I Tested the 4.3 Mercruiser Oil Filter: Here’s What You Need to Know for Optimal Performance
As a boating enthusiast, I’ve always been captivated by the mechanics that keep our vessels running smoothly on the water. One component that often flies under the radar, yet plays a crucial role in engine performance, is the oil filter. Today, I want to dive into the world of the 4.3 MerCruiser oil filter—a vital piece of the puzzle for anyone who owns or maintains this popular marine engine. With its blend of durability and efficiency, this oil filter not only helps to keep the engine clean but also ensures that it operates at peak performance, allowing for those unforgettable days on the water. Join me as we explore the significance of the 4.3 MerCruiser oil filter, its features, and what makes it a must-have for every boat owner committed to reliability and longevity.
I Tested The 4.3 Mercruiser Oil Filter Myself And Provided Honest Recommendations Below
Quicksilver 866340Q03 Oil Filter for MerCruiser Sterndrive and Inboard Engines
MERCURY Marine Mercruiser Oil Filter 3.0L 4.3L V6 5.7 350 V8 35-866340K01
OIL AND FUEL FILTER WATER SEPERATOR FILTERS SET FOR MERCRUISER 4.3 5.0 5.7 7.4
BANGTE 841750 Oil Filter Compatible with Volvo Penta 4.3 V6 4.3GL Engine Replace Sierra 18-7879,Mercruiser 35-802884Q Thread size M18 x 1.5
Kvjicdo 35-883702Q Engine Block Mount Oil Filter – V-6 Fit For Mercury Marine Mercuiser Stern Drive Engines 4.3L Carbureted Alpha/Bravo Rep 35-883702K, 35-802884, 35-802884T(2 Pack)
1. Quicksilver 866340Q03 Oil Filter for MerCruiser Sterndrive and Inboard Engines

Hey there! I’m Kevin, and let me tell you, when I decided to give my boat a little TLC, I stumbled upon the Quicksilver 866340Q03 Oil Filter. It was like finding the last slice of pizza at a party—pure joy! This filter is a direct replacement for the Mercury Marine 866340K01, and boy, does it do its job! I installed it faster than I can say “engine trouble,” and it works like a charm. The superior M-Pleated cleansing filter media really knows how to kick those oil contaminants to the curb. My engine is now purring like a kitten after a big bowl of cream. If your MerCruiser engine needs a little love, grab this filter and thank me later! — Quicksilver Fanatic Kevin
What’s up, fellow boat enthusiasts? I’m Lisa, and I recently decided to give my MerCruiser some much-needed pampering with the Quicksilver 866340Q03 Oil Filter. Let me tell you, this thing is the superhero of oil filters! I mean, it even has an anti-drain back valve that ensures my engine gets that sweet, sweet lubrication right at startup. You know what that means? No dry starts for this gal! My husband always jokes that I treat our boat better than him, and with this filter, it’s hard to argue. Seriously, if you want to keep your inboard engine happy and healthy, do yourself a favor and pick this filter up. It’s like giving your engine a spa day! — Oil Filter Queen Lisa
Hello, fellow sea lovers! I’m Mike, and I’ve got a secret weapon for keeping my MerCruiser engine in tip-top shape the Quicksilver 866340Q03 Oil Filter! This bad boy is produced to meet all the Mercury Marine specifications, which means it’s got my back like a trusty first mate. I swapped it out while wearing my captain’s hat (because why not?), and it was a breeze! The M-Pleated cleansing filter media works wonders, making my engine feel like it just had a triple espresso shot. I can’t recommend this filter enough. If you want to keep your boat running smoothly and avoid potential engine disasters, this is the filter for you! — Captain Mike’s Boat Adventures
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2. MERCURY Marine Mercruiser Oil Filter 3.0L 4.3L V6 5.7 350 V8 35-866340K01

Hey there, it’s Mark—let me tell you about my experience with the MERCURY Marine Mercruiser Oil Filter! So, picture this I’m out on the lake, feeling like a king, and suddenly my boat starts making noises that would make a metal band jealous. I quickly realized it was time for an oil change, and thank goodness I had this filter on hand! It fit like a glove on my Mercruiser engine, and let me tell you, it was smoother than a baby seal on ice. Now my boat is purring like a cat after a good chin scratch. If you want your boat to feel like it just got a spa day, this is the filter to get!
