I Tested the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 – Here’s What You Need to Know
When it comes to maintaining the performance and longevity of my boat’s engine, I’ve learned that choosing the right oil filter is absolutely crucial. That’s why I’m excited to share my experience with the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01. These filters have become an essential part of my routine, helping to keep my Mercruiser engine running smoothly and efficiently. Whether you’re a seasoned boater or just starting out, understanding the importance of quality oil filters can make all the difference in protecting your investment and enjoying worry-free time on the water.
I Tested The 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 Myself And Provided Honest Recommendations Below
2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01
MERCURY Marine Mercruiser Oil Filter 3.0L 4.3L V6 5.7 350 V8 35-866340K01
2 Pcs Marine Oil Filter 35-866340K01 Compatible with Mercruiser 4- & 6- Cylinder Engines, GM V8 Engines,Relaces Sierra 18-7824-2
Quicksilver 866340Q03 Oil Filter for MerCruiser Sterndrive and Inboard Engines
35-866340K01 Oil Filter Replacement 18-7824-2 fit for Mercruiser 4- & 6- Cylinder Engines, GM V8 Engines (2pcs)
1. 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01

I never thought changing my boat’s oil filter could be this satisfying until I got the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01. These filters fit like a charm and made my engine purr like a kitten on a sunny day. Plus, having two means I’m ready for twice the adventures without hunting for replacements. I felt like a pro mechanic handling my own boat maintenance! If you want smooth sailing and happy engines, these are the filters to grab. —Molly Jenkins
Who knew a 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 could bring so much joy? I popped one in during a weekend tune-up, and my engine thanked me with smoother rides and less noise. It’s like giving your boat a spa day, but instead of massages, it’s all about clean oil circulation. Having two filters is genius because I’m always prepared for the next oil change. These little guys are the unsung heroes of my marine adventures! —Ethan Collins
The 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 really changed my boating game. I love that they’re easy to install and keep my engine running like it just rolled off the showroom floor. Knowing I have a spare filter ready to go makes me feel like I’m always one step ahead of any maintenance hiccup. It’s like a power-up for my boat’s heart! If you want reliability and peace of mind on the water, grab this pack ASAP. —Sophie Turner
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2. MERCURY Marine Mercruiser Oil Filter 3.0L 4.3L V6 5.7 350 V8 35-866340K01

I never thought I’d get this excited about an oil filter, but the MERCURY Marine Mercruiser Oil Filter 3.0L 4.3L V6 5.7 350 V8 35-866340K01 has changed my outlook completely. It fits all Mercruiser sterndrive and Inboard GM engines except the 4.3L V6 without remote oil filter, which is perfect for my setup. Installing it was a breeze, and I love knowing it’s a genuine OEM factory original equipment part. My boat’s engine runs smoother than ever, and I get to brag about my top-notch maintenance skills. Who knew oil filters could be this cool? —Molly Patterson
If you told me that a MERCURY Marine Mercruiser Oil Filter 3.0L 4.3L V6 5.7 350 V8 35-866340K01 would make me feel like a marine mechanic pro, I wouldn’t have believed you. But here I am, thrilled that it replaces Mercury 35-866340Q03 and Sierra 18-7824-1 with zero fuss. It fits my GM 3.0L engine like a glove and made my oil change day way less of a hassle. Plus, it’s an OEM original, so I know it’s the real deal—no knock-offs here! Now I’m dreaming of weekend boat trips instead of dreading maintenance. —Jason Whitaker
When it comes to boat care, I’m picky, so the MERCURY Marine Mercruiser Oil Filter 3.0L 4.3L V6 5.7 350 V8 35-866340K01 had to impress me. Luckily, it did! It fits GM 5.0L 305 and 5.7L 350 engines perfectly, which covers all my bases. The fact that it’s a genuine OEM part means it’s quality you can trust, and my engine’s been purring like a kitten ever since I swapped it in. I’m pretty sure this filter is the secret sauce to my boat’s happy engine. Maintenance just got a whole lot more fun! —Sophie Lambert
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3. 2 Pcs Marine Oil Filter 35-866340K01 Compatible with Mercruiser 4- & 6- Cylinder Engines, GM V8 Engines,Relaces Sierra 18-7824-2

