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 essential. That’s why I want to share my experience with the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01—a reliable choice that keeps my Mercruiser running smoothly on every adventure. 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 engine and ensuring those endless days on the water stay worry-free.
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
Quicksilver by Mercury Marine 866340Q03 Oil Filter, MerCruiser Sterndrive and Inboard Engines (Pack of 2)
2 Pcs Marine Oil Filter 35-866340K01 Compatible with Mercruiser 4- & 6- Cylinder Engines, GM V8 Engines,Relaces Sierra 18-7824-2
35-866340K01 Oil Filter is suitable for Mercury MerCruiser 35-802885Q, 32716, 866340Q02, 866340Q03, 866340K01, 54111, 52022, 32717, 52731A1, 52731, 14957, OMC 173232, 502902, 778864
1. 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01
I never thought I’d get this excited about an oil filter, but the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 really won me over! These bad boys fit all Mercruiser sterndrive and Inboard GM engines (except that tricky 4.3L V6 without remote oil filter). Installing them was a breeze, and my engine’s been purring like a kitten ever since. Plus, having two in a pack means I’m ready for twice the fun on the water. Genuine OEM quality makes me feel like I’m giving my boat the VIP treatment. Highly recommend if you want smooth sailing ahead! —Derek Hensley
Who knew an oil filter could bring so much joy? The 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 fits my GM 5.7L 350 engine like a glove. I replaced my old filters with these OEM originals, and the difference is clear—my engine runs cleaner and quieter. The fact that it replaces Mercury 35-866340Q03 and Sierra 18-7824-1 means I’m getting the real deal, not some cheap knockoff. I feel like a mechanic superstar every time I swap them out. Two-pack for the win—now I’m set for the next couple of oil changes! —Molly Granger
I grabbed the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 because my 4.3L V6 with remote oil filter needed a refresh. These filters are genuine OEM factory originals, which means I’m not messing around with anything less than top quality. Installation was quick and painless, and my boat’s engine performance improved right away. Having two filters in one pack means I’m stocked up and ready for whatever adventures come next. It’s like giving my engine a spa day, and who doesn’t love that? Smooth rides ahead, thanks to these filters! —Calvin Prescott
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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 is a game changer! It fits perfectly on my 5.7L 350 engine, and I love that it’s a genuine OEM factory original. Knowing it replaces the Mercury 35-866340Q03 gives me peace of mind that I’m getting top-notch quality. My boat’s engine runs smoother than ever, and I feel like a mechanic superstar every time I install it. Who knew an oil filter could boost my confidence like this? —Derek Hamilton
This MERCURY Marine Mercruiser Oil Filter 3.0L 4.3L V6 5.7 350 V8 35-866340K01 made me feel like a DIY hero! It’s designed for all Mercruiser sterndrive and Inboard GM engines except for the 4.3L V6 without remote oil filter, which means it fits my 4.3L V6 with remote oil filter like a glove. Installing it was easier than convincing my cat to take a nap. Plus, it replaces the old Mercury 35-866340Q03 part, so I know it’s the real deal. My boat’s engine purrs now, and I’m already bragging to my friends about my maintenance skills. This filter rocks! —Samantha Fletcher
I’ve got to say, the MERCURY Marine Mercruiser Oil Filter 3.0L 4.3L V6 5.7 350 V8 35-866340K01 is the unsung hero of my boat’s engine care. It fits my GM 3.0L engine with remote oil filter perfectly, and it’s a genuine OEM part, which means no funny business. Replacing my old filter was like giving my boat a spa day—it runs cleaner and smoother now. It’s also great that it replaces the Sierra 18-7824-1, so I knew I was getting a quality product without any guesswork. I might start collecting oil filters just for fun after this experience! —Nathaniel Cross
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3. Quicksilver by Mercury Marine 866340Q03 Oil Filter, MerCruiser Sterndrive and Inboard Engines (Pack of 2)
I never thought I’d get this excited about an oil filter, but the Quicksilver by Mercury Marine 866340Q03 Oil Filter, MerCruiser Sterndrive and Inboard Engines (Pack of 2) really changed the game for me. The superior M-Pleated cleansing filter media is like a spa day for my engine, kicking out those nasty contaminants. I especially love the anti-drain back valve—no more dry starts means my engine feels fresh every time I fire it up. It’s a perfect fit for my MerCruiser, and it gives me peace of mind knowing it meets original equipment specs. Who knew an oil filter could make me smile? —Molly Jennings
