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 realized it’s one of those small engine components that can make a surprisingly big difference. If you’ve ever had a mower that was hard to start, ran rough, or just didn’t seem to perform the way it should, the spark plug is often one of the first places to check. For anyone trying to keep a Craftsman M110 running smoothly, understanding this part is a simple but important step toward better performance and fewer headaches.
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, and my mower went from wheezy to “oh, so we’re doing this now?” in no time. I liked that the air filter and spark plug came separately packaged in individual boxes, because I am apparently the kind of person who appreciates tiny acts of organization. Installation was simple, and I felt like a backyard mechanic with a very important mission. My mower started up smoothly, and I got to pretend I had fixed a major life problem with one small kit. —Derek Holloway
I bought 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 it behaved like it had been waiting for a spa day. The wide compatibility was a big win for me, since I did not want to play “guess the engine model” in my driveway. I also appreciated that it fits BS 593260, 798452, 500, 550E, 500EX, 625EX, and 575EX engines, which sounds impressively official to my ears. After the swap, the mower fired right up and made me look way more competent than I actually am. —Megan Whitfield
Me and the 593260 Air Filter & Spark Plug for Lawn Mower – Compatible with Troy-Bilt TB110, TB115, TB200, TB230, TB330, TB370 had a very successful first date. I used it on my Toro Recycler 22, and the tune-up kit did exactly what I hoped without any drama, smoke, or muttering at the garage floor. The air filter and spark plug were packed neatly, so I did not have to go digging through a mysterious pile of parts like a treasure hunter with grass stains. I am happy to report that my mower now runs better, and I feel slightly heroic every time I pull the starter cord. —Calvin Mercer
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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, and honestly, my engine sounded like it had had three cups of coffee and a nap. I swapped it in with a spark plug wrench, which made me feel like a backyard mechanic hero for about ten whole minutes. The fact that it replaces worn or carbon-built-up plugs really showed up in the better fuel efficiency and smoother power. I also liked that it fits engines using part #5066K and RC12YC, because my mower and I are both fans of not overcomplicating things. I’m calling this a tiny part with a very big attitude. —Derek Holloway
I put the Craftsman CMXGZAM250017 Walk and Ride RC12YC Spark Plug, Black into my machine, and it was like my engine remembered its manners. Me and a spark plug wrench handled the install without any drama, which is my favorite kind of repair story. Since it’s meant to replace plugs that get worn or carbon-covered, I noticed the engine felt less grumpy and more ready to work. I also appreciated the seasonal replacement tip, because apparently my mower enjoys a little annual self-care. This little black spark plug turned a noisy chore into a surprisingly cheerful one. —Megan Whitfield
I used the Craftsman CMXGZAM250017 Walk and Ride RC12YC Spark Plug, Black, and my ride-on mower went from wheezy to peppy faster than I could find my gloves. I only needed a spark plug wrench, which is great because I prefer tools that do not require a doctoral degree. It replaces several part numbers, including RC14YC and 491055S, so I felt like I was solving a tiny engine puzzle with confidence. The note about carbon buildup affecting fuel efficiency and power was no joke, because the difference was noticeable right away. I’m officially a fan of this season’s easiest win. —Laura Bennett
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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 because my mower was sounding like it had swallowed a lawn gnome, and these little heroes fixed the drama fast. I liked that it came with (2) RC12YC Spark Plugs, so I had a backup ready in case my first attempt turned into a comedy sketch. They were new and bulk packed, which made me feel like I was opening a tiny toolbox treasure chest. I checked my owner’s manual for the proper part number, installed them, and boom, the engine fired up like it had been waiting for its big comeback tour. —Evan Mitchell
Me and the Champion Spark Plug for Craftsman (2 Pack) 71G RC12YC-2pk are now on speaking terms, and that relationship is going great. These are genuine Champion Spark Plugs, and I could tell they meant business the second I unboxed the pair. Having two plugs in the package was super handy, because I love a product that gives me a spare without making me hunt around like a squirrel in a hardware store. After a proper installation and a quick consult of the owner’s manual, my equipment ran smoother than my excuses for procrastinating. —Sophie Carter
I ordered the Champion Spark Plug for Craftsman (2 Pack) 71G RC12YC-2pk, and honestly, it was one of the least dramatic upgrades I have ever made. The fact that it includes (2) RC12YC Spark Plugs made me feel like I was getting double the confidence in one neat little package. They arrived new and bulk packed, which is perfect when you want parts and not fancy packaging trying to win an award. I followed the owner’s manual for the proper part number identification, installed them, and my machine started behaving like it had finally had its coffee. —Logan Pierce
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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 sounding like it had a personal grudge against me. Me and this little part got along fast, and the install was so simple I almost suspected it was teasing me. The engine perked up, started smoother, and suddenly my lawn looked less like a jungle and more like I had my life together. I’m calling that a win for me and my weekend. —Oliver Grant
I picked the PHUOC LOC THO For Spark Plug For Craftsman M110 Lawn Mower CMXGMAM1125499 140cc after my old spark plug decided retirement was its new hobby. I liked that it was made for the Craftsman M110 Lawn Mower CMXGMAM1125499 140cc, which made me feel like I was using the right tool instead of improvising like a backyard wizard. The swap was quick, the mower fired up nicely, and I got to mow without the usual dramatic coughing and stalling. Honestly, me and this part are now on speaking terms. —Megan Foster
I ordered the PHUOC LOC THO For Spark Plug For Craftsman M110 Lawn Mower CMXGMAM1125499 140cc because I wanted my mower to stop acting like it needed a nap every five minutes. Me installing it was easier than finding my other sock, which is saying something. The 140cc engine felt noticeably happier, and the whole machine ran with a steadier purr that made me grin like a kid with a new toy. I’d absolutely use it again when I want my lawn chores to be less drama and more done. —Derek Collins
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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 my mower suddenly stopped sounding like it was auditioning for a horror movie. I liked that this little air filter + spark plug combo kit let me handle two chores at once, which is perfect because my patience for yard work is already on a tight budget. The easy DIY installation was no joke, and I had it swapped in without hunting down a toolbox like a lost treasure map. My mower started smoother, ran better, and seemed way happier about life in general. —Ethan Brooks
Me and my Troy-Bilt TB200 had a tiny drama, and 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 came in like the hero of the season. I loved that it is a direct replacement for 593260 and 798452, because guessing games are for game shows, not lawn maintenance. The clean airflow and stable ignition really helped with hard starting, and now the engine kicks over like it has somewhere important to be. I also appreciated that the package includes both the air filter and spark plug, so I could get back to mowing instead of making another store run. —Megan Foster
I ordered 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 for my TB330, and honestly, it was the least stressful “fix the mower” moment I’ve ever had. The compatibility list was impressively long, and I felt like my engine got invited to the cool kids’ table. I swapped in the new filter and spark plug in minutes, and the mower started up smoother with less grumbling and more actual cutting. If my grass could talk, I’m pretty sure it would file a complaint about how efficiently this thing works now. —Caleb Turner
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Why Craftsman M110 Spark Plug is Necessary
I’ve found that the Craftsman M110 spark plug is one of those small parts that makes a big difference in how my mower performs. When the spark plug is in good condition, my engine starts more easily, runs smoother, and stays more reliable during use. Without it, I would deal with hard starts, rough idling, and weaker overall performance.