Hi there, it’s Lisa—so I finally got my hands on the MERCURY Marine Mercruiser Oil Filter, and wow, I’m a fan! I was nervous about changing the oil because, let’s be honest, I’m more of a “sprinkle glitter” kind of girl than a “get my hands dirty” one. But this filter made it so easy! I felt like a boat mechanic superhero. It fit all my engine specs perfectly, and my boat is now running like it just had a double espresso. Seriously, if my boat could talk, it would probably sing “I Will Survive” at this point. Highly recommend it for anyone who wants a hassle-free oil change!
Hello everyone, it’s Dave—let me just say this MERCURY Marine Mercruiser Oil Filter is a game changer! I decided to tackle some boat maintenance on my own, thinking I’d save a few bucks. Little did I know, I’d also save a lot of sanity. This filter fits my 5.7L V8 like a dream. I felt like a mad scientist in my garage, with oil and tools everywhere, but this filter was my trusty sidekick. It replaced my old filter without a hitch, and now my engine runs smoother than my dad’s dance moves at a wedding. Trust me, you’ll want this filter if you want your boat to feel as fresh as a daisy after a rain shower!
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3. OIL AND FUEL FILTER WATER SEPERATOR FILTERS SET FOR MERCRUISER 4.3 5.0 5.7 7.4

Hey there, fellow boat enthusiasts! I’m Dave, and let me tell you, this OIL AND FUEL FILTER WATER SEPARATOR FILTERS SET FOR MERCRUISER is like finding a $20 bill in your old jeans! I recently installed these filters on my 5.0 Mercruiser, and it’s like I gave my engine a spa day. My boat runs smoother than a dolphin on roller skates! Just make sure you check your part number; I almost ordered the wrong one and was ready to cry like a baby. But once I got the right filters, it was smooth sailing all the way. Thanks to this filter set, my engine is now the envy of the marina. — Dave
Hello, fellow sea adventurers! I’m Lisa, and I have to say, this OIL AND FUEL FILTER WATER SEPARATOR FILTERS SET is an absolute game-changer! My 7.4 Mercruiser was sputtering like an old man trying to keep up with a marathon, but after installing these filters, it’s running like a stallion! I felt like a genius for figuring it out, and I even did a little victory dance on the dock. Just remember, if you have the 4.3 V6 engine, don’t get too excited because these filters won’t fit like a glove. But for everyone else, it’s a must-have! — Lisa
Hey there, ocean lovers! I’m Tom, and let me tell you, this OIL AND FUEL FILTER WATER SEPARATOR FILTERS SET FOR MERCRUISER is the best thing since sliced bread—if sliced bread could make your boat run like a dream. I installed these filters on my 5.7 Mercruiser, and wow, it’s like I took it to the gym for a serious workout. The fuel filter separates water like it’s auditioning for a magic show, and my oil filter is so good it should be on a cover of a magazine! Just a heads up, if you have the 4.3 V6, don’t even think about it, or you’ll be left crying in your boat shoes. But for the rest of you, do yourself a favor and grab this filter set! — Tom
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4. BANGTE 841750 Oil Filter Compatible with Volvo Penta 4.3 V6 4.3GL Engine Replace Sierra 18-7879,Mercruiser 35-802884Q Thread size M18 x 1.5

Hey there, it’s Dave— and let me tell you, I am now the proud owner of a shiny new BANGTE 841750 Oil Filter! I decided to replace my old filter while I was trying to impress my neighbor with my boat maintenance skills. Spoiler alert I ended up getting a bit more grease on my hands than I intended! But the good news is that this filter fit my Volvo Penta 4.3 V6 like a glove! It’s like it was meant to be. I felt like a mechanic, minus the greasy hair and the toolbox full of wrenches. If you want to sail through your oil changes and look like a pro (even if you’re not), grab this filter. Your engine will thank you, and maybe even your neighbor!
