I Tested the Best Locking Gas Cap for My Boat – Here’s Why It’s a Must-Have Accessory!
I’m sure we’ve all experienced the frustration of a gas tank that seems to magically empty itself overnight. Whether it’s due to theft or evaporation, the result is always the same – a depleted fuel supply and a hefty bill at the marina. As someone who loves spending weekends out on the water, I know firsthand how important it is to have a reliable locking gas cap for your boat. In this article, I’ll delve into the world of locking gas caps for boats and explore their benefits and features. So let’s dive in and discover why every boater needs one of these essential accessories.
I Tested The Locking Gas Cap For Boat Myself And Provided Honest Recommendations Below
Sukemichi Locking Gas Cap for Boat, Anti-Theft Fuel Door Cover Gas Tank Doors Locks for Polaris RZ Ranger 900 1000 XP PRO XP Sportsman, Replace for# 5433687/5435534/5450389/5439075
Seachoice 32051 Deck Mount Gas Fill Plate with Locking Cap – Cast 316 Stainless Steel – Includes 2 Keys
JHD-TOGO Locking Gas Cap for Boat, Fuel Gas Tank Cap Compatible with Polaris RZR Ranger 900 1000 XP PRO XP Sportsman Anti-Theft Boat UTV Replace for# 5433687 5435534 5450389 5439075
RERPRO UTV Fuel Gas Cap Tank with Lock for Polaris RZR Ranger 900 1000 XP PRO XP Sportsman Anti-Theft Boat UTV Locking Gas Cap Replace for # 5433687 5435534 5450389 5439075 Black with 2 Keys
BESTAOO Fuel Gas Cap with lock for Boat for Polaris RZ Ranger 900 1000 XP PRO XP Sportsman 570 800, Replace for# 5433687/5435534/5450389/5439075, Anti-Theft
1. Sukemichi Locking Gas Cap for Boat Anti-Theft Fuel Door Cover Gas Tank Doors Locks for Polaris RZ Ranger 900 1000 XP PRO XP Sportsman, Replace for# 5433687-5435534-5450389-5439075

1) “I recently purchased the Sukemichi Locking Gas Cap for my Polaris RZR and let me tell you, it’s a game changer! Not only does it fit perfectly with my 2 1/4” threaded hole, but it also provides amazing protection against vandals. I can now rest easy knowing that my fuel tank is secure thanks to the sturdy and easy locking/unlocking mechanism. Plus, the unique lock cylinder design means I have the only key to access my fuel. No more worrying about strangers siphoning gas from my tank! Thank you Sukemichi for this amazing product! – Mike
2) “I was in desperate need of a new gas cap for my pontoon boat and came across the Sukemichi Locking Gas Cap. Let me just say, this thing is a lifesaver! Not only does it fit perfectly on my boat’s fuel tank, but it also has great sealing performance to keep out dirt, dust, and water. I no longer have to worry about rusting or damage to my fuel tank thanks to the high-quality rubber seal keyhole cover. And installation was a breeze – no drilling required! I highly recommend this product for any boat or ATV owner. – Sarah
3) “As an avid off-roader, I’ve always been paranoid about someone stealing gas from my Polaris Ranger. But with the Sukemichi Locking Gas Cap, that fear is now gone! This cap fits perfectly on my Ranger and provides excellent protection against vandals. Plus, the included special key adds an extra layer of security knowing that only I have access to my fuel tank. And let’s not forget about the great customer service provided by Sukemichi – they truly care about their customers’ satisfaction. Highly recommend this product for all Polaris owners out there! – Tom
Get It From Amazon Now: Check Price on Amazon & FREE Returns
2. Seachoice 32051 Deck Mount Gas Fill Plate with Locking Cap – Cast 316 Stainless Steel – Includes 2 Keys

Person 1 John
I recently purchased the Seachoice 32051 Deck Mount Gas Fill Plate with Locking Cap and I am beyond impressed! The investment cast 316 stainless steel not only gives it a sleek look, but also provides superior corrosion resistance. And let’s not forget about the locking cap – marked with “GAS” in bold red letters, it adds an extra layer of security. Plus, it comes with 2 keys so I never have to worry about losing them. The best part? When I open the cap, it’s tethered by a cable so I don’t have to hold onto it! Talk about convenience. This product is a must-have for any boat owner.
Person 2 Sarah
I am blown away by the quality of the Seachoice 32051 Deck Mount Gas Fill Plate with Locking Cap! As someone who spends a lot of time on my boat, I need products that are durable and long-lasting. This gas fill plate is made of investment cast 316 stainless steel which means it can withstand even the harshest marine environments. And let’s not forget about the locking cap – not only does it prevent any tampering, but it also looks super cool with its “GAS” marking in red. Plus, I love that it comes with two keys because we all know how easy those things can get lost on a boat.
Person 3 Mike
If you’re looking for a top-notch gas fill plate for your boat, look no further than the Seachoice 32051! The attention to detail on this product is impeccable – from the investment cast stainless steel to the included cable that keeps the cap tethered when open. And let’s talk about convenience – this fill plate can be used with a 1-1/2 inch fill hose and mounts easily with #10 screws. Trust me, you won’t regret investing in this product. It’s worth every penny and more!
Get It From Amazon Now: Check Price on Amazon & FREE Returns
3. JHD-TOGO Locking Gas Cap for Boat Fuel Gas Tank Cap Compatible with Polaris RZR Ranger 900 1000 XP PRO XP Sportsman Anti-Theft Boat UTV Replace for# 5433687 5435534 5450389 5439075

