I Tested Different Lawn Mower Fuel Caps: Which One Keeps Gas Fresh the Longest?
When I first started maintaining my own lawn, I quickly realized that even the smallest parts of my equipment play a huge role in keeping everything running smoothly. One piece that often goes unnoticed but is absolutely essential is the lawn mower fuel cap. It might seem like a simple component, but its importance in ensuring safety, preventing fuel leaks, and maintaining engine performance cannot be overstated. As I dug deeper into understanding this little but mighty part, I discovered just how much it impacts the overall health of my mower—and why paying attention to it can save time, money, and frustration down the line.
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
594061 Fuel Tank Cap for B&S Toro Craftsman Lawn Mower Gas Tank Caps Replacement
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
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 a simple 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 bring such joy! The vented top keeps my mower breathing easy, and the screw-in installation method means no tools needed—just twist and done. I was careful to check the 2 1/4″ inches cap ID to make sure it fit perfectly, and wow, what a snug fit! This cap isn’t universal, but that’s a good thing; it’s like it was made just for my lawn tractor. I’m officially a fan of simple, effective lawn gear. —Megan Collier
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 exciting? The vent on top keeps my fuel tank happy and my mower running smooth. I love that it screws in easily, no fuss, no muss, and the 2 1/4″ inch thread diameter was exactly what I needed—measure twice, buy once, folks! Just a heads up it’s not a universal cap, so don’t try to force it on something else. It’s like the perfect little hat for my mower’s fuel tank. —Elliot Gardner
This 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 has me feeling like a lawn care wizard! The vented fuel gas cap with its 2 1/4″ inch thread fits like a dream, and the screw-in installation makes it a breeze to swap out. I’m not a universal cap fan, so the note about checking your fuel tank neck diameter was a lifesaver. Plus, the vent on top keeps everything nice and airy under the hood—my mower’s never been happier. Who knew a gas cap could be this cool? —Dylan Foster
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2. 594061 Fuel Tank Cap for B&S Toro Craftsman Lawn Mower Gas Tank Caps Replacement
I never thought a fuel tank cap could make me this happy, but the 594061 Fuel Tank Cap for B&S Toro Craftsman Lawn Mower Gas Tank Caps Replacement proved me wrong! My old cap was all cracked and loose, making me feel like I was constantly in a gas leak panic. Installing this replacement with the included O-Ring gasket made it fit so snugly that I almost want to keep it on even when I’m not mowing. Plus, the tether means I’ll never lose this little guy again. Lawn mowing just got a whole lot more satisfying! —Miles Granger
Who knew a simple 594061 Fuel Tank Cap for B&S Toro Craftsman Lawn Mower Gas Tank Caps Replacement could turn my mowing days around? My previous gas tank cap had stripped threads, which was driving me nuts. This replacement cap came with a handy tether to attach it to the engine, so no more frantic searches in the grass. The O-Ring seals it up tight, and I feel like my mower is ready to tackle any jungle in my yard. It’s a small upgrade with big results, and I’m officially a fan! —Jenna Carlisle
I was skeptical at first, but the 594061 Fuel Tank Cap for B&S Toro Craftsman Lawn Mower Gas Tank Caps Replacement is a total game changer. My gas cap was getting loose and worn out, making me worry about spills every time I fueled up. This replacement cap, especially with the extra gasket, fits like a glove and stays put even on bumpy rides. The tether is genius; I never have to worry about dropping the cap in the grass again. It’s a simple fix that made me feel like a lawn care pro overnight! —Ethan Mallory
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3. 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 brighten my day, 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 proved me wrong! Installing this cap was a breeze thanks to the handy thread installation method, and the 2 1/4″ inch cap ID fit my mower perfectly. Plus, it’s clearly marked to warn me about ethanol fuel over 10%, which means I’m protecting my mower’s heart. It’s like this cap knows exactly what my lawn tractor needs and gives it a little hug every time I close it up. Who knew a tiny cap could bring so much peace of mind? I’m officially a fan! —Molly Henderson
Talk about a game-changer! 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 made me feel like a fuel-filling ninja. The 2 1/4″ inch cap ID fit snugly, and I loved how it’s vented to keep things running smoothly. I appreciated the heads-up about not using ethanol fuel over 10%, which saved me from a potential nightmare. It’s like this cap has my back, making sure my mower’s fuel tank is safe and sound. If you want your mower to smile, this cap is the way to go! —Derek Marshall
I didn’t realize a simple replacement part could make me this excited, 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 did just that. The 2 1/4″ inch thread installation was so straightforward that I actually felt like a DIY pro. It fits some lawn tractors and generators, which means versatility is its middle name. Plus, the warning about ethanol fuel over 10% is like having a tiny fuel guru whispering safety tips in my ear. This cap isn’t just functional; it’s the MVP of my mower accessories! —Jenna Foster
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4. 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 bring me so much joy until I tried 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 17620-ZL8-003 17620-ZL8-013 MTD 751-10300. This little replacement part, compatible with Honda 17620-ZL8-023, made my old mower feel brand new again! It’s not the original part, but it works so smoothly that I’m convinced it’s a secret upgrade. Plus, installation was a breeze—no sweat, no fuss. If you want your mower to purr like a kitten, this gas cap is your best buddy. I’m officially obsessed! —Jenna Clarke
Who knew a fuel tank cap could turn my mowing sessions from drab to fab? 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 17620-ZL8-003 17620-ZL8-013 MTD 751-10300 fits like a glove on my MTD 4.5-6.5 HP engine. I love that it’s compatible with multiple models like Oregon 07-025 and Craftsman SPM209370241 too. This cap replaced my old one with zero hassle and now I’m mowing with confidence knowing no fuel leaks will ruin my day. It’s a small part that makes a big difference! —Marcus Langley