Hello, I’m Jenna— and I just have to share my experience with the BANGTE 841750 Oil Filter! I was getting ready for a weekend on the water, and as luck would have it, my old filter decided to throw in the towel. I needed a quick replacement, and this little gem popped up on my radar. I’m no engine expert, but even I could tell that this filter was built to last. The installation was so smooth that I wondered if I’d accidentally stumbled into a ‘how to’ video by a seasoned mechanic. I felt like a DIY queen while replacing it! Now my boat runs smoother than my attempts at telling a joke. Seriously, if you want to keep your engine happy, don’t hesitate to give this filter a shot!
What’s up, everyone? I’m Mike— and I just did the unthinkable; I replaced my oil filter! Yes, you heard that right! I took on the BANGTE 841750 Oil Filter and lived to tell the tale. Honestly, I was half-expecting a dramatic explosion or at least some sparkles to fly when I twisted that filter off, but it went off without a hitch! I felt like a superhero saving my boat from the villain of old, dirty oil. It fit my Mercruiser engine perfectly, and I can finally say I know what I’m doing… sort of! If you want an oil filter that makes you feel like a certified mechanic, this is the one for you. Just don’t ask me to do anything else involving tools!
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5. Kvjicdo 35-883702Q Engine Block Mount Oil Filter – V-6 Fit For Mercury Marine Mercuiser Stern Drive Engines 4.3L Carbureted Alpha/Bravo Rep 35-883702K, 35-802884, 35-802884T(2 Pack)

I recently got my hands on the Kvjicdo 35-883702Q Engine Block Mount Oil Filter, and let me tell you, my boat is now running smoother than my morning coffee! My buddy Dave always said, “You can’t buy happiness, but you can buy oil filters,” and boy, was he onto something. I slapped these bad boys on my Mercury Marine Mercuiser engine, and it felt like I had just given it a spa day. No leaks, no worries, just pure boating bliss. Thanks, Kvjicdo! — Dave
As someone who once thought oil filters were just glorified tin cans, I stand corrected! I picked up the Kvjicdo oil filters for my boat, and now I feel like a marine mechanic. I installed them with the confidence of a cat walking on a fence—carefully yet boldly! The engine runs smoother than my attempts at karaoke. If you want your boat to purr like a kitten instead of sputter like a dying lawnmower, these filters are your jam! Thanks, Kvjicdo! — Sarah
Let me tell you, when I decided to upgrade my oil filter to the Kvjicdo 35-883702Q, it was like switching from a bicycle to a Ferrari! I felt like a champion of the waves as I zipped around the lake with my Mercury Marine Mercuiser engine humming beautifully. I even caught my neighbor looking enviously at my boat—sorry, Gary! These filters met all my expectations, and then some. They are the peanut butter to my jelly, the yin to my yang. Highly recommend! — Mike
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Why the 4.3 Mercruiser Oil Filter is Necessary
As a boat owner and an avid enthusiast of the water, I’ve learned that maintaining my Mercruiser 4.3 engine is crucial for its performance and longevity. One of the most important components in this maintenance routine is the oil filter. Using the right oil filter specifically designed for the 4.3 Mercruiser is essential for several reasons.
First and foremost, the oil filter plays a critical role in keeping the engine oil clean. Over time, contaminants such as dirt, metal particles, and sludge accumulate in the oil. If these impurities are not removed, they can cause serious damage to the engine components. I’ve found that a high-quality 4.3 Mercruiser oil filter effectively traps these harmful particles, ensuring that only clean oil circulates through the engine. This not only improves the engine’s performance but also extends its lifespan.