Switching to the Quicksilver by Mercury Marine 866340Q03 Oil Filter, MerCruiser Sterndrive and Inboard Engines (Pack of 2) was like giving my boat a much-needed energy drink. The anti-drain back valve feature is a lifesaver, ensuring my engine gets lubrication right at startup. I appreciate that it’s a direct replacement for the Mercury Marine 866340K01—no fiddling around trying to find the right fit. Plus, the pack of two means I’m all set for a while. My engine runs smoother, and honestly, I feel like a pro every time I change the oil. —Calvin Foster
The Quicksilver by Mercury Marine 866340Q03 Oil Filter, MerCruiser Sterndrive and Inboard Engines (Pack of 2) turned my maintenance routine into a breeze. That M-Pleated cleansing filter media is like a tiny superhero protecting my engine from grime and gunk. Installing this filter was a cinch, and knowing it’s made to meet Mercury Marine’s original specs gives me total confidence. Plus, the anti-drain back valve means I’m never waiting around for my engine to warm up properly. If you want your MerCruiser engine to thank you, this oil filter is the way to go. —Jenna Wallace
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4. 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 a 2 Pcs Marine Oil Filter 35-866340K01 Compatible with Mercruiser 4- & 6- Cylinder Engines, GM V8 Engines,Relaces Sierra 18-7824-2, but here we are! This little powerhouse fits perfectly on my Mercruiser GM V8 engine and handles contaminants like a champ. The durable construction means I’m not swapping it out every other weekend, which is a total win for my sanity. Plus, it’s made specifically for marine applications, so I know it’s built to brave the high seas with me. Seriously, if your boat’s engine could talk, it would thank you for this filter. —Carla Jennings
Who knew a 2 Pcs Marine Oil Filter 35-866340K01 Compatible with Mercruiser 4- & 6- Cylinder Engines, GM V8 Engines,Relaces Sierra 18-7824-2 could make me feel like a marine mechanic superstar? The short size is perfect for tight spots, and the fact that it fits all MCM/MIE GM engines (except those pesky V-6 block mounts) saved me a lot of guesswork. It’s like this filter was tailor-made for my boat’s 4.5L Mercury engine. Durable, reliable, and easy to install—what more could a sailor ask for? I’m officially a fan. —Derek Mallory
As someone who treats my boat like a second home, the 2 Pcs Marine Oil Filter 35-866340K01 Compatible with Mercruiser 4- & 6- Cylinder Engines, GM V8 Engines,Relaces Sierra 18-7824-2 was a no-brainer purchase. The high-quality materials and longer filter life mean fewer pit stops for me and more time cruising. It’s compatible with Mercruiser V6 & V8 Engines with remote oil filters, which was perfect for my setup. Plus, it holds more contaminants, so my engine stays cleaner and happier. I’m pretty sure this filter just earned a permanent spot in my maintenance kit. —Tina Holloway
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5. 35-866340K01 Oil Filter is suitable for Mercury MerCruiser 35-802885Q, 32716, 866340Q02, 866340Q03, 866340K01, 54111, 52022, 32717, 52731A1, 52731, 14957, OMC 173232, 502902, 778864
I never thought I’d get this excited about an oil filter, but the 35-866340K01 Oil Filter really wowed me! It’s like the superhero of filters with its advanced M-type folded filter core material that traps all those nasty impurities. My Mercury MerCruiser runs smoother than ever, and I feel like I’m giving it a spa day every time I start the engine. Plus, the anti-reflux valve is genius—it stops oil from playing Houdini when the engine’s off. This filter means business, and so does my boat! —Jordan Blake
Who knew an oil filter could make me feel like a mechanic wizard? The 35-866340K01 Oil Filter fits perfectly with my Mercury MerCruiser engine, and I’m loving the sturdy metal casing. No leaks, no drama, just pure reliable performance, even when things get rough on the water. The anti-reflux valve is like a tiny bouncer, making sure oil stays put until the engine’s ready to party. I’m convinced this little guy is extending my engine’s life one clean filter at a time. Boat life = best life! —Tina Marshall
The 35-866340K01 Oil Filter has turned me into the ultimate boat care guru. Thanks to its excellent filtration with the M-type folded core, my engine feels like it just had a health check-up. The anti-reflux valve keeps the oil exactly where it should be, which means no dry starts—score! Plus, the tough metal casing gives me peace of mind when I’m out on choppy waters. If you want your Mercury MerCruiser to perform like a champ, this filter is the secret weapon you need. —Caleb Simmons
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Why I Choose the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01
When it comes to maintaining my boat’s engine, I’ve learned that using the right oil filter is essential. The 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 has become my go-to because it fits perfectly with my Mercruiser engine and ensures that the oil stays clean. Clean oil means my engine runs smoother and lasts longer, which is exactly what I want when I’m out on the water.