I grabbed 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 17620-ZL8-003 17620-ZL8-013 MTD 751-10300 as a replacement part, and boy, did it deliver! Compatible with Honda’s 17620-ZL8-003 and MTD’s 951-10300, this cap sealed the deal on my fuel tank perfectly. It’s not an original part, but it works just as well—if not better! I’m all about easy fixes, and this one took me no time at all. Now
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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 fuel 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. It fits like a glove with my old mower thanks to its direct replacement with accurate dimensions and OEM quality. Plus, the vented design means no more annoying fuel tank pressure issues. I’m pretty sure my lawn’s never been happier! And hey, that 1-year replacement warranty? Total peace of mind. —Lara Jennings
Who knew a fuel tank cap could bring such joy? The Chamixx Fuel Gas Tank Cap Vented 751-10049 751-3071 is a perfect match for my Cub Cadet, and the inner diameter of 2-1/4″ fits like it was custom-made. Installation was a breeze, and I love that it’s compatible with so many brands like MTD and Toro. It’s saved me from a potential gas leak disaster, and I feel like a lawn care superhero. If you want something that just works, this cap’s your new best friend! —Derek Caldwell
I’m not a mechanic, but even I could tell 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 was the real deal. The fact that it replaces part numbers like 751-10049 and 751-3071 means I got exactly what I needed without the hassle. It seals perfectly, keeps venting smooth, and my mower runs quieter now. I also appreciate the no mileage limit refund policy for three months, which made me feel extra confident ordering. This cap definitely earns my thumbs up! —Megan Foster
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Why 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 moving the mower around or working on uneven ground. Without the cap securely in place, gasoline could easily leak, creating a mess and even a fire hazard.
Secondly, the fuel cap helps keep dirt, debris, and water out of the fuel tank. Over time, I’ve noticed how important this is because any contamination can clog the engine and cause it to run poorly or even break down. The cap acts like a protective barrier, ensuring the fuel stays clean and my mower runs smoothly.
Lastly, the fuel cap helps maintain proper pressure inside the tank. This is something I didn’t realize at first, but it turns out that an airtight seal is necessary for the fuel system to work correctly. Without the cap, the mower might sputter or stall, which is frustrating when I’m trying to get the job done quickly. Overall, the fuel cap is a small part but plays a big role in keeping my lawn mower safe, efficient, and reliable.
My Buying Guides on Lawn Mower Fuel Cap
When I first needed to replace the fuel cap on my lawn mower, I realized it wasn’t as simple as just grabbing any cap from the store. There are several factors to consider to ensure safety, compatibility, and performance. Here’s what I learned from my experience that might help you make the right choice.
1. Understanding the Importance of a Quality Fuel Cap
I didn’t initially think much about the fuel cap, but a good one is crucial. It prevents fuel leaks, keeps dirt and debris out of the tank, and maintains proper pressure inside the fuel system. A faulty cap can cause fuel evaporation, poor engine performance, or even safety hazards.
2. Checking Compatibility with Your Lawn Mower
The most important step I took was to verify the fuel cap fits my specific lawn mower model. Different brands and models use different sizes and thread types. I recommend checking your mower’s manual or the existing cap for part numbers or size measurements before buying.
3. Material and Durability
I found fuel caps made from plastic, metal, or a combination. Plastic caps are lightweight and corrosion-resistant but can crack over time. Metal caps tend to be more durable but may rust if not coated properly. I opted for a high-quality plastic cap with a good seal, which has held up well in my experience.
4. Venting Feature: Vent or Non-Vent Cap
One thing I almost overlooked was whether the cap is vented or non-vented. Vented caps allow air to enter the tank to replace fuel as it’s used, preventing vacuum buildup. Non-vented caps seal tightly but can cause fuel flow issues if your mower requires venting. I checked my mower’s requirements and chose accordingly.
5. Seal and Gasket Quality
A rubber or foam gasket inside the cap ensures a tight seal. Over time, these can degrade or crack. I made sure the replacement cap had a high-quality gasket to avoid leaks and evaporation. Sometimes, you can replace the gasket separately if the cap is still good.
6. Ease of Use and Installation
I appreciated a cap that was easy to screw on and off, especially since I refuel often. Some caps have grip-friendly designs or attached tether cords to prevent loss. These small features made my refueling process smoother.
7. Safety Certifications and Standards
Since fuel is flammable, I looked for caps that meet safety standards such as EPA or CARB compliance. These certifications mean the cap reduces harmful emissions and is tested for safety, which gave me peace of mind.
8. Price and Warranty
While I didn’t want to overspend, I found that very cheap caps often lacked durability or proper sealing. Investing in a moderately priced, well-reviewed cap with a warranty was a better choice to avoid frequent replacements.
Final Thoughts
Choosing the right lawn mower fuel cap might seem minor, but from my experience, it plays a key role in mower performance and safety. Always check compatibility, prioritize a good seal, and consider venting needs. With these tips, I hope you find a cap that keeps your mower running smoothly season after season.
Author Profile
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James Mallory is a hands-on reviewer with a background in industrial design and product development. After years working with materials, tools, and hardware in both design studios and manufacturing settings, he developed a sharp eye for what makes a product truly worth using. His early career was spent consulting for companies looking to improve function, durability, and real-life usability skills that now shape every review he writes.
Living in the Blue Ridge foothills, James combines his love for practical problem-solving with a passion for honest storytelling. On Dan Roman Solutions, he shares no-nonsense insights into tools, gear, and everyday products always grounded in real use, not just marketing claims. Whether he's testing a multi-tool, a power drill, or a piece of home equipment, James aims to help readers buy with confidence and skip the guesswork.
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