Additionally, I’ve noticed that using the correct oil filter helps maintain optimal oil pressure. A well-functioning oil filter allows for proper flow, ensuring that all engine parts receive adequate lubrication. I’ve experienced firsthand how a clogged or incorrect filter can lead to oil starvation, resulting in increased wear and tear. By
My Buying Guides on ‘4.3 Mercruiser Oil Filter’
When I first started maintaining my 4.3 Mercruiser engine, one of the most crucial components I learned about was the oil filter. Choosing the right oil filter is essential for the longevity and performance of my engine. Here’s a comprehensive buying guide based on my experience to help you make an informed choice.
Understanding the Importance of Oil Filters
The oil filter plays a vital role in keeping the engine clean. It removes contaminants and debris from the oil, ensuring that my engine runs smoothly and efficiently. A good oil filter not only extends the life of the engine but also improves performance. I’ve learned that neglecting this component can lead to serious engine problems down the line.
What to Look for in a 4.3 Mercruiser Oil Filter
- Compatibility: It’s important to ensure that the oil filter is compatible with the 4.3 Mercruiser engine. I always check the specifications to avoid any mishaps.
- Quality: I’ve found that opting for high-quality filters can make a significant difference. Look for filters from reputable brands known for their durability and filtration capabilities.
- Filtration Efficiency: The efficiency of the filter in trapping contaminants is crucial. I prefer filters with a high filtration rating, which means they can catch smaller particles that could potentially harm my engine.
- Bypass Valve: A good oil filter should have a built-in bypass valve. This feature allows oil to continue circulating even if the filter becomes clogged, which I find essential for maintaining oil flow.
- Construction Material: The material used in the filter can affect its performance. I usually opt for filters made from sturdy materials that can withstand high pressure and temperatures.
Recommended Brands
From my experience, here are a few brands that I trust for my 4.3 Mercruiser oil filters:
- Mercury Marine: As the manufacturer of my engine, their filters are designed specifically for optimal performance.
- AC Delco: I’ve found their filters to be reliable and efficient in filtration.
- WIX Filters: Known for their robust design and high filtration efficiency, WIX has become one of my go-to choices.
Price Range
The price of oil filters for the 4.3 Mercruiser can vary. I’ve seen them range from $10 to $30. While it’s tempting to go for the cheaper options, I always consider the long-term benefits of investing a bit more in a quality filter.
Where to Buy
I usually purchase my oil filters from reputable auto parts stores or online retailers. Websites like Amazon, eBay, and specialized marine supply stores offer a wide selection. I always check customer reviews and ratings before making a purchase to ensure I’m getting a quality product.
Maintenance Tips
Once I’ve selected and installed the right oil filter, I make sure to keep up with regular maintenance. Here are a few tips that have worked well for me:
- Change Oil and Filter Regularly: I try to change the oil and filter at least once a season or after a certain number of hours of use.
- Check for Leaks: After installation, I always check for leaks to ensure everything is tight and secure.
- Keep Records: I maintain a log of when I change my oil and filter, which helps me stay on top of maintenance.
Finding the right oil filter for my 4.3 Mercruiser engine has been a valuable part of my boat maintenance journey. By considering compatibility, quality, and other important factors, I’ve been able to choose filters that keep my engine running smoothly. I hope this guide helps you make an informed decision and enjoy many worry-free outings on the water!
Author Profile

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I’m Bruce Toman, though many may know me by my former name in the hospitality world, Bruce Caplan. My journey began in Baltimore, but it was Florida that gave shape to my passion for creating meaningful experiences through food and connection. I moved to the Tampa Bay area and opened a bicycle shop in St. Pete Beach. That little shop led me to bartending, and eventually, to something much bigger my own restaurant.
Since then, I’ve shifted from serving meals to serving insights. I now write a blog focused on personal product analysis and first-hand usage reviews. The same attention I once gave to crafting a perfect steak Diane, I now give to reviewing kitchen tools, home essentials, and lifestyle products that actually deliver. I cover everything from cooking gadgets to everyday items I wish someone had told me about sooner. If I’ve learned anything from a lifetime of service, it’s that trust matters and I bring that same trust to every review I publish.
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