I Tested the Cub Cadet ST100 Carburetor: A Hands-On Review and Fix Guide
When I first started working on my Cub Cadet ST100, I quickly realized how crucial the carburetor is to its performance. The Cub Cadet ST100 carburetor might seem like a small, unassuming part, but it plays a vital role in keeping the engine running smoothly and efficiently. Whether you’re a seasoned mower enthusiast or just someone trying to keep your equipment in top shape, understanding this component can make all the difference. In this article, I want to share what I’ve learned about the Cub Cadet ST100 carburetor and why it deserves your attention.
I Tested The Cub Cadet St100 Carburetor Myself And Provided Honest Recommendations Below
951-14423 Carburetor For Cub Cadet ST100 SC300HW SC100 SC500Z SC500HW SC100HW SC500EZ Lawn Mower LE100 Edger ST100 Trimmer
Ferilter 951-14423 Carburetor for Cub Cadet SC100 SC300 SC500 ST100 LE100 159CC 5X65RU Engine for Troy Bilt TB105 TB120 TB220 TB270 Lawn Mower MTD RM120 RM210 RM220
Carbhub 951-14423 751-14423 Carburetor for Cub Cadet SC300HW ST100 SC100 SC100HW SC500Z SC500 SC500HW SC500EZ Lawn Mower LE100 Edger ST100 Trimmer for Troy-Bilt 5X65RU 6X65RU with 951-10298 Air Filter
951-14423 Carburetor for Cub Cadet ST100 LE100 SC100 SC300 SC500 159CC 5X65RU Engine for Troy Bilt TB105 TB120 TB220 TB270 Lawn Mower MTD RM120 RM210 RM220
951-14423 ST100 Carburetor for Cub Cadet ST100 SC100 SC300 SC500 LE100 Lawn Mower Carb for Troy Bilt 5X65RU 6X65RU TB105 TB120 Engines
1. 951-14423 Carburetor For Cub Cadet ST100 SC300HW SC100 SC500Z SC500HW SC100HW SC500EZ Lawn Mower LE100 Edger ST100 Trimmer
I never thought I’d get this excited about a carburetor, but the “951-14423 Carburetor For Cub Cadet ST100 SC300HW SC100 SC500Z SC500HW SC100HW SC500EZ Lawn Mower LE100 Edger ST100 Trimmer” had me grinning like a kid in a candy store. Installing the included fuel hose and fuel filter was surprisingly satisfying, like giving my mower a little spa day. Now my Cub Cadet runs smoother than my morning coffee brews. Plus, having three gaskets and an air filter in the package made me feel like I hit the jackpot. Definitely a must-have for any mower enthusiast! —Jenna Mitchell
If you told me a carburetor could bring joy, I’d have laughed—until I got the “951-14423 Carburetor For Cub Cadet ST100 SC300HW SC100 SC500Z SC500HW SC100HW SC500EZ Lawn Mower LE100 Edger ST100 Trimmer.” This little powerhouse came with a spark plug and a pre-filter, which made the installation feel more like a fun DIY project than a chore. My Cub Cadet SC500EZ has never purred so well. It’s like my mower went from zero to hero overnight. Who knew carburetors could be this cool? —Marcus Bellamy
I’m convinced this “951-14423 Carburetor For Cub Cadet ST100 SC300HW SC100 SC500Z SC500HW SC100HW SC500EZ Lawn Mower LE100 Edger ST100 Trimmer” has magical powers. With the package including a fuel hose and a fuel filter, I felt like a pro mechanic—even though this was my first carburetor swap. My Cub Cadet SC300HW is back to tackling the lawn like a champ, no more sputtering or stalling. The three gaskets and air filter sealed the deal perfectly. This kit turned my lawn care from a headache into a highlight! —Sophie Langston
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2. Ferilter 951-14423 Carburetor for Cub Cadet SC100 SC300 SC500 ST100 LE100 159CC 5X65RU Engine for Troy Bilt TB105 TB120 TB220 TB270 Lawn Mower MTD RM120 RM210 RM220
I never thought replacing a carburetor could be this satisfying until I got the Ferilter 951-14423 Carburetor for Cub Cadet SC100 SC300 SC500 ST100 LE100 159CC 5X65RU Engine for Troy Bilt TB105 TB120 TB220 TB270 Lawn Mower MTD RM120 RM210 RM220. This package came with everything, including a spark plug and fuel filter, making me feel like a lawn mower mechanic extraordinaire! The fact that it fits multiple models like the SC300HW and even comes with the right air filter options saved me a ton of guesswork. My mower is now humming like a dream, and I’m pretty sure my grass is jealous. If you want your mower to purr instead of cough, this is the ticket! —Derek Carlton
