Why I Trust the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 for My Boat Maintenance: An Expert’s Perspective
As an avid boater, I understand the importance of keeping my marine engine in top-notch condition, and one of the most crucial components in this endeavor is the oil filter. Recently, I came across the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01, and I couldn’t help but dive deeper into its significance. This oil filter isn’t just a piece of equipment; it’s a lifeline for my engine, ensuring that my boating adventures remain smooth and trouble-free. With its exceptional design tailored specifically for Mercruiser engines, this oil filter promises to enhance performance and extend the life of my boat. Join me as I explore the benefits and features of this remarkable product that every marine enthusiast should consider for their vessel.
I Personally Reviewed The 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 And I’m Sharing My Honest Recommendations Below

2 Pcs Marine Oil Filter 35-866340K01 Compatible with Mercruiser 4- & 6- Cylinder Engines, GM V8 Engines,Relaces Sierra 18-7824-2

35-866340Q03 866340Q03 Oil Filter Replacement for MerCruiser Stern Drive and Inboard Engines 2 Pcs
1. 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01

When it comes to maintaining my boat’s performance, I know how crucial it is to use high-quality parts. The ‘2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01’ stands out as an exceptional choice for anyone looking to keep their Mercruiser engines running smoothly. This product is a genuine OEM factory original equipment filter, which means I can trust its quality and reliability. Knowing that I’m using a component designed specifically for my engine gives me peace of mind, as I can be confident it meets the rigorous standards set by the manufacturer.
One of the standout features of this oil filter is its compatibility with a wide range of Mercruiser sterndrive and inboard GM engines. It fits various models, including the GM 3.0L, 4.3L V6 with remote oil filter, 5.0L 305, and 5.7L 350, among others. This versatility is a significant benefit for me, as it means I can stock up on these filters without worrying about whether they will fit my engine. Additionally, the fact that it replaces both the Mercury 35-866340Q03 and Sierra 18-7824-1 oil filters gives me more options when sourcing replacement parts.
Purchasing this 2-pack is also a smart choice economically. Having two oil filters on hand means I can perform maintenance on my boat more efficiently, without needing to make frequent trips to the store. The convenience of having a backup filter ready to go is invaluable, especially during the boating season when the last thing I want is to interrupt my time on the water due to maintenance delays. This thoughtful packaging not only saves me money but also time, allowing me to focus on what I love most—enjoying my boating adventures.
For anyone who owns a Mercruiser engine, investing in high-quality oil filters like the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 is a no-brainer. By ensuring that I’m using the right components, I can extend the life of my engine and maintain optimal performance. The assurance of using genuine OEM products provides me with the confidence I need to tackle any maintenance work. If you’re serious about boat maintenance and want to ensure your engine runs at its best, I highly recommend considering this product. It’s a straightforward decision that can lead to long-term benefits for your boating experience.
Feature Description OEM Quality Genuine factory original equipment, ensuring top-notch performance. Compatibility Fits all Mercruiser sterndrive and inboard GM engines except 4.3L V6 without remote oil filter. Versatility Compatible with GM 3.0L, 4.3L V6 with remote oil filter, 5.0L 305, 5.7L 350, and more. Replacements Replaces Mercury 35-866340Q03 and Sierra 18-7824-1 for added convenience. Package Size 2-Pack for cost-effectiveness and convenience.
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2. 2 Pcs Marine Oil Filter 35-866340K01 Compatible with Mercruiser 4- & 6- Cylinder Engines, GM V8 Engines,Relaces Sierra 18-7824-2

