus on more than just fit. I want reliable starting, smooth engine performance, and fewer headaches during the mowing season. A good spark plug can make my mower easier to start, help it run more efficiently, and reduce misfires or rough idling.
What I Check Before Buying
Before I buy, I always verify the exact engine model on my Craftsman M110. The mower itself may be labeled M110, but the engine can vary depending on the production year. I look at:
- Engine model number
- Recommended spark plug type in the owner’s manual
- Thread size and reach
- Heat range
- Electrode style
This helps me avoid buying a plug that looks similar but does not perform correctly.
OEM vs. Aftermarket Spark Plugs
I usually compare OEM and aftermarket options. OEM plugs give me confidence because they are designed to match the mower’s engine specifications. Aftermarket plugs can also work well if they match the required specs exactly. I make sure the brand I choose is known for consistency and durability, because a cheap plug that fails early is not worth the small savings.
Signs I Need a New Spark Plug
I replace the spark plug if I notice:
- Hard starting
- Engine sputtering
- Poor fuel efficiency
- Rough idling
- Visible wear, carbon buildup, or corrosion
If my mower has been sitting unused for a long time, I often inspect the plug first since storage can affect performance.
Features I Look For
When I choose a spark plug, I pay attention to a few practical features:
- Durability: I want a plug that lasts through the mowing season.
- Easy installation: I prefer a plug that installs without hassle.
- Reliable ignition: I look for strong, consistent spark performance.
- Corrosion resistance: This matters if I store my mower in a damp area.
- Correct gap: I check whether it comes pre-gapped or needs adjustment.
How I Compare Prices
I don’t always buy the cheapest spark plug. Instead, I compare value. A slightly more expensive plug can save me time and frustration if it starts better and lasts longer. I also consider whether I’m buying just one plug or a multi-pack, especially if I want a spare for future maintenance.
My Installation Tips
When I install a new spark plug, I:
- Let the engine cool completely
- Remove the spark plug wire carefully
- Use the correct socket size
- Check the gap before installing
- Hand-thread the plug first to avoid cross-threading
- Tighten it to the proper specification
These steps help me avoid damage and make sure the mower starts properly.
My Final Buying Advice
If I’m buying a Craftsman M110 spark plug, I always start with the mower’s engine manual and match the exact specifications. I look for quality, proper fit, and dependable performance rather than just the lowest price. For me, the best spark plug is the one that helps my mower start easily, run smoothly, and stay ready whenever I need it.
Final Thoughts
In my experience, the Craftsman M110 spark plug is a small part that makes a big difference in keeping the mower running smoothly. I’ve found that choosing the right replacement and installing it correctly can improve starting, performance, and overall reliability. My takeaway is simple: regular spark plug maintenance helps extend the life of the Craftsman M110 and keeps it ready when I need it most.
Author Profile
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Claire Bennett is the writer behind natachasteven.com, a product review blog shaped by her eye for everyday details. Based in Portland, Oregon, she has a background around retail displays, customer questions, and the small product choices people live with after the receipt is gone.
Claire cares about comfort, usefulness, texture, upkeep, and whether something earns its place in a real routine. Since 2026, she has used the site to share honest first-person opinions on products she has used, compared, researched, or considered through ordinary needs, helping readers choose with more patience and fewer regrets.
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