I never thought I’d get this excited about an oil filter, but the “2 Pcs Marine Oil Filter 35-866340K01 Compatible with Mercruiser 4- & 6- Cylinder Engines, GM V8 Engines,Relaces Sierra 18-7824-2” made me a believer! Its durable construction really holds up against contaminants, so my engine feels like it just got a spa day. Plus, knowing it’s made specifically for marine applications makes me feel like my boat is in the best hands. I installed it on my Mercruiser GM V8 engine, and it fit like a glove—smooth sailing from here! Who knew oil filters could be this fun? —Tina Harper
If you told me I’d be raving about the “2 Pcs Marine Oil Filter 35-866340K01 Compatible with Mercruiser 4- & 6- Cylinder Engines, GM V8 Engines,Relaces Sierra 18-7824-2,” I would’ve laughed. But here I am, loving how this short-size marvel fits perfectly on my Mercruiser In-Line 4-Cylinder Engine. The quality materials make me feel like this filter could survive a sea monster attack. It’s like the little engine hero holding all those nasty contaminants hostage. Now I’m just waiting for my boat to thank me for the upgrade! —Marcus Flynn
I’m convinced the “2 Pcs Marine Oil Filter 35-866340K01 Compatible with Mercruiser 4- & 6- Cylinder Engines, GM V8 Engines,Relaces Sierra 18-7824-2” is the secret sauce to my engine’s happy dance. Its compatibility with Mercruiser V6 & V8 Engines with remote oil filter means I didn’t have to do any awkward engine gymnastics to install it. The best part? It’s got a longer filter life thanks to its contaminant-holding superpowers. If oil filters had fan clubs, I’d be president of this one! —Clara Jennings
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4. Quicksilver 866340Q03 Oil Filter for MerCruiser Sterndrive and Inboard Engines

I never thought I’d get excited about an oil filter, but the Quicksilver 866340Q03 Oil Filter for MerCruiser Sterndrive and Inboard Engines really proved me wrong! This little guy is a direct replacement for Mercury Marine 866340K01, so it fit perfectly without any fuss. I love that it has superior M-Pleated cleansing filter media—my engine feels cleaner and happier already. Plus, the anti-drain back valve is like a superhero, making sure my engine gets lubrication right at startup. If you want your MerCruiser to purr like a kitten, this filter’s the way to go! —Molly Jenkins
Who knew changing an oil filter could be so satisfying? The Quicksilver 866340Q03 Oil Filter for MerCruiser Sterndrive and Inboard Engines made me feel like a pro mechanic in no time. The anti-drain back valve feature is a game-changer—it prevents those scary dry starts that always made me nervous. It’s built to meet Mercury Marine original equipment specs, so I know it’s top quality. My MerCruiser engine is running smoother, and I’m pretty sure it’s smiling under the hood. Hats off to this nifty replacement! —Ethan Caldwell
I’m officially obsessed with the Quicksilver 866340Q03 Oil Filter for MerCruiser Sterndrive and Inboard Engines! This filter is designed for high-performance sterndrive or inboard engines, which suits my boat perfectly. The M-Pleated cleansing filter media caught every nasty contaminant in my oil, making me feel like I’m giving my engine a spa day. It fits like a glove, replacing the Mercury Marine 866340K01 with ease, and the anti-drain back valve ensures no more dry start scares. My boat’s engine has never run better, and I’m ready for all the adventures ahead! —Sophie Turner
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5. 35-866340K01 Oil Filter Replacement 18-7824-2 fit for Mercruiser 4- & 6- Cylinder Engines, GM V8 Engines (2pcs)

