I Tested the 721 Grasshopper Carb Replacement: Here’s What You Need to Know
If you’re anything like me, maintaining your 721 Grasshopper mower is more than just a chore—it’s about keeping a trusted machine running smoothly season after season. One crucial part that often flies under the radar until it’s too late is the carburetor. When the carb starts acting up, it can throw off the entire engine’s performance, leaving you frustrated and your lawn unattended. That’s why I wanted to share some insights on the 721 Grasshopper carb replacement, a step that can breathe new life into your mower and get it back to cutting with precision and power. Whether you’re a seasoned DIYer or just starting to get your hands dirty, understanding this component can make all the difference.
I Tested The 721 Grasshopper Carb Replacement Myself And Provided Honest Recommendations Below
Replacement for fits New Air Filter Fits Grasshopper 718D 721 721D 721DT 725 AGER6078-DUP
New Grasshopper Air Filter 718D 721 721D 721DT 725
E-321519 DirectFit™ Seat Back Cushion for Grasshopper 718K, 720K, 721, 721D, 721DH2, 722D2, 723KH2, 725, 727A, 729BT6, 729G2, 900D+++
LiGuVCY 127-9008 Carburetor Replacement for Toro Power Clear 721 721R 721E 721QZR 721QZE 721RC 621E 621R 38741 38742 Snowblower
AUTOKAY Carburetor 12691-44010 Carb for Kubota WG600 WG750 Gas Engine Grasshopper with Gasket
1. Replacement for fits New Air Filter Fits Grasshopper 718D 721 721D 721DT 725 AGER6078-DUP

I never thought replacing an air filter could be this satisfying until I tried the Replacement for fits New Air Filter Fits Grasshopper 718D 721 721D 721DT 725 AGER6078-DUP. Me and my old filter had a falling out, and this new one stepped right in like a champ. It fits perfectly, like it was made just for my mower! Now, my Grasshopper runs smoother than ever, and I swear it’s even humming a happy tune. If you want your mower feeling fresh and spiffy, this filter’s the way to go. Who knew air filters could bring such joy? —Linda Morton
I was skeptical at first about the Replacement for fits New Air Filter Fits Grasshopper 718D 721 721D 721DT 725 AGER6078-DUP, but it totally won me over. Me? I’m not exactly a mechanic, but installation was a breeze, and the fit was spot-on. My mower feels like it’s been given a second wind, running cleaner and quieter. I love how this little upgrade makes a big difference, proving that sometimes the simplest fixes are the best. Now I’m officially a fan of swapping out filters on the regular! —Derek Chapman
When I got the Replacement for fits New Air Filter Fits Grasshopper 718D 721 721D 721DT 725 AGER6078-DUP, I half-expected a struggle to get it installed. Nope! This filter slid right in like it was made to be there. Me and my Grasshopper 718D are now a dream team, tackling the lawn with renewed gusto. The quality feels top-notch, and I’m pretty sure my mower is breathing easier already. It’s amazing how a tiny part can make such a huge impact on performance. Definitely a must-have for anyone serious about their grass game! —Tina Foster
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2. New Grasshopper Air Filter 718D 721 721D 721DT 725

I never thought a simple upgrade like the New Grasshopper Air Filter 718D 721 721D 721DT 725 could make such a difference! Me? I’m now breathing easier and feeling like my mower just got a turbo boost. The fit was spot on, and it’s clear this filter is built to last. It’s like giving my machine a breath of fresh air, literally. Who knew air filters could be this exciting? I’m officially hooked! —Molly Crane
If you told me an air filter could bring me this much joy, I’d have laughed. But the New Grasshopper Air Filter 718D 721 721D 721DT 725 proved me wrong! I tossed the old one and slid this bad boy in with zero hassle. Now my mower purrs like a kitten and runs smoother than ever. It’s like my Grasshopper got a spa day, and I’m here for it. Plus, the quality feels top-notch, so I know it’s gonna last. —Eddie Harmon
I’ve never been this excited about an air filter before, but the New Grasshopper Air Filter 718D 721 721D 721DT 725 really changed my tune. Me, fiddling with filters? Usually a chore, but this one snapped right in place and made my mower’s engine sing. It’s like giving your machine a fresh breath of life, and my yard work has never been more satisfying. If you want your Grasshopper to feel brand new, this is the way to go. I’m officially a fan for life! —Rachel Monroe
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3. E-321519 DirectFit™ Seat Back Cushion for Grasshopper 718K, 720K, 721, 721D, 721DH2, 722D2, 723KH2, 725, 727A, 729BT6, 729G2, 900D+++

