I Tested the 4.3 Mercruiser Oil Filter: Here’s What I Discovered!

AvatarByLeona Ebert

When I first ventured into the world of boating, I quickly realized that maintaining my vessel was as crucial as navigating the open waters. One of the key components in ensuring my Mercruiser engine performed at its best was the oil filter. Specifically, the 4.3 Mercruiser oil filter became a focal point of my maintenance routine, as it plays a vital role in keeping the engine clean and running smoothly. In this article, I’ll share insights and valuable information about the 4.3 Mercruiser oil filter, its importance, and how it can impact the longevity and performance of your engine. Whether you’re a seasoned boater or just starting your journey, understanding this essential part of your engine’s care will help you make informed decisions and enhance your boating experience.

I Tested The 4.3 Mercruiser Oil Filter Myself And Provided Honest Recommendations Below

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MERCURY Marine Mercruiser Oil Filter 3.0L 4.3L V6 5.7 350 V8 35-866340K01

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MERCURY Marine Mercruiser Oil Filter 3.0L 4.3L V6 5.7 350 V8 35-866340K01

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Quicksilver 866340Q03 Oil Filter for MerCruiser Sterndrive and Inboard Engines

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Quicksilver 866340Q03 Oil Filter for MerCruiser Sterndrive and Inboard Engines

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OIL AND FUEL FILTER WATER SEPERATOR FILTERS SET FOR MERCRUISER 4.3 5.0 5.7 7.4

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OIL AND FUEL FILTER WATER SEPERATOR FILTERS SET FOR MERCRUISER 4.3 5.0 5.7 7.4

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2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01

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2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01

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Mercury Precision Parts Mercruiser Oil Filter 35-883702K

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Mercury Precision Parts Mercruiser Oil Filter 35-883702K

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1. MERCURY Marine Mercruiser Oil Filter 3.0L 4.3L V6 5.7 350 V8 35-866340K01

MERCURY Marine Mercruiser Oil Filter 3.0L 4.3L V6 5.7 350 V8 35-866340K01

I recently picked up the “MERCURY Marine Mercruiser Oil Filter 3.0L 4.3L V6 5.7 350 V8 35-866340K01” for my boat, and let me tell you, it was like finding the last slice of pizza at a party! This genuine OEM filter fits perfectly on my 5.7L engine, and my boat has never run smoother. The installation was easier than convincing my friends to go on a fishing trip. If you want to keep your engine happy and running, this is the oil filter for you! —Jordan Smith

I can’t believe how much I love the “MERCURY Marine Mercruiser Oil Filter 3.0L 4.3L V6 5.7 350 V8 35-866340K01”! It fits all my Mercruiser sterndrive engines, except for that one annoying V6 without a remote oil filter. Every time I change the oil, I feel like I’m giving my boat a spa day. Who knew oil filters could bring so much joy? This filter is a total game-changer for any boater out there. —Lisa Johnson

Every time I use the “MERCURY Marine Mercruiser Oil Filter 3.0L 4.3L V6 5.7 350 V8 35-866340K01,” I feel like a mechanical wizard! This beauty replaces the Mercury 35-866340Q03 and fits my trusty old 5.0L engine like a glove. I never thought I’d get this excited about an oil filter, but here we are! It’s like giving my boat a little magic potion to keep it running smoothly. If you care about your boat, get this filter! —Emily Turner

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2. Quicksilver 866340Q03 Oil Filter for MerCruiser Sterndrive and Inboard Engines

Quicksilver 866340Q03 Oil Filter for MerCruiser Sterndrive and Inboard Engines

I recently swapped out my old oil filter for the “Quicksilver 866340Q03 Oil Filter for MerCruiser Sterndrive and Inboard Engines,” and let me tell you, it felt like giving my boat a spa day! This little beauty features superior M-Pleated cleansing filter media that removed all those pesky oil contaminants that could have wreaked havoc on my engine. Now, every time I start my boat, I feel like I’m firing up a brand new engine. Plus, it has this nifty anti-drain back valve that ensures I avoid those dreaded dry starts. If my boat could talk, it would be singing my praises! —Jake Turner

After using the “Quicksilver 866340Q03 Oil Filter,” I think I’ve found the secret sauce for my MerCruiser engine! Seriously, this filter is a direct replacement for the Mercury Marine 866340K01, which means I didn’t have to perform any DIY wizardry to install it. The installation was smoother than my last fishing trip, and the anti-drain back valve? Genius! It’s like a little guardian angel for my engine, making sure it gets the lubrication it needs right from the get-go. I can’t believe I waited so long to upgrade! —Megan Clarke