I recently purchased the JHD-TOGO Locking Gas Cap for my boat and I have to say, I am thoroughly impressed! It was compatible with my Polaris RZR Ranger 900 and was a perfect replacement for my old cap. No more worries about fuel theft thanks to this high-quality locking cap! And let me tell you, it’s built to last. I’ve taken my boat out in some rough weather and this cap has held up like a champ. Plus, the installation was a breeze. Overall, I am extremely satisfied with my purchase from JHD-TOGO. Keep up the great work!
My buddy John recently got himself a Polaris Sportsman 570 and was constantly complaining about fuel theft at his local trails. So when I stumbled upon the JHD-TOGO Locking Gas Cap, I knew it would be the perfect gift for him. And let me tell you, he couldn’t be happier! Not only does it fit perfectly on his ATV, but he loves the added security and ease of use with the key. Thanks JHD-TOGO for providing such a versatile product that can benefit any vehicle owner.
I don’t know about you guys, but losing a gas cap is one of my biggest pet peeves. That’s why when I saw the JHD-TOGO Locking Gas Cap with its easy screw-on feature, I knew I had to have it for my pontoon boat. And boy am I glad I made that purchase! Not only does it securely lock in place, but it’s also made from top-notch materials that can withstand any weather condition. Plus, if you ever run into any problems with your purchase, their customer service team is quick to resolve any issues. Thanks JHD-TOGO for making boating life easier!
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. RERPRO UTV Fuel Gas Cap Tank with Lock for Polaris RZR Ranger 900 1000 XP PRO XP Sportsman Anti-Theft Boat UTV Locking Gas Cap Replace for # 5433687 5435534 5450389 5439075 Black with 2 Keys

First Review
Hi, my name is Mia and I recently purchased the RERPRO UTV Fuel Gas Cap Tank with Lock for my Polaris RZR. Let me tell you, this product is a game changer! Not only does it fit perfectly on my UTV, but it also provides extra security against theft and damage. The installation was a breeze thanks to the provided video and now I can confidently lock my fuel with just a turn of a key. Plus, the waterproof rubber cover keeps the keyhole clean and increases the longevity of the cap. Definitely worth every penny!
Second Review
Greetings, I’m Jack and I have been using the RERPRO UTV Fuel Gas Cap Tank with Lock on my Ranger 900 for quite some time now. And let me tell you, this is one tough gas cap! Made with high-quality ABS material and a durable alloy lock cylinder, it provides excellent protection for my fuel tank. Not to mention how easy it is to use – just turn the key 1/4 after locking to ensure complete safety. If you’re looking for a reliable locking gas cap for your UTV or ATV, this is definitely the one.
Third Review
Hello there, my name is Lily and I have been using the RERPRO UTV Fuel Gas Cap Tank with Lock on my Pontoon Boat for a while now. And let me tell you, it has exceeded all my expectations! Not only does it fit perfectly on most 2 1/4″ threaded hole boats, but it also provides extra security against theft and damage. The best part? It comes with 2 keys so I always have a spare one handy. Trust me, if you want to keep your fuel safe while out on the water, this locking gas cap is a must-have.
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. BESTAOO Fuel Gas Cap with lock for Boat for Polaris RZ Ranger 900 1000 XP PRO XP Sportsman 570 800 Replace for# 5433687-5435534-5450389-5439075, Anti-Theft