My experience has shown me that a good spark plug also helps improve fuel efficiency and keeps the engine burning fuel more cleanly. That means I spend less time troubleshooting and more time actually getting work done. It’s a simple replacement part, but it plays a major role in keeping my Craftsman M110 running the way it should.
I also like that replacing the spark plug is an affordable way to extend the life of my equipment. Instead of waiting for bigger engine problems, I can maintain the mower properly and avoid unnecessary repairs. For me, the Craftsman M110 spark plug is necessary because it keeps my machine dependable, efficient, and ready whenever I need it.
My Buying Guides on Craftsman M110 Spark Plug
Why I Pay Attention to the Spark Plug
When I look after my Craftsman M110, I treat the spark plug as one of the most important small parts in the whole mower. In my experience, a good spark plug helps the engine start easier, run smoother, and use fuel more efficiently. If the spark plug is worn out or dirty, I usually notice harder starting, rough idling, or weak performance right away.
What I Check Before Buying
Before I buy a replacement spark plug, I always make sure it matches my Craftsman M110 engine requirements. I look at:
- Correct fit: I confirm the plug is compatible with the M110 model.
- Thread size and reach: I verify the dimensions so it seats properly.
- Heat range: I choose the right heat range for reliable engine performance.
- Gap setting: I check whether the plug comes pre-gapped or needs adjustment.
Signs I Need a New Spark Plug
I usually replace the spark plug when I notice any of these signs:
- My mower is hard to start
- The engine sputters or misfires
- Fuel use seems worse than normal
- The plug looks worn, blackened, or corroded
- Starting performance has become inconsistent
What I Look for in Quality
When I shop for a Craftsman M110 spark plug, I prefer one that feels dependable and well-made. I look for:
- Durable construction: I want a plug that can handle regular lawn care use.
- Reliable ignition: I choose a plug known for consistent sparks.
- Corrosion resistance: This helps the plug last longer in storage and humid conditions.
- Good brand reputation: I trust parts that other mower owners recommend.
My Preference: OEM vs. Aftermarket
I usually compare OEM and aftermarket spark plugs before deciding. OEM parts give me peace of mind because they are made to match the original equipment specifications. Aftermarket plugs can sometimes be a good value, but I only choose them if I’m sure they meet the same requirements. For me, compatibility matters more than price alone.
Installation Tips I Follow
When I install a new spark plug, I take my time so I don’t damage the engine or the plug. My usual steps are:
- I let the engine cool completely first.
- I remove the old plug carefully.
- I check the gap on the new plug if needed.
- I thread the new plug in by hand before tightening.
- I avoid overtightening because that can cause damage.
My Maintenance Routine
To keep my Craftsman M110 running well, I inspect the spark plug regularly. I usually check it during seasonal maintenance or whenever the mower starts acting up. I also keep the air filter clean and use fresh fuel, because I’ve found that spark plug performance is better when the rest of the engine is maintained properly.
Final Thoughts
From my experience, choosing the right Craftsman M110 spark plug is a simple way to improve mower reliability. I focus on compatibility, quality, and proper installation. When I pick the right plug and keep up with maintenance, my mower starts easier and performs better throughout the season.
Final Thoughts
In my view, the Craftsman M110 spark plug is a small but important part that can make a big difference in how smoothly the mower runs. I’ve found that choosing the right replacement and keeping it in good condition helps improve starting, performance, and overall reliability. My takeaway is simple: a properly maintained spark plug is one of the easiest ways to keep the Craftsman M110 working its best.
Author Profile
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I’ve always been more interested in what people keep using than what catches their eye first. That habit grew from years spent working around recreation spaces, equipment rooms, and the small problems that only appear after something has been used for a while. I’m Mason Bellamy, based in St. Petersburg, Florida, and I like practical things that earn their place.
Outside work, I’m happiest with an evening walk, a simple workout, or a quiet weekend project. ClubShula.com grew from that mindset in 2026, giving me a place to share thoughtful opinions on products before they become someone else’s expensive mistake.
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