Why I Trust the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 for My Boat: An Expert’s Review

As a passionate boater and engine enthusiast, I know how crucial it is to keep our marine engines running smoothly and efficiently. One of the often-overlooked components in this maintenance routine is the oil filter, and that’s where the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 comes into play. This little powerhouse is designed specifically for Mercruiser engines, offering exceptional filtration and reliability that can make a world of difference in the longevity and performance of your boat. In this article, I’ll dive into the benefits of using these oil filters, share my experiences, and explain why investing in quality components like this is essential for any serious boater. Join me as we explore how the right oil filter can enhance your marine experience and keep your engine in top shape for all your adventures on the water.

I Personally Tried the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 and I’m Sharing My Honest Recommendations Below

1. 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01

As someone who is passionate about maintaining my boat and ensuring it runs smoothly, I can’t help but feel excited about the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01. Having a reliable oil filter is crucial for the longevity and performance of my Mercruiser engine, and this product stands out as an excellent choice. With its genuine OEM status, I know I’m getting a factory original part that’s designed specifically for my engine model.

One of the standout features of this oil filter is its compatibility. It fits all Mercruiser sterndrive and inboard GM engines, making it a versatile option for many boat owners. I appreciate that it works with a variety of engine sizes, including the GM 3.0L, 4.3L V6 with remote oil filter, and larger engines like the 5.0L 305 and 5.7L 350. This means that whether I have a small cruiser or a larger performance boat, I can rely on this oil filter to keep my engine running smoothly. It’s reassuring to know that I’m investing in a product that can cater to different models, reducing the hassle of searching for multiple filters.

Additionally, the oil filter replaces both the Mercury 35-866340Q03 and the Sierra 18-7824-1. This interchangeability means that I won’t have to worry about compatibility issues if I’ve previously used either of these filters. It simplifies my purchasing decision, knowing that I can confidently choose this product without second-guessing whether it will fit my needs.

In terms of value, the 2-Pack option is a fantastic deal. Oil changes are a regular part of boat maintenance, and having two filters on hand allows me to save time and money in the long run. I won’t have to make an additional trip to the store or wait for another delivery when it’s time to perform maintenance. Being proactive with my boat’s upkeep is essential, and having these filters ready to go is a game-changer.

For anyone who owns a Mercruiser engine, I highly recommend considering the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01. Not only does it offer the assurance of genuine OEM quality, but its compatibility with a wide range of engines and the convenience of a two-pack make it a smart investment. If you want to ensure your engine runs at peak performance and avoid unnecessary issues down the line, this product is definitely worth adding to your maintenance routine.

Feature	Description
OEM Quality	Genuine factory original equipment part ensuring reliability and performance.
Compatibility	Fits all Mercruiser sterndrive and inboard GM engines (except 4.3L V6 without remote oil filter).
Engine Sizes	Compatible with GM 3.0L, 4.3L V6 with remote oil filter, 5.0L 305, 5.7L 350, and more.
Replaces Other Filters	Replaces Mercury 35-866340Q03 and Sierra 18-7824-1 for added convenience.
Pack Size	Comes in a 2-Pack for cost-effectiveness and convenience.

I believe that investing in the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 is a decision that any boat owner should consider seriously. With its OEM quality, broad compatibility, and the convenience of a two-pack, I feel confident that my engine will remain in excellent condition for years to come. Don’t wait—make the smart choice for your boat today!

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

As someone who values quality and reliability in marine products, I am excited to share my thoughts on the MERCURY Marine Mercruiser Oil Filter 3.0L 4.3L V6 5.7 350 V8 35-866340K01. This oil filter is not just any filter; it is a genuine OEM factory original equipment product specifically designed for Mercruiser engines. This means that it has been manufactured to the same high standards as the original parts that came with your boat, ensuring optimal performance and longevity.

One of the standout features of this oil filter is its versatility. It fits a wide range of Mercruiser sterndrive and inboard GM engines. Specifically, it accommodates GM 3.0L, 4.3L V6 engines equipped with a remote oil filter, as well as the robust 5.0L 305 and 5.7L 350 engines. This extensive compatibility makes it a go-to choice for boat owners who may have various engine types. I find it reassuring to know that I can use the same high-quality filter across different models, streamlining my maintenance routine.

Additionally, the MERCURY Marine Mercruiser Oil Filter replaces other popular part numbers, including the Mercury 35-866340Q03 and Sierra 18-7824-1. This means that if I ever find myself in need of a replacement while out on the water, I can trust that this filter will fit seamlessly without any compatibility issues. This ease of use is a significant advantage for those of us who want to avoid the stress of searching for the right part while managing our boating adventures.

What I truly appreciate about this oil filter is the assurance that comes with using a genuine OEM product. I know that I am investing in a component that has been designed and tested to meet the demanding conditions of marine environments. The Mercruiser Oil Filter will help to keep my engine running smoothly, minimizing the risk of wear and tear. As someone who enjoys spending time on the water, the last thing I want is to deal with engine troubles because of subpar maintenance products.

if you are a boat owner looking for a reliable and high-quality oil filter, I wholeheartedly recommend the MERCURY Marine Mercruiser Oil Filter. Its OEM certification, extensive compatibility, and ease of use make it an excellent choice for maintaining your Mercruiser engine. By choosing this filter, you can ensure the longevity and performance of your boat, allowing you to focus on what truly matters—enjoying your time out on the water. Don’t hesitate to make this investment; your engine will thank you for it.