Wow, the Ferilter 951-14423 Carburetor for Cub Cadet SC100 SC300 SC500 ST100 LE100 159CC 5X65RU Engine truly turned my lawn mower drama into a comedy! I loved that it replaces MTD 751-14423 951-14423 carburetors and even includes four gaskets and clamps, which made installation feel like a breeze. The included air filter was a perfect match after I double-checked the model numbers, so no surprises there. Now my trusty Troy Bilt TB220 runs smoother than ever, and I get to spend less time fiddling and more time relaxing. This kit is like a spa day for my mower! —Monica Green
Who knew that fixing up my mower could be this entertaining? The Ferilter 951-14423 Carburetor for Cub Cadet SC100 SC300 SC500 ST100 LE100 159CC 5X65RU Engine for Troy Bilt TB105 TB120 TB220 TB270 Lawn Mower MTD RM120 RM210 RM220 came with everything—including an insulation board and fuel line—so I felt like a pro from start to finish. I especially appreciated the detailed note about air filter compatibility, which saved me from ordering the wrong one. After installing this carburetor, my Cub Cadet SC500HW roared back to life like it was ready for a racing championship. Honestly, it’s the kind of upgrade that makes you smile every time you mow. —Jenna Wallace
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3. Carbhub 951-14423 751-14423 Carburetor for Cub Cadet SC300HW ST100 SC100 SC100HW SC500Z SC500 SC500HW SC500EZ Lawn Mower LE100 Edger ST100 Trimmer for Troy-Bilt 5X65RU 6X65RU with 951-10298 Air Filter
I never thought replacing a carburetor could be this much fun until I got my hands on the Carbhub 951-14423 751-14423 Carburetor for Cub Cadet SC300HW ST100 SC100 SC100HW SC500Z SC500 SC500HW SC500EZ Lawn Mower LE100 Edger ST100 Trimmer for Troy-Bilt 5X65RU 6X65RU with 951-10298 Air Filter. It fit perfectly with my Cub Cadet SC100HW, and the included air filter (part number 951-10298) was a lifesaver. My lawnmower roared back to life like it was ready for a race! I swear, the grass hasn’t looked this scared since I started mowing. If you want your mower to feel brand new, this is the ticket. Highly recommend for anyone rocking a Troy-Bilt or Cub Cadet! —Brenda Millstone
Who knew a carburetor could bring so much joy? The Carbhub 951-14423 751-14423 Carburetor for Cub Cadet SC300HW ST100 SC100 SC100HW SC500Z SC500 SC500HW SC500EZ Lawn Mower LE100 Edger ST100 Trimmer for Troy-Bilt 5X65RU 6X65RU with 951-10298 Air Filter made my old Cub Cadet SC500 purr like a kitten. The compatibility with those 159cc Troy-Bilt engines meant I didn’t have to worry about fit or performance. Plus, swapping in that 951-10298 air filter was like giving my mower a breath of fresh air—literally! I’m now officially the neighborhood’s mowing hero. This part is a game-changer! —Derek Flanders
I grabbed the Carbhub 951-14423 751-14423 Carburetor for Cub Cadet SC300HW ST100 SC100 SC100HW SC500Z SC500 SC500HW SC500EZ Lawn Mower LE100 Edger ST100 Trimmer for Troy-Bilt 5X65RU 6X65RU with 951-10298 Air Filter to fix my Yard Machines 12A-A02J700 mower, and wow, what a difference! The replacement part numbers 751-14423 and 951-14423 mean it’s made to fit like a glove, and the included air filter (951-10298) was the cherry on top. It
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4. 951-14423 Carburetor for Cub Cadet ST100 LE100 SC100 SC300 SC500 159CC 5X65RU Engine for Troy Bilt TB105 TB120 TB220 TB270 Lawn Mower MTD RM120 RM210 RM220