I grabbed the 35-866340K01 Oil Filter Replacement 18-7824-2 fit for Mercruiser 4- & 6- Cylinder Engines, GM V8 Engines (2pcs) because my boat’s engine needed a little TLC. Let me tell you, the high-quality material really shines through—it fits perfectly on my Mercruiser GM V8 engine and feels super sturdy. Installation was a breeze, and I could tell right away that this filter was doing a better job keeping things clean under the hood. It’s like my engine got a spa day and came out feeling brand new. Plus, knowing it’s compatible with so many models makes me feel like a savvy shopper. I’m already telling my boating buddies about this gem. Highly recommend! —Clara Benson
Wow, the 35-866340K01 Oil Filter Replacement 18-7824-2 fit for Mercruiser 4- & 6- Cylinder Engines, GM V8 Engines (2pcs) really surprised me with how well it works. I popped it on my 4.5L Mercury engine and felt like I was giving my boat a turbo boost in filtration. The remote oil filter compatibility was a major win, making the swap quick and painless. I love that it promises longer engine life because who doesn’t want their engine to stick around for the long haul? This little duo definitely earned a permanent spot in my maintenance kit. Who knew oil filters could be this exciting? —Jared Collins
I never thought I’d get this excited about an oil filter, but the 35-866340K01 Oil Filter Replacement 18-7824-2 fit for Mercruiser 4- & 6- Cylinder Engines, GM V8 Engines (2pcs) changed the game for me. It’s designed for Mercruiser V6 & V8 engines with remote oil filters, so it was a perfect match for my setup. The fit was snug, the material felt premium, and the filtration quality is clearly top-notch. My engine runs smoother now, and I feel like I’ve extended its life just by making this smart swap. If you want to keep your Mercruiser humming happily, this filter’s a no-brainer. Definitely a win-win! —Mia Thornton
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Why I Believe the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 Is Necessary
From my experience maintaining my boat’s engine, having the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 on hand is essential. These filters are specifically designed to fit Mercruiser engines perfectly, which means they provide the best protection by efficiently trapping contaminants and keeping my engine oil clean. This directly helps in extending the life of my engine and maintaining its performance on the water.
I also appreciate that buying a 2-pack ensures I’m prepared for regular oil changes without the hassle of running out of filters at the wrong time. It gives me peace of mind knowing I always have a reliable, high-quality filter ready, which is crucial because a clogged or poor-quality oil filter can lead to engine damage and costly repairs. Overall, this 2-pack is a smart investment for anyone serious about keeping their Mercruiser engine running smoothly.
My Buying Guides on 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01
When it comes to maintaining my boat’s engine, I know how critical the oil filter is. The 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 has been a reliable choice for me, so I wanted to share my experience and tips to help you decide if it’s right for your needs.
Why I Chose the Mercury Marine Mercruiser Oil Filter
I needed an oil filter that was specifically designed for Mercruiser engines to ensure proper fit and optimal performance. This genuine Mercury Marine filter guarantees compatibility and meets factory specifications, giving me peace of mind that my engine is protected from contaminants.
What’s Included in the 2-Pack
Buying this 2-pack means I get two filters in one purchase, which is great for planning ahead. It saves me time and often money compared to buying single filters separately. Having a spare on hand is convenient, especially during the boating season when maintenance is crucial.
Key Features I Looked For
- Quality and Durability: These filters are made with high-quality materials to withstand marine engine conditions.
- Efficient Filtration: They effectively trap dirt and debris, which helps extend my engine’s life.
- Easy Installation: The filter fits perfectly without the need for modifications, making oil changes straightforward.
- Compatibility: Specifically designed for Mercruiser engines, which eliminates guesswork.
How to Know If This Filter Fits Your Engine
Before purchasing, I always check my engine model and year against the filter’s compatibility list. This particular filter fits a wide range of Mercruiser models, but double-checking never hurts. You can find this information in your owner’s manual or on Mercury Marine’s website.
Price and Value Considerations
I found that purchasing the 2-pack offers better value over buying single units. While the upfront cost might seem higher, the convenience and readiness for future oil changes make it worthwhile. Plus, genuine parts like these help avoid costly engine repairs down the line.
My Tips for Using and Storing the Filters
Once I buy these filters, I keep one stored in a clean, dry place so it’s ready when I need it next. I also make sure to replace the filter during every oil change to maintain engine health. Remember to dispose of used filters properly to protect the environment.
Final Thoughts
If you own a Mercruiser engine like I do, the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 is a smart buy. It offers reliability, compatibility, and convenience that makes maintaining my boat’s engine easier. I hope my guide helps you make an informed choice for your marine maintenance needs!
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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