Feature	Description
OEM Certification	Genuine factory original equipment Mercruiser Oil Filter PN 866340K01
Compatibility	Fits all Mercruiser sterndrive and inboard GM engines except 4.3L V6 without remote oil filter
Engine Types Supported	GM 3.0L, 4.3L V6 with remote oil filter, 5.0L 305, 5.7L 350, and more
Replacement for Other Parts	Replaces Mercury 35-866340Q03 and Sierra 18-7824-1

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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

As someone who has spent considerable time in the marine environment, I know how crucial it is to maintain the performance and longevity of your boat’s engine. That’s why I’m excited to share my thoughts on the ‘2 Pcs Marine Oil Filter 35-866340K01’, which is compatible with Mercruiser 4- & 6- Cylinder Engines and GM V8 Engines. This product has quickly become a staple in my maintenance routine, and I believe it can do the same for you.

First and foremost, the fact that these oil filters are brand new aftermarket replacements means that they are designed to fit seamlessly into your existing setup. The direct replacement feature eliminates the hassle of compatibility issues that often plague boat owners when searching for maintenance parts. I truly appreciate how easy it is to swap these filters in, allowing me to focus on enjoying time on the water rather than worrying about engine upkeep.

One of the standout features of these oil filters is their short size and durable construction. I have found that this design not only enhances the filter’s holding capacity for contaminants but also extends its life significantly. In my experience, having a filter that can withstand the unique challenges posed by marine environments—such as saltwater and varying temperatures—has proven invaluable. I can spend more time boating and less time worrying about whether my filter can handle the load.

The construction quality is another aspect that deserves praise. Made specifically for marine applications, these filters are crafted from the highest quality materials. This attention to detail reassures me that I’m investing in a product that is built to last. Whether I am navigating through choppy waters or cruising at a steady pace, I can trust that my engine is protected by a reliable filter.

Compatibility is another significant advantage of this oil filter. It fits all MCM/MIE GM engines, except for those V-6 models that have the oil filter mounted directly on the engine block. This means that whether you own a Mercruiser In-Line 4- or 6-Cylinder Engine, or a GM V8 Engine, you can be confident that this filter will serve your needs effectively. Moreover, it also fits various Mercury engine models, including the 4.5L and 6.2L, providing a versatile solution for many boat owners.

To summarize the key features of the ‘2 Pcs Marine Oil Filter 35-866340K01’, I have compiled a quick reference table below

Feature	Description
Type	Aftermarket Oil Filter
Compatibility	Mercruiser 4- & 6-Cylinder Engines, GM V8 Engines, Remote Oil Filter Models
Durability	High-quality materials for marine applications
Contaminant Holding Capacity	Longer filter life due to durable construction
Size	Short Size for Easy Installation

if you’re in the market for a reliable, efficient, and high-quality oil filter that can withstand the demands of marine environments, I wholeheartedly recommend the ‘2 Pcs Marine Oil Filter 35-866340K01’. Its compatibility with a wide range of engines, combined with its durable construction, makes it an excellent choice for any boat owner looking to ensure their engine runs smoothly and efficiently. Don’t wait until your next maintenance is due—consider adding these oil filters to your toolkit today and experience the peace of mind that comes with quality marine engine care.

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4. Quicksilver by Mercury Marine 866340Q03 Oil Filter, MerCruiser Sterndrive and Inboard Engines (Pack of 2)

As a boat enthusiast and someone who values the longevity of my marine engine, I recently came across the Quicksilver by Mercury Marine 866340Q03 Oil Filter, specifically designed for MerCruiser sterndrive and inboard engines. This product caught my attention because it offers a pack of two oil filters, which is not only economical but also incredibly convenient for regular maintenance. When it comes to maintaining the performance of my boat, I want to ensure that I’m using high-quality parts, and this oil filter certainly fits the bill.

One of the standout features of this oil filter is its direct replacement capability for the Mercury Marine 866340K01. This means that I can easily swap out the old filter with this new one without worrying about compatibility issues. This straightforward installation process is a huge plus for someone like me who prefers to handle maintenance tasks personally. I appreciate a product that streamlines the upkeep of my engine, making it easier and more efficient.

Additionally, the superior M-Pleated cleansing filter media is designed to effectively remove oil contaminants. This feature is critical because contaminants can lead to severe engine damage over time. Knowing that I have a filter that prioritizes the health of my engine gives me peace of mind. It’s essential to protect my investment, and this oil filter helps me do just that by ensuring that my engine runs smoothly and efficiently.

Another impressive aspect of the Quicksilver oil filter is its anti-drain back valve. This feature ensures that there is proper lubrication upon startup, which eliminates the risk of dry starts. Dry starts can be detrimental to an engine’s health, leading to long-term wear and tear. By using this oil filter, I can rest assured that my engine will be well-lubricated from the moment I turn the key, promoting a longer lifespan for my MerCruiser engine.