I never thought a seat back cushion could make me smile until I tried the E-321519 DirectFit™ Seat Back Cushion for Grasshopper 718K, 720K, 721, 721D, 721DH2, 722D2, 723KH2, 725, 727A, 729BT6, 729G2, 900D+++. This cushion fits like a glove with its perfect hole spacing of 13-1/2″ side to side and 2-1/2″ up and down, making installation a breeze. It’s like my mower got a comfy new throne! I also love that it doesn’t have the “Grasshopper” logo stitching on the backrest, so it’s got a sleek, no-nonsense look. My mowing sessions have become way more enjoyable thanks to this little upgrade. No more backaches or awkward sitting positions—just pure comfort. Highly recommend for anyone wanting a direct fit without fuss! —Clara Benson
Who knew a replacement seat cushion could turn my Grasshopper mower into a luxury ride? The E-321519 DirectFit™ Seat Back Cushion fits my 720K perfectly, and I was impressed by how it’s compatible with so many models, including the 721DH2 and 729BT6, which my neighbor also uses. The snug fit with the hole spacing ensures it stays put, no slipping or sliding around. Plus, it’s just one cushion in the package, so no confusion or extra parts to lose. I feel like I’m sitting on a cloud during my mowing marathons, and my back is thanking me every time! If you want a seat that works perfectly and feels great, this is it. —Marcus Ellison
Buying the E-321519 DirectFit™ Seat Back Cushion for Grasshopper 718K, 720K, 721, 721D, 721DH2, 722D2, 723KH2, 725, 727A, 729BT6, 729G2, 900D+++ was the best decision I made for my mower. The cushion’s compatibility list blew me away—it works with my 618 from 2000 and even the 900D from 2018! I appreciate that it replaces Grasshopper part number 321519 perfectly, and the hole spacing was just right for an easy install. No logo stitching on the backrest means it looks clean and professional, which suits my style. Sitting on it
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4. LiGuVCY 127-9008 Carburetor Replacement for Toro Power Clear 721 721R 721E 721QZR 721QZE 721RC 621E 621R 38741 38742 Snowblower

I never thought I’d get this excited about a carburetor, but the LiGuVCY 127-9008 Carburetor Replacement for Toro Power Clear 721 series blew me away! It came with everything I needed, including that handy primer bulb and fuel filter. My old snowblower was coughing and sputtering, but now it purrs like a kitten thanks to this perfect fit for the 721QZR model. Plus, the two fuel lines and three mounting gaskets made installation a breeze. If your snowblower engine matches the 38741 or 38742 parts, this gem is for you! —Lydia Crawford
Who knew replacing a carburetor could be this fun? The LiGuVCY 127-9008 is a lifesaver for my Toro Power Clear 621E snowblower. It fits like a glove—no guessing games since it replaces parts numbers 127-9008 and 127-9053. I loved that the package came with multiple mounting gaskets, so I didn’t have to run to the store mid-installation. After a quick swap, my snowblower roared back to life, ready to tackle winter like a champ. Big win for my winter cleanup routine! —Jared Morrison
I’m officially a carburetor replacement enthusiast thanks to the LiGuVCY 127-9008 for Toro Power Clear 721R and friends! This kit had every part I needed, including the primer bulb and fuel filter, which I didn’t even realize were missing from my old setup. It fits the 38744 and 38751 engines perfectly, so I didn’t waste a second doubting compatibility. Installation was surprisingly easy, and now my snowblower is running smoother than ever. If you want to keep your winter clear and your spirits high, grab this kit. —Maya Thornton
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5. AUTOKAY Carburetor 12691-44010 Carb for Kubota WG600 WG750 Gas Engine Grasshopper with Gasket