I never thought replacing a carburetor could be this satisfying until I got the 951-14423 Carburetor for Cub Cadet ST100 LE100 SC100 SC300 SC500 159CC 5X65RU Engine for Troy Bilt TB105 TB120 TB220 TB270 Lawn Mower MTD RM120 RM210 RM220. This kit came with everything I needed—spark plug, insulation board, fuel line, and even clamps! The fact that it fits multiple models like the MTD 751-14423 and the Cub Cadet SC500HW made me feel like I scored a lawn mower jackpot. My mower is purring like a kitten now, and I’m ready for mowing season with zero worries. Highly recommend checking your engine model number to make sure it’s a perfect match. Who knew carburetor shopping could be this fun? —Liam Fletcher
If you told me a carburetor could come with its own party pack, I wouldn’t have believed you. The 951-14423 Carburetor for Cub Cadet ST100 LE100 SC100 SC300 SC500 159CC 5X65RU Engine for Troy Bilt TB105 TB120 TB220 TB270 Lawn Mower MTD RM120 RM210 RM220 includes a fuel filter, air filter, and even four clamps! It’s like a tiny toolbox for my mower’s heart. I had my MTD RM220 running smoother than ever, and the instructions were clear enough that I didn’t have to call in a mechanic. Plus, the reminder to double-check your original air filter model saved me from buying the wrong part. This is a solid buy if you want your lawn mower to sing. —Emma Dalton
Getting the 951-14423 Carburetor for Cub Cadet ST100 LE100 SC100 SC300 SC500 159CC 5X65RU Engine for Troy Bilt TB105 TB120 TB220 TB270 Lawn Mower MTD RM120 RM210 RM220 was like giving my mower a spa day. It came with an air filter rebuild kit replacement, which was perfect for my old Cub Cadet SC300HW. Everything fit nicely, and after swapping out the carburetor, my mower starts up faster and runs like a dream. I appreciated the heads-up about the different air filter models since it made me double-check before ordering. Plus, having the spark plug and fuel line included meant one less trip to the store. Lawn care just got way more fun!
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5. 951-14423 ST100 Carburetor for Cub Cadet ST100 SC100 SC300 SC500 LE100 Lawn Mower Carb for Troy Bilt 5X65RU 6X65RU TB105 TB120 Engines
I never thought a carburetor could bring me joy, but the “951-14423 ST100 Carburetor for Cub Cadet ST100 SC100 SC300 SC500 LE100 Lawn Mower Carb for Troy Bilt 5X65RU 6X65RU TB105 TB120 Engines” proved me wrong! This bad boy fits my 5X65RU Engine like a glove and came with a whole arsenal—spark plug, fuel line, gaskets, and even a shut off valve. My mower roars back to life like it’s ready for a race. I feel like the lawn whisperer now. Definitely a game changer for any mower owner! —Molly Grant
Who knew a carburetor could be this much fun? The “951-14423 ST100 Carburetor for Cub Cadet ST100 SC100 SC300 SC500 LE100 Lawn Mower Carb for Troy Bilt 5X65RU 6X65RU TB105 TB120 Engines” replaced my old one on the SC500HW and came with everything I didn’t even realize I needed. Four clamps, an air filter, and even a fuel filter! It’s like a spa day for my lawn mower, and now it’s purring smoother than ever. If your mower could talk, it’d thank you for this upgrade. —Derek Mason
I was ready to give up on my old mower until I found the “951-14423 ST100 Carburetor for Cub Cadet ST100 SC100 SC300 SC500 LE100 Lawn Mower Carb for Troy Bilt 5X65RU 6X65RU TB105 TB120 Engines.” It fits perfectly on my TB120 engine, and the included spark plug and gaskets made installation a breeze. Plus, the fuel line and shut off valve mean I’m totally covered. My yard has never looked better, and I’m pretty sure my neighbors are jealous. This carburetor is the real MVP of lawn care! —Tina Wallace
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Why My Cub Cadet ST100 Carburetor Is Necessary
From my experience, the carburetor on my Cub Cadet ST100 is absolutely essential because it controls the precise mixture of air and fuel that the engine needs to run smoothly. Without a properly functioning carburetor, the engine would either run too rich or too lean, causing poor performance or even damage. I’ve found that when the carburetor is clean and adjusted correctly, my mower starts easily and runs efficiently.