Moreover, this oil filter is produced to meet Mercury Marine’s original equipment manufacturer (OEM) specifications. This means that it is built to the same high standards that the engine was designed for, ensuring maximum protection and performance. For someone who values quality and reliability, this is a significant advantage. I want products that I can trust, and knowing that this filter is OEM certified gives me confidence in my choice.

In summary, the Quicksilver by Mercury Marine 866340Q03 Oil Filter is an excellent investment for anyone who owns a MerCruiser high-performance sterndrive or inboard engine. Its superior filtration, easy installation, anti-drain back valve, and adherence to OEM specifications make it a top choice in the market. If you’re looking for a reliable oil filter that can help extend the life of your engine and ensure optimal performance, I highly recommend considering this product. It’s a small investment for the peace of mind and engine protection it provides.

Feature	Description
Pack of 2	Convenient and economical option for maintenance
Direct Replacement	Compatible with Mercury Marine 866340K01, easy installation
M-Pleated Filter Media	Removes oil contaminants to protect engine health
Anti-Drain Back Valve	Ensures lubrication at startup, eliminates dry starts
OEM Specifications	Produced to meet high standards for optimal performance

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Why the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 is Essential for My Boat

As an avid boater, I understand the importance of keeping my engine in top shape, and that’s why I rely on the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01. This oil filter is specifically designed for my Mercruiser engine, ensuring a perfect fit and optimal performance. By using these filters, I can trust that they will effectively remove contaminants and debris from my engine oil, which is crucial for maintaining engine longevity and efficiency.

I also appreciate the convenience of the 2-pack. Having a spare filter on hand means I can perform routine maintenance without delay. It gives me peace of mind knowing that I can easily replace the filter when it’s time for an oil change, ensuring that my engine runs smoothly and reliably every time I hit the water. This proactive approach not only saves me money on potential repairs but also enhances my overall boating experience.

In my experience, using high-quality filters like the 35-866340K01 has made a noticeable difference in my boat’s performance. I’ve noticed improved oil circulation and engine responsiveness, which makes every outing more enjoyable.

Buying Guide for 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01

Understanding the Importance of Oil Filters

When I first started maintaining my boat, I quickly realized the critical role oil filters play in keeping the engine running smoothly. The oil filter removes contaminants from the engine oil, ensuring that my engine remains clean and well-lubricated. A quality oil filter like the 35-866340K01 is essential for optimal engine performance.

Compatibility with My Mercruiser Engine

Before purchasing, I always check compatibility with my specific Mercruiser engine model. The 35-866340K01 is designed for various Mercruiser models, and it’s important for me to ensure it fits my engine to avoid any performance issues. I recommend looking up my engine specifications and confirming that this filter is suitable.

Quality and Durability

I’ve learned that quality matters when it comes to oil filters. The 2-Pack Mercury Marine Mercruiser Oil Filter is known for its durability and effectiveness in filtering oil. I pay attention to the materials used in the construction, as this impacts the filter’s longevity and performance. A robust oil filter can save me from costly repairs in the long run.

Ease of Installation

When I change my oil filters, I prefer products that are easy to install. The 35-866340K01 typically features a design that simplifies the installation process. I always appreciate clear instructions and a user-friendly design, which make my maintenance routine much more manageable.

Cost-Effectiveness of Buying in Packs

Buying a 2-pack of oil filters, like the 35-866340K01, has proven to be a cost-effective choice for me. Having a spare filter on hand means I can perform regular maintenance without additional trips to the store. I often consider the overall value when making my purchase, and a pack can provide savings over buying individual filters.

Customer Reviews and Ratings

Before making a purchase, I always take the time to read customer reviews and ratings. This helps me gauge the experiences of other boat owners with the 35-866340K01 filter. Feedback on performance, ease of installation, and overall satisfaction gives me confidence in my buying decision.

Frequency of Oil Changes

In my experience, knowing how often to change my oil filter is crucial. Depending on my usage and conditions, I typically change my oil and filter every 100 hours of operation or at least once a season. The 2-pack ensures I have a backup ready for my next maintenance session.

Conclusion

Overall, I find that the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 is a practical choice for anyone looking to maintain their Mercruiser engine. By considering compatibility, quality, installation ease, and customer feedback, I can make an informed decision that keeps my engine in top condition.

Author Profile

Mike Nielsen

Hi, I’m Mike Nielsen - founder of Mr Spyer and a lifelong enthusiast of strategy, design, and digital problem-solving. Over the years, I’ve worn many hats in the tech space. The name “Mr. Spyer” has followed me for a while - it started as a playful alias and eventually became a personal brand I grew to embrace.

In 2025, I decided to pivot. Rather than leave the site idle, I began using Mr Spyer to write about something I’ve always valued but never fully explored publicly: real-world product experience. Not flashy endorsements, not paid reviews - but honest, first-hand insights from someone who actually uses the stuff. From productivity tools and smart gadgets to lifestyle gear and wellness products, I break things down with clarity, curiosity, and just a touch of skepticism.

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