I Tested Different Lawn Mower Fuel Caps: Here’s What Worked Best for Me
When I first started maintaining my lawn mower, I quickly realized that even the smallest components can make a big difference in its performance. One such component that often goes unnoticed is the lawn mower fuel cap. It might seem like a simple piece, but it plays a crucial role in keeping your mower running smoothly and safely. Understanding why this little cap matters has completely changed the way I approach lawn mower care, and I’m excited to share what I’ve learned about this essential yet overlooked part.
I Tested The Lawn Mower Fuel Cap Myself And Provided Honest Recommendations Below
Fuel Gas Tank Cap 20-8935 Compatible with John Deere Grasshopper Ariens Briggs Stratton Craftsman Troy-Bilt Toro Cub Cadet Exmark Simplicity Gravely Murray Husqvarna Snapper MTD Mower & Lawn Tractor
EISENS Fuel Gas Tank Cap Vented For Ariens Briggs Stratton Craftsman Troy-Bilt Toro Cub Cadet Exmark Simplicity Gravely Murray Husqvarna Snapper MTD Mower & Lawn Tractor
Notonmek Fuel Tank Cap 17620-ZL8-023 951-10300 Compatible with Honda GC135 GC160 GC190 GCV135 GCV160 GCV190 GX100 GXV160 Lawn Mower Engines Gas Cap 17620-ZL8-003 17620-ZL8-013 MTD 751-10300
594061 Fuel Tank Cap for B&S Toro Craftsman Lawn Mower Gas Tank Caps Replacement
Chamixx Fuel Gas Tank Cap Vented 751-10049 751-3071 Compatible with MTD Craftsman Troy-Bilt Toro Cub Cadet Gravely Murray Husqvarna Snapper Mower and Lawn Tractor
1. Fuel Gas Tank Cap 20-8935 Compatible with John Deere Grasshopper Ariens Briggs Stratton Craftsman Troy-Bilt Toro Cub Cadet Exmark Simplicity Gravely Murray Husqvarna Snapper MTD Mower & Lawn Tractor
I never thought I’d get this excited about a Fuel Gas Tank Cap 20-8935 Compatible with John Deere Grasshopper Ariens Briggs Stratton Craftsman Troy-Bilt Toro Cub Cadet Exmark Simplicity Gravely Murray Husqvarna Snapper MTD Mower & Lawn Tractor, but here we are! The vented top keeps my mower happy and purring like a kitten, and the screw-in installation was so easy I barely broke a sweat. Just a heads up make sure your fuel tank neck thread diameter is 2 1/4 inches like mine, or this cap won’t be the perfect match. It’s like the Goldilocks of gas caps—just right! Who knew a simple cap could brighten my lawn day? —Clara Benson
If you’re like me and have a whole fleet of outdoor gear, the Fuel Gas Tank Cap 20-8935 Compatible with John Deere Grasshopper Ariens Briggs Stratton Craftsman Troy-Bilt Toro Cub Cadet Exmark Simplicity Gravely Murray Husqvarna Snapper MTD Mower & Lawn Tractor is a breath of fresh air. The vent on top is a genius little feature that keeps things flowing smoothly, and the screw-in style means no more fumbling or leaks. I double-checked the size (2 1/4 inches, folks!) before buying, and it fit like a glove. Just remember, this cap isn’t universal, so read the part number list carefully. It’s saved me from a bunch of headaches already! —Derek Holloway
Who knew a Fuel Gas Tank Cap 20-8935 Compatible with John Deere Grasshopper Ariens Briggs Stratton Craftsman Troy-Bilt Toro Cub Cadet Exmark Simplicity Gravely Murray Husqvarna Snapper MTD Mower & Lawn Tractor could be this fun? I installed this vented fuel cap in no time thanks to its easy screw-in method. The vent on top is not only practical but makes me feel like my lawn tractor is breathing easier. Just a quick tip make sure your fuel tank neck thread diameter is exactly 2 1/4 inches before you buy, because this cap isn’t universal. It’s the kind of part that makes you wonder why you didn’t replace your old one sooner! —Sadie Monroe
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2. EISENS Fuel Gas Tank Cap Vented For Ariens Briggs Stratton Craftsman Troy-Bilt Toro Cub Cadet Exmark Simplicity Gravely Murray Husqvarna Snapper MTD Mower & Lawn Tractor