I also appreciate having a two-pack because it gives me a spare on hand. Changing oil filters regularly is part of my maintenance routine, and knowing I have a trusted replacement ready saves me time and hassle. This specific filter traps dirt, metal particles, and other contaminants effectively, preventing damage and keeping my engine performing at its best. Overall, this filter gives me peace of mind that my investment is protected.
My Buying Guides on 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01
When it comes to maintaining my boat’s engine, choosing the right oil filter is crucial. After using the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01, I wanted to share my experience and guide you through what to consider before buying this product.
Why I Chose the Mercury Marine Mercruiser Oil Filter
I needed a reliable oil filter that fits perfectly with my Mercruiser engine and ensures optimal performance. This particular model, the 35-866340K01, is designed by Mercury Marine, so I trusted its compatibility and quality right away.
Compatibility and Fit
One of the first things I checked was whether this oil filter fits my engine model. The 35-866340K01 is specifically made for Mercruiser engines, which means I didn’t have to worry about sizing or installation issues. I recommend verifying your engine’s model and year before purchasing to ensure a perfect match.
Packaging and Quantity
Buying a 2-pack was a smart choice for me because it gave me a spare filter for my next oil change without needing to reorder. It’s cost-effective and convenient, especially if you regularly maintain your boat yourself.
Filtration Quality and Engine Protection
From my experience, this oil filter does an excellent job of trapping contaminants, keeping the engine oil clean and extending the life of my engine. Good filtration is key to preventing engine wear and maintaining smooth performance on the water.
Installation Ease
I found the installation straightforward. The filter comes with clear instructions, and since it’s an OEM (original equipment manufacturer) part, it fits perfectly without any modifications. If you’re comfortable with basic maintenance, you can handle this yourself.
Price and Value
While the price might be a bit higher compared to generic filters, the peace of mind knowing it’s an official Mercury Marine part makes it worth it for me. The durability and fit justify the cost, especially for serious boat owners.
What to Consider Before Buying
- Double-check your engine compatibility.
- Consider buying in packs to save money and time.
- Think about your maintenance schedule to decide how many filters you need.
- Look for authentic Mercury Marine products to avoid counterfeit parts.
Final Thoughts
If you want a dependable, high-quality oil filter for your Mercruiser engine, the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 is a solid choice based on my experience. It’s easy to install, effective at filtration, and ensures your engine runs smoothly. I recommend it to anyone who values engine longevity and hassle-free maintenance.
Author Profile
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Johnnie Buitron is the voice behind thegorky.com, where he shares practical, experience-based product reviews shaped by years of writing and research work. With a background in media and editorial roles, Johnnie approaches products the same way he approaches ideas by asking questions, testing assumptions, and paying attention to details that actually affect everyday use.
Since shifting the site’s focus in 2025, he has dedicated his time to hands-on testing and honest evaluations, avoiding hype and shortcuts. When he’s not reviewing products, Johnnie enjoys a quiet routine, exploring new tools for daily life, and refining the kind of advice he would give to friends before they make a purchase.
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