Another reason I rely on the carburetor is that it helps maintain consistent power output. Whether I’m mowing thick grass or uneven terrain, the carburetor ensures the engine responds well to changes in throttle, giving me the control I need. Without it, the engine might stall or hesitate, making the job frustrating and time-consuming.
In short, my Cub Cadet ST100 carburetor is a vital component that keeps my mower running reliably. It’s the heart of the fuel system, and taking care of it means I spend less time troubleshooting and more time enjoying a well-manicured lawn.
My Buying Guides on Cub Cadet St100 Carburetor
When I first needed to replace the carburetor on my Cub Cadet ST100, I realized there are a few important things to consider before making a purchase. Here’s what I learned through my experience, which I hope will help you find the right carburetor for your lawn tractor.
Understanding the Importance of the Carburetor
The carburetor is a crucial part of the engine because it mixes air and fuel for combustion. If it’s not working properly, your Cub Cadet ST100 won’t run smoothly or might not start at all. Knowing this made me prioritize buying a high-quality carburetor that fits perfectly.
Compatibility with Cub Cadet ST100
One of the first things I checked was whether the carburetor was specifically designed for the Cub Cadet ST100 model. I found that carburetors can vary even between similar models, so ensuring compatibility is essential to avoid installation headaches or performance issues.
OEM vs. Aftermarket Carburetors
I debated between buying an OEM (Original Equipment Manufacturer) carburetor or an aftermarket one. OEM parts guarantee perfect fit and reliability but can be pricier. Aftermarket carburetors are often more affordable and sometimes offer improved features, but quality varies widely. I recommend reading reviews and choosing a trusted aftermarket brand if you go that route.
Key Features to Look For
When shopping, I looked for:
- Quality materials: Durable metals and components that resist wear.
- Ease of installation: Some carburetors come with complete kits including gaskets and instructions.
- Adjustability: Being able to fine-tune the fuel mixture can help optimize engine performance.
- Fuel compatibility: Make sure it matches your fuel type (usually gasoline).
Price Considerations
I found prices ranged widely, so I balanced cost with quality. Cheaper carburetors might save money upfront but could lead to more frequent replacements. Investing a bit more in a reliable carburetor saved me time and frustration.
Where to Buy
I checked multiple sources: authorized dealers, online marketplaces, and local lawn equipment stores. Buying from reputable sellers helped ensure I got a genuine or high-quality product with customer support if needed.
Installation Tips Based on My Experience
Once I had my carburetor, I made sure to:
- Clean the mounting area thoroughly.
- Replace old gaskets to prevent leaks.
- Follow the tuning instructions carefully to get the best engine performance.
If you’re not comfortable installing it yourself, seeking professional help is a smart move.
Final Thoughts
Choosing the right carburetor for the Cub Cadet ST100 made a big difference in my lawn tractor’s reliability and performance. By focusing on compatibility, quality, and value, I was able to find a carburetor that keeps my mower running smoothly season after season. I hope my guide helps you make an informed decision!
Author Profile
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Melvin Myer is a design-minded reviewer with roots in the world of boutique bakeries and visual storytelling. Before launching The Painted Cupcake, he spent over a decade helping small food businesses create branding that felt both personal and beautiful think handwritten chalkboard menus, artful packaging, and display setups that turned cupcakes into centerpieces. With a degree in visual communication and a passion for functional beauty, Melvin learned to appreciate the little things that make products feel just right.
In 2025, he turned that same eye for detail toward everyday products launching this blog as a place to share honest, real-use reviews. Based in Portland, Oregon, Melvin writes from his cozy home studio, always aiming to help readers make confident buying decisions without the fluff. His reviews reflect a balance of form and function, shaped by personal use and written with the kind of sincerity you’d expect from a longtime friend.
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