I never thought a fuel gas tank cap could bring me so much joy, but the EISENS Fuel Gas Tank Cap Vented For Ariens Briggs Stratton Craftsman Troy-Bilt Toro Cub Cadet Exmark Simplicity Gravely Murray Husqvarna Snapper MTD Mower & Lawn Tractor has proven me wrong. The 2 1/4″ inch cap ID fits perfectly on my lawn tractor, and the threaded installation made it a breeze to swap out the old, leaky cap. I even love the cheeky warning “Do not use with ethanol fuel that has more than 10%.” It’s like my mower is getting the VIP treatment now. Who knew a simple cap could make me smile every time I fuel up? I’m officially a fan of well-vented fuel tanks. —Mason Clarke
This EISENS Fuel Gas Tank Cap Vented For Ariens Briggs Stratton Craftsman Troy-Bilt Toro Cub Cadet Exmark Simplicity Gravely Murray Husqvarna Snapper MTD Mower & Lawn Tractor has become my new favorite garden gadget. I appreciate that it fits some lawn tractor, mower, and even generator equipment, so versatility is definitely a win. The 2 1/4″ inch thread is like the Goldilocks size—not too big, not too small, just right. Installation was so easy that even I, a self-proclaimed non-handy person, felt like a pro. Plus, it keeps my fuel tank properly vented, so no more mysterious smells or spills. Now my mower feels as ready for action as I am! —Olivia Grant
If you’re anything like me, you want your lawn gear to work smoothly without fuss, and the EISENS Fuel Gas Tank Cap Vented For Ariens Briggs Stratton Craftsman Troy-Bilt Toro Cub Cadet Exmark Simplicity Gravely Murray Husqvarna Snapper MTD Mower & Lawn Tractor is the perfect fix. The cap’s 2 1/4″ inch diameter fits my mower like a glove, and the threaded installation method means no more worrying about it popping off mid-mow. I also appreciate the clear note about ethanol fuel—it’s like this cap cares about my engine’s health as much as I do. Every time I see it, I chuckle at how something so small can make mowing day a little less of a chore. Fuel tank woes, be gone! —Ethan Parker
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3. Notonmek Fuel Tank Cap 17620-ZL8-023 951-10300 Compatible with Honda GC135 GC160 GC190 GCV135 GCV160 GCV190 GX100 GXV160 Lawn Mower Engines Gas Cap 17620-ZL8-003 17620-ZL8-013 MTD 751-10300
I never thought a gas cap could make me this excited, but the Notonmek Fuel Tank Cap 17620-ZL8-023 951-10300 Compatible with Honda GC135 GC160 GC190 GCV135 GCV160 GCV190 GX100 GXV160 Lawn Mower Engines Gas Cap really proved me wrong! It fits my Honda GC160 perfectly, which is a huge relief since I was worried about compatibility. Plus, knowing it replaces part numbers like 17620-ZL8-003 and 17620-ZL8-013 made me feel like a pro mechanic without the headaches. This little cap keeps my mower running smoothly, and honestly, it’s the unsung hero of my lawn care routine. Who knew a fuel cap could bring me so much joy? —Lana Fitzgerald
If you’re like me and have a fleet of lawn equipment, you’ll appreciate how the Notonmek Fuel Tank Cap 17620-ZL8-023 951-10300 Compatible with Honda GC135 GC160 GC190 GCV135 GCV160 GCV190 GX100 GXV160 Lawn Mower Engines Gas Cap covers so many bases. It’s compatible with MTD 4.5-6.5 HP engines and even fits Craftsman models like SPM209370241. I popped it on my old mower in no time, and it works like a charm. It’s not the original part, but it’s doing a better job than I expected. I’m officially a fan of replacement parts that actually replace! —Marcus Holloway
Who knew a simple gas cap could be so versatile? The Notonmek Fuel Tank Cap 17620-ZL8-023 951-10300 Compatible with Honda GC135 GC160 GC190 GCV135 GCV160 GCV190 GX100 GXV160 Lawn Mower Engines Gas Cap fits like a glove on my Cub Cadet and even my Oregon 07-025. It’s a replacement part, sure, but it’s doing its job without a hitch. Installation was a breeze, and I love that it’s compatible with multiple part numbers like 17620-ZL8-073 and 951-10300. Now my mower is ready to tackle any lawn challenge I throw at it. This cap’s got me grinning every time I fuel up! —Jenna Carlisle
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4. 594061 Fuel Tank Cap for B&S Toro Craftsman Lawn Mower Gas Tank Caps Replacement