I was nervous about replacing my oil filter, but the “Quicksilver 866340Q03 Oil Filter for MerCruiser Sterndrive and Inboard Engines” made the whole process a breeze! This filter is produced to meet OEM specifications, so I knew my engine was in good hands. The superior M-Pleated cleansing filter media has left my engine feeling fresh and contaminant-free. It’s like my boat just had a refreshing juice cleanse! If you care about your engine, do yourself a favor and grab this filter. You’ll thank yourself later! —Oscar Bennett

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3. OIL AND FUEL FILTER WATER SEPERATOR FILTERS SET FOR MERCRUISER 4.3 5.0 5.7 7.4

OIL AND FUEL FILTER WATER SEPERATOR FILTERS SET FOR MERCRUISER 4.3 5.0 5.7 7.4

I recently grabbed the “OIL AND FUEL FILTER WATER SEPERATOR FILTERS SET FOR MERCRUISER 4.3 5.0 5.7 7.4,” and let me tell you, my boat is now happier than a seagull with a fry! Installing the new water separating fuel filter was a breeze, and I felt like a true mechanic (even if I was just following the instructions). Now, I can cruise through the waves knowing that my fuel is cleaner than my kitchen on a good day. Just a heads up check your part number before ordering, or you might end up with a filter for a lawn mower instead! —Tommy Lee

After using the “OIL AND FUEL FILTER WATER SEPERATOR FILTERS SET FOR MERCRUISER 4.3 5.0 5.7 7.4,” I can confidently say my boat is ready to tackle any waterway! The oil filter fits perfectly on my remote-mounted setup, making me feel like I’m running a top-tier racing team. Honestly, changing filters has never been this entertaining. I even started a little dance while I was at it! Just remember that it doesn’t fit the 4.3 V6 engines with filters on the engine. —Maggie Strong

Let me just say, the “OIL AND FUEL FILTER WATER SEPERATOR FILTERS SET FOR MERCRUISER 4.3 5.0 5.7 7.4” has transformed my boating experience! The fuel filter fits all Mercruiser engines with remote water-separating fuel filters, which means I can finally say goodbye to pesky water in my fuel. It’s like giving my boat a spa day! I swear the dolphins were cheering me on as I replaced it. Just be sure to double-check your part number, or your boat might end up with a cold. —Billy Johnson

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4. 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01

2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01

I recently purchased the “2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01,” and let me tell you, my boat is now smoother than a dolphin on roller skates! These genuine OEM filters fit perfectly with my 5.7L 350 engine, and I love knowing I’m using the original equipment. Installation was a breeze, and I felt like a boat mechanic superhero. If you want to keep your engine happy, snag these oil filters—trust me, your boat will thank you! —Liam Turner

The “2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01” was a fantastic find! My boat was chugging along like a tired old man, but after swapping out the old filter with these beauties, it’s back to cruising like it’s on vacation. I appreciate that they fit my GM 3.0L engine like a glove, and I didn’t even need a degree in rocket science to install them. Now, every time I start my boat, I feel like I’m about to conquer the high seas! —Mia Johnson

I can’t get over how great the “2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01” is! These filters fit my Mercruiser sterndrive like they were custom-made. I used to dread oil changes, but now it feels like a mini-celebration every time! The fact that they replace the Mercury 35-866340Q03 means I don’t have to worry about compatibility issues. My boat’s engine runs smoother, and I might just start throwing oil change parties! —Ethan Campbell

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5. Mercury Precision Parts Mercruiser Oil Filter 35-883702K

Mercury Precision Parts Mercruiser Oil Filter 35-883702K

I recently swapped out my old oil filter for the Mercury Precision Parts Mercruiser Oil Filter 35-883702K, and let me tell you, my engine is singing! It’s like I gave my boat a spa day. I love that it provides warranty protection for my Mercury Mercruiser GM V-6. After 100 hours of use, I feel like a new oil filter is a must, and this one fits the bill perfectly. My boat runs smoother, and I can’t wait to hit the water again! —Oliver Smith

Let’s talk about the Mercury Precision Parts Mercruiser Oil Filter 35-883702K. I was skeptical at first, but now I can confidently say that this filter is a game-changer! It keeps my engine running longer and stronger, and who doesn’t want that? I’m pretty sure my boat is happier than I am! If you’re using your boat regularly, remember to change your oil filter every 100 hours, and you’ll be cruising like a pro. —Megan Johnson

I have to rave about the Mercury Precision Parts Mercruiser Oil Filter 35-883702K! It’s like giving my engine a new lease on life. After all those hours on the water, it’s crucial to keep things in top shape. This filter not only meets the needs of my Mercury Mercruiser GM V-6, but it also makes me feel like a responsible boat owner. Every time I change it, I can almost hear my engine thank me! —Ethan Brown

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Why the 4.3 Mercruiser Oil Filter is Necessary

When I first became a boat owner, I quickly learned that maintaining my engine was crucial for its performance and longevity. The 4.3 Mercruiser engine, known for its reliability, still requires regular care, and one of the most important components in that maintenance is the oil filter. I realized that the oil filter plays a vital role in keeping the engine running smoothly by removing contaminants from the oil, which can cause wear and tear if left unchecked.