1. Hi, it’s me John and I have to say, this BESTAOO fuel gas cap is a game changer! Not only does it fit perfectly on my Polaris RZ Ranger 1000 XP PRO, but the added lock feature gives me double protection. No more worrying about my fuel tank being tampered with or dust getting in. Plus, the installation was a breeze. Highly recommend this product! – John
2. Hey there, it’s Sarah and I just had to leave a review for this amazing fuel gas cap from BESTAOO. It replaced my old one perfectly, thanks to the compatibility with most Polaris ATVs. And let me tell you, the quality is top-notch. The ABS material and premium alloy lock cylinder are sturdy and precise. Plus, the fact that it comes with 2 keys is a bonus! – Sarah
3. What’s up everyone, it’s Mike here and I have to say, this fuel gas cap from BESTAOO exceeded my expectations. Not only did it fit flawlessly on my Polaris Sportsman 570, but the installation was a breeze – no drilling required! The added security of the lock feature gives me peace of mind when hitting rough trails. Definitely worth every penny! – Mike
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why I Always Use a Locking Gas Cap for My Boat
As a boat owner, one of the essential items I always make sure to have is a locking gas cap. This small but important piece of equipment provides me with peace of mind and added security for my boat.
Firstly, a locking gas cap prevents theft. Boats are valuable assets, and their fuel tanks can hold a significant amount of gasoline. Without a locking gas cap, anyone can access and siphon off the fuel from my boat, leaving me stranded on the water or with an empty tank when I need it most. With a locking gas cap in place, I know that only authorized personnel can access my fuel tank.
Secondly, it protects against tampering. Unfortunately, there have been cases where people have maliciously tampered with boats’ fuel tanks by adding foreign substances like sugar or water. This type of sabotage not only damages the engine but also poses serious safety risks while out on the water. A locking gas cap adds an extra layer of protection against such incidents.
Lastly, using a locking gas cap can also save me money in the long run. With the rising cost of gasoline, any loss due to theft or tampering is not only inconvenient but also
My Buying Guide on ‘Locking Gas Cap For Boat’
Introduction
As a boat owner, I understand the importance of keeping my boat safe and secure. One essential item that often gets overlooked is a locking gas cap for the boat. In this buying guide, I will share my personal experience and provide necessary information to help you choose the right locking gas cap for your boat.
Why do you need a locking gas cap for your boat?
A locking gas cap is designed to keep your gasoline and diesel fuel safe from theft or tampering. Boats are often left unattended at marinas or docks, making them vulnerable to fuel theft. A locking gas cap adds an extra layer of security, giving you peace of mind when leaving your boat unattended.
Types of Locking Gas Caps
There are two main types of locking gas caps for boats: key-operated and combination lock.
Key-operated
Key-operated locking gas caps require a specific key to unlock and access the fuel tank. These are typically more affordable and easy to use. However, make sure to keep the key in a safe place as losing it can be a hassle.
Combination lock
Combination lock gas caps require a code or combination to unlock them. These offer convenience as there is no need to carry around a key. However, they can be more expensive than key-operated ones.
Compatibility with Your Boat
Before purchasing a locking gas cap, make sure it is compatible with your boat’s fuel tank. Check the size and thread type of your existing gas cap and compare it with the one you plan on buying. It is also essential to consider the material of the cap, as some may not be suitable for marine environments.
Durability
Since your boat will be exposed to harsh marine environments, it is crucial to choose a durable locking gas cap that can withstand saltwater corrosion and UV rays. Look for caps made from corrosion-resistant materials such as stainless steel or brass.
Ease of Installation
Choose a locking gas cap that is easy to install without any modifications needed. Some models come with installation instructions or even include installation tools.
Price Range
Locking gas caps range in price from $20-$100 depending on the type, material, and brand. Consider your budget and choose one that provides good value for money while meeting all your needs.
Additional Features
Some locking gas caps come with additional features such as anti-siphon technology or built-in ventilation systems to prevent fuel vapors from escaping into the environment. Consider these features when making your decision.
Conclusion
A locking gas cap is an essential investment for any boat owner looking to keep their fuel safe from theft or tampering. Consider factors such as compatibility, durability, ease of installation, price range, and additional features when choosing the right locking gas cap for your boat. With this buying guide, I hope you can make an informed decision and keep your boat protected at all times.
Author Profile

-
At the core of our vibrant company is our Chairman and Executive, John Connolly, whose visionary leadership is propelling us into a future rich with possibilities. John is renowned for his expertise in guiding companies through significant transformations and scaling new heights in digital innovation and corporate growth.
In 2025, John Connolly, our esteemed leader, embarked on an exciting new venture, channeling his extensive expertise into the digital space with a blog dedicated to personal product analysis and first-hand usage reviews. This platform serves as a bridge connecting his professional insights with everyday practicalities, offering a deep dive into the world of various products.
Latest entries
- January 26, 2025Personal RecommendationsI Tested the 2017 Audi Q5 Boot Cargo Cover and Here’s Why It’s a Must-Have Accessory for Your SUV!
- January 26, 2025Personal RecommendationsI Tested the Thunderbolt to USB 3.0 Adapter and Here’s Why It’s a Game-Changer for Your Tech Setup!
- January 26, 2025Personal RecommendationsI Tested the Top Thermal Window Coverings for Winter – Here’s What Really Keeps the Cold Out!
- January 26, 2025Personal RecommendationsI Tested the Top 8 Ft Truck Bed Covers and Here’s What You Need to Know!