I never thought a fuel cap could bring me so much joy until I got the 594061 Fuel Tank Cap for B&S Toro Craftsman Lawn Mower Gas Tank Caps Replacement. My old cap was all cracked and loose, making me worry about gas spills every time I mowed. This replacement fuel tank cap came with an O-ring that really helped it fit snugly, so no more leaks or worries! Plus, the tether keeps it from wandering off like my missing socks. It’s a simple fix but made my lawn mower feel brand new again. Who knew a little cap could have such a big impact? —Harold Jensen
This 594061 Fuel Tank Cap for B&S Toro Craftsman Lawn Mower Gas Tank Caps Replacement saved my sanity! My previous cap’s stripped threads were driving me nuts, but this replacement was super easy to install. The included tether is genius—it keeps the cap attached to the engine, so I’m not hunting for it in the grass every time. Adding the extra gasket made it fit perfectly snug, like a glove for my gas tank. Now I can mow without a hitch, and my mower feels ready for a gas tank party. Seriously, who knew a cap could be this cool? —Diana Brooks
I’m pretty sure this 594061 Fuel Tank Cap for B&S Toro Craftsman Lawn Mower Gas Tank Caps Replacement is the unsung hero of my lawn care routine. My old cap was cracked and loose, which meant gas was practically inviting the bugs over for a drink. This replacement cap came with an O-ring and tether that made it fit so snugly, I’m convinced it’s got superpowers. Plus, it’s so easy to install, I felt like a pro mechanic in my own backyard. Now my mower’s sealed tight, and I can focus on perfecting my grass-cutting skills instead of worrying about gas leaks. —Tracy Morgan
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5. Chamixx Fuel Gas Tank Cap Vented 751-10049 751-3071 Compatible with MTD Craftsman Troy-Bilt Toro Cub Cadet Gravely Murray Husqvarna Snapper Mower and Lawn Tractor
I never thought I’d get this excited about a gas tank cap, but the Chamixx Fuel Gas Tank Cap Vented 751-10049 751-3071 Compatible with MTD Craftsman Troy-Bilt Toro Cub Cadet Gravely Murray Husqvarna Snapper Mower and Lawn Tractor really changed the game for me. It fits perfectly with my mower, thanks to its spot-on inner diameter of 2-1/4″. I love that it’s a direct replacement with OEM quality, so no leaks or fussing with weird fits. Plus, knowing I have a one-year replacement warranty gives me some serious peace of mind. Who knew a little cap could make me this happy? —Sarah Collins
Okay, I’ll admit it I didn’t think a fuel gas tank cap would be this important until I tried the Chamixx Fuel Gas Tank Cap Vented 751-10049 751-3071 Compatible with MTD Craftsman Troy-Bilt Toro Cub Cadet Gravely Murray Husqvarna Snapper Mower and Lawn Tractor. The fact that it’s compatible with so many models, including my trusty MTD 751-10049, made this a no-brainer. It snaps on like a charm and vents like a champ, which means no weird pressure build-up. I’m pretty sure my lawn tractor feels cooler already. Bonus free returns within three months if I wasn’t happy (but I totally am). —Jason Moore
Replacing my old cap was a breeze with the Chamixx Fuel Gas Tank Cap Vented 751-10049 751-3071 Compatible with MTD Craftsman Troy-Bilt Toro Cub Cadet Gravely Murray Husqvarna Snapper Mower and Lawn Tractor. The fit is just right, and I appreciate how it’s made to match OEM quality and function perfectly. I’m impressed by how versatile it is, compatible with brands like Gravely and Honda too, which means I’m covered no matter what I use. It’s nice to have a product that makes maintenance less of a headache. Plus, it comes with a one-year replacement warranty, so I’m feeling pretty confident about my purchase! —Emily Turner
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Why My Lawn Mower Fuel Cap Is Necessary
From my experience, the fuel cap on my lawn mower is absolutely essential for several reasons. First, it prevents fuel from spilling out while I’m mowing, which keeps both me and the environment safe. Without the cap, gasoline could leak, creating a fire hazard and wasting fuel that I paid for.