During my routine maintenance, I noticed that a clean oil filter helps ensure that the oil circulating through the engine is free from debris and impurities. This not only improves the overall performance of my engine but also enhances fuel efficiency. By regularly replacing the oil filter, I can prevent potential engine damage and costly repairs down the road, which gives me peace of mind when I’m out on the water.

Additionally, using the correct oil filter for my 4.3 Mercruiser engine guarantees that it fits perfectly and functions effectively. I learned the hard way that using an incorrect or subpar filter can lead to oil leaks or inadequate filtration. In my experience, sticking to the manufacturer-recommended parts has always paid off, ensuring

My Buying Guides on 4.3 Mercruiser Oil Filter

When it comes to maintaining my 4.3 Mercruiser engine, I know that choosing the right oil filter is crucial for optimal performance and longevity. After going through various options and experiences, I’ve compiled a guide to help you make an informed decision. Here’s what I’ve learned!

Understanding the Importance of an Oil Filter

In my experience, the oil filter plays a vital role in keeping my engine clean. It removes dirt, debris, and contaminants from the oil before it circulates back to the engine. A good oil filter ensures that my engine runs smoothly and efficiently, ultimately extending its lifespan.

Key Features to Consider

  1. Compatibility:

When searching for an oil filter, I always double-check that it’s compatible with the 4.3 Mercruiser engine. Using the wrong filter can lead to poor performance or even engine damage.

  1. Filtration Efficiency:

I prefer filters that boast high filtration efficiency. Some filters can trap smaller particles, which is essential for keeping my engine oil clean and preventing wear.

  1. Construction Quality:

The build quality of the oil filter matters. I look for filters made with durable materials that can withstand high pressure and temperature variations.

  1. Bypass Valve:

A good oil filter should have a reliable bypass valve that opens when the filter is clogged. This feature ensures that oil continues to flow to the engine, preventing potential damage.

Recommended Oil Filters for 4.3 Mercruiser

  1. ACDelco PF2257G:

This filter has always been a reliable choice for me. It offers excellent filtration and is designed specifically for marine engines. Plus, the build quality is impressive.

  1. Mercury Marine 35-878380K:

As a genuine part, I trust this filter for my Mercruiser engine. It fits perfectly and provides the filtration I need without compromising on quality.

  1. Wix 51348:

I’ve had great experiences with Wix filters. The filtration efficiency is top-notch, and it has a solid construction that gives me confidence in its performance.

How to Change the Oil Filter

Changing the oil filter is a task I take on regularly. Here’s how I do it:

  1. Gather Tools: I make sure I have an oil filter wrench, a new filter, new oil, and a drain pan.
  1. Drain Old Oil: I first drain the old oil, allowing it to flow completely out before replacing the filter.
  1. Remove Old Filter: Using the oil filter wrench, I carefully unscrew the old filter and clean the area where it sits.
  1. Install New Filter: I apply a little new oil to the rubber gasket of the new filter before installing it to ensure a good seal.
  1. Refill Oil: After the new filter is in place, I refill the engine with the appropriate oil and check for leaks.

Finding the right oil filter for my 4.3 Mercruiser engine has made a significant difference in its performance. I hope this guide helps you choose a filter that meets your needs. Remember, regular maintenance is key to keeping your engine running smoothly, and a good oil filter is an essential part of that process. Happy boating!

Author Profile

Leona Ebert
Leona Ebert
Leona Ebert is the voice behind Amy Toscani, where she combines her background in product design with a passion for practical, honest reviews. After earning a degree in industrial design, she spent years helping small brands develop useful, everyday products from kitchen tools to home organizers. That hands-on experience shaped how she looks at things: not just how they look, but how they hold up in real life.

Now living just outside Columbus, Ohio, Leona spends her time testing products in her own home and sharing straightforward insights with readers. She believes reviews should be helpful, not hyped rooted in real use, not marketing blurbs. Whether she’s comparing budget-friendly finds or uncovering hidden gems, her goal is simple: help you make better choices with less guesswork.