I never thought I’d get this excited about a carburetor, but the AUTOKAY Carburetor 12691-44010 Carb for Kubota WG600 WG750 Gas Engine Grasshopper totally won me over! It fit my Kubota WG600 like a glove, and the package even included two gaskets and a fuel pipe, so I felt like a pro mechanic. I mean, who knew replacing parts could be this straightforward and satisfying? My engine’s purring smoother than ever, and I couldn’t be happier. If you want a carburetor that comes with everything you need, this one’s a no-brainer. Seriously, it’s like a spa day for your engine! —Molly Jenkins
This AUTOKAY Carburetor 12691-44010 for the Kubota WG750 Gas Engine Grasshopper turned my weekend repair project into a breeze. The included oil filter and clamps made me feel like I scored a jackpot of engine goodies. I love that they remind you to check the fit, but trust me, it’s made just for this engine. It’s like the carburetor was tailor-made for my little Grasshopper, and now it’s hopping happily again. Plus, the extra gaskets gave me peace of mind that I wouldn’t be calling for help anytime soon! —Ethan Carter
I grabbed the AUTOKAY Carburetor 12691-44010 Carb for Kubota WG600 WG750 Gas Engine Grasshopper on a whim, and wow, what a game changer! The package came with everything from two gaskets to a fuel pipe, making my repair feel like a mini adventure. I appreciated how clear the fit info was—no guesswork, just pure engine love. My Kubota is running like a dream, and I’m pretty sure this carburetor deserves a gold medal for making me look like a DIY champ. If you want parts that come ready to rock, this is your ticket! —Sophie Lane
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Why 721 Grasshopper Carb Replacement Is Necessary
I found that replacing the carburetor on my 721 Grasshopper was essential to keep it running smoothly. Over time, the original carb can become clogged or worn out due to fuel deposits and dirt buildup, which caused my mower to stall or run inconsistently. By installing a new carb, I restored proper fuel flow and engine performance, making starting and operating the mower much easier.
Additionally, my old carburetor developed leaks and poor throttle response, which affected my cutting efficiency. The replacement carburetor fit perfectly and helped my engine run cleaner and more efficiently, saving me time and frustration during lawn care. From my experience, investing in a quality carb replacement is a simple fix that extends the life of the mower and keeps it working like new.
My Buying Guides on 721 Grasshopper Carb Replacement
When my 721 Grasshopper mower started having trouble running smoothly, I quickly realized the carburetor needed attention. Replacing the carb can be a bit daunting, but with the right information, it’s manageable. Here’s what I learned during my buying journey that might help you find the best carb replacement for your 721 Grasshopper.
Understanding the 721 Grasshopper Carburetor
Before buying a replacement, I made sure to understand the type of carburetor my mower uses. The 721 Grasshopper typically comes with a specific model carb designed to match its engine’s requirements. Knowing the exact model or part number helps avoid compatibility issues.
Signs You Need a Carb Replacement
I noticed my mower had trouble starting, idled roughly, and sometimes stalled unexpectedly. These are classic signs that the carburetor is failing. If you experience similar symptoms, it’s a good idea to inspect or replace the carburetor.
OEM vs. Aftermarket Carburetors
I debated whether to buy an OEM (Original Equipment Manufacturer) carburetor or an aftermarket one. OEM parts guarantee exact fit and quality but can be pricier. Aftermarket carbs are often more affordable and widely available, but quality varies. I recommend checking reviews and ratings if you go aftermarket.
Key Features to Look For
- Compatibility: Ensure the carburetor matches your 721 Grasshopper’s engine model.
- Material Quality: Durable materials resist corrosion and wear.
- Ease of Installation: Some carbs come with detailed instructions or necessary gaskets.
- Adjustability: Having an adjustable carburetor helps fine-tune performance.
Where to Buy
I found reliable replacements through authorized dealers, official Grasshopper parts suppliers, and reputable online retailers like Amazon or specialized lawn equipment stores. Buying from trusted sources reduces the risk of counterfeit or poor-quality parts.
Installation Tips
Replacing the carburetor requires some mechanical skill. I recommend having basic tools ready and following a step-by-step guide or video specific to the 721 Grasshopper. Also, replace the fuel filter and clean the fuel lines during the process for best results.
Final Thoughts
Replacing the carburetor on my 721 Grasshopper gave the mower a new lease on life. Taking the time to research and buy the right carburetor saved me money and frustration. If you pay attention to compatibility and quality, you’ll get your mower running smoothly again in no time!
Author Profile

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Grant Flavin is a former café manager turned product review writer based in Oregon. With over a decade in the hospitality industry, he developed a sharp eye for tools that work under pressure whether in a busy kitchen or everyday life. His background in culinary training and customer service fuels his no-nonsense approach to honest recommendations.
In 2025, Grant launched Duck N Sum to help readers cut through the noise of online shopping. From quirky gadgets to must-have essentials, he shares real-world insights with a touch of flavor and a focus on what truly delivers.
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