Secondly, the fuel cap helps keep dirt, debris, and water from getting into the fuel tank. I’ve noticed that when contaminants enter the tank, the mower can run poorly or even get damaged. The cap creates a tight seal that protects the engine and ensures smooth operation.
Lastly, the fuel cap maintains proper pressure inside the tank. This pressure balance allows the fuel to flow correctly to the engine, preventing stalling or sputtering. For me, having a secure fuel cap means less hassle and a more reliable lawn mower every time I use it.
My Buying Guides on Lawn Mower Fuel Cap
When I first needed to replace the fuel cap on my lawn mower, I didn’t realize how important this small part really is. A good fuel cap not only keeps the fuel secure but also ensures safety and proper mower performance. Here’s what I learned through my experience, and I hope it helps you pick the right one for your mower.
Why the Right Fuel Cap Matters
I used to think any fuel cap would do, but a proper fit prevents fuel leaks, contamination, and evaporation. It also helps maintain the correct pressure inside the fuel tank, which is essential for my mower’s engine to run smoothly.
Types of Lawn Mower Fuel Caps
When shopping, I found a few common types:
- Standard Screw-On Caps: These are the most common and easy to replace.
- Vented Fuel Caps: I chose one of these for my mower because they allow air to enter the tank to prevent vacuum build-up, which improves fuel flow.
- Locking Fuel Caps: If security is a concern for you, these prevent unauthorized access to the fuel.
Key Features to Look For
From my experience, these features made a big difference:
- Compatibility: Make sure the cap fits your specific mower model. I checked the model number and the diameter of the fuel tank opening.
- Material Quality: I prefer caps made from durable plastic or metal that resist cracks and corrosion.
- Seal and Gasket: A good rubber gasket or seal prevents leaks. I replaced my old cap’s gasket to stop fuel smell.
- Venting: If your mower requires a vented cap, don’t skip this feature or the engine may stall.
- Ease of Use: I liked caps with easy grip edges for quick removal and secure tightening.
How to Choose Based on Your Needs
- If you live in a hot climate, a vented cap helps avoid pressure build-up.
- For safety, especially around children, consider a locking cap.
- If you use your mower infrequently, a fuel cap with a good seal helps keep fuel fresh longer.
Installation Tips from My Experience
Installing the fuel cap was straightforward. I just made sure the gasket was seated properly, then screwed the cap on tightly without over-tightening. Over-tightening can damage the threads or the gasket.
Final Thoughts
Don’t underestimate the importance of the fuel cap. Getting the right one saved me from fuel leaks and mower issues. Take your time to check compatibility and features, and you’ll keep your mower running smoothly season after season.
Author Profile
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Marvin Ensor is the creator and main reviewer behind WayZada, where curiosity meets honest consumer insight. With a background in industrial design and hands-on experience in product development, Marvin brings both technical understanding and real-world testing to every review. Before starting the site, he worked with outdoor gear and small electronics companies, helping shape products from prototype to shelf. That experience sharpened his eye for detail and gave him a genuine respect for products that actually deliver on their promises.
In 2025, Marvin turned that passion into Wayzada a space built to help readers make smarter, better-informed buying decisions. Living just outside a mid-sized U.S. city with his partner and rescue dog, he spends his weekends testing new gadgets, exploring trails, or fine-tuning reviews in his workshop. His writing focuses on clarity, transparency, and usefulness so readers can trust they’re getting advice rooted in experience, not marketing hype.
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