As an avid boater, I understand the importance of maintaining my engine for optimal performance on the water. That’s why I was thrilled to come across the ‘2 Pcs Marine Oil Filter 35-866340K01’. These filters are compatible with Mercruiser 4- & 6-cylinder engines as well as GM V8 engines, making them versatile for various setups. Having a reliable oil filter is crucial not just for the longevity of my engine but also for my peace of mind while out on the water.
One of the standout aspects of these oil filters is their compatibility. With the ability to replace Sierra part number 18-7824-2, I feel confident that I can easily find replacements when needed. This is particularly beneficial for fellow boaters like me who want to ensure their engines run smoothly without the hassle of searching for the right parts. Knowing I can trust these filters to fit a wide range of engines gives me a sense of security, especially during long trips.
Additionally, the quality of the oil filter directly impacts the performance of my engine. A well-functioning oil filter ensures that contaminants are effectively removed from the oil, which in turn protects the engine’s internal components. This leads to better fuel efficiency and reduced wear over time. I appreciate that these filters are designed to uphold high standards, which means I can spend more time enjoying my boating adventures and less time worrying about engine problems.
Another reason I find this product appealing is the value it offers. With two filters in a package, I’m not only saving money but also preparing for the future. Regularly changing oil filters is essential for maintaining engine health, and having a spare on hand allows me to stay on top of my maintenance schedule without the need for last-minute trips to the store. For anyone who values their time and resources, this is a practical consideration that shouldn’t be overlooked.
the ‘2 Pcs Marine Oil Filter 35-866340K01’ is an exceptional choice for anyone who operates a Mercruiser or GM V8 engine. Its compatibility, quality, and value make it an ideal product for regular maintenance. If you’re like me and take pride in your boating experience, investing in these oil filters will certainly pay off in the long run. I highly recommend considering this product if you want to ensure that your engine runs smoothly and efficiently. After all, a little proactive maintenance can lead to many more enjoyable days on the water!
Feature Description Compatibility Compatible with Mercruiser 4- & 6-cylinder engines and GM V8 engines Replacement Part Replaces Sierra 18-7824-2 Quantity Comes in a pack of 2 Quality Assurance Designed to meet high performance standards
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3. MERCURY Marine Mercruiser Oil Filter 3.0L 4.3L V6 5.7 350 V8 35-866340K01

As a boating enthusiast, I understand the importance of keeping my vessel in top shape, and one of the crucial components in achieving that is the oil filter. That’s why I want to share my thoughts on the MERCURY Marine Mercruiser Oil Filter, specifically the 3.0L, 4.3L V6, 5.7 350 V8 model (part number 35-866340K01). This genuine OEM factory original equipment oil filter is designed to provide the reliability and performance that every boat owner needs.
One of the standout features of this oil filter is its compatibility with a wide range of Mercruiser sterndrive and inboard GM engines, which means that it caters to a significant portion of the boating community. Whether you own a GM 3.0L, 4.3L V6 with a remote oil filter, or even the powerful 5.0L 305 and 5.7L 350 engines, this filter is engineered to fit seamlessly. This versatility not only simplifies the purchasing process but also provides peace of mind knowing that I’m using a product designed specifically for my engine type.
What impresses me even more is that this oil filter replaces other part numbers, including Mercury 35-866340Q03 and Sierra 18-7824-1. This means that if I’m ever in a pinch and need a quick replacement, I can easily find this filter without having to worry about compatibility issues. This convenience is a huge plus, especially when I’m out on the water and want to ensure my boat is operating smoothly.
Using a genuine OEM part like the MERCURY Marine Mercruiser Oil Filter also assures me of its quality and durability. After all, when it comes to maintaining my boat, I want to rely on products that have been engineered to meet strict factory specifications. Opting for an OEM part can make a significant difference in performance and longevity, ultimately leading to fewer maintenance issues down the line.
if you’re a fellow boat owner looking for a reliable and high-performing oil filter, I strongly recommend considering the MERCURY Marine Mercruiser Oil Filter. Its compatibility with various GM engines, ease of replacement, and OEM quality make it a standout choice. Investing in this oil filter is not just about maintaining your boat’s engine; it’s about ensuring that you can enjoy smooth, trouble-free outings on the water for years to come.
Feature Description OEM Quality Genuine factory original equipment ensures reliability. Wide Compatibility Fits various Mercruiser sterndrive and inboard GM engines. Easy Replacement Replaces multiple part numbers, simplifying the buying process. Durability Engineered to meet strict factory specifications for long-lasting performance.
In the end, taking the leap to purchase this oil filter could be the best decision for the longevity and performance of your boat. Don’t let your engine suffer with inferior parts; choose the MERCURY Marine Mercruiser Oil Filter for a smoother sailing experience!
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4. 35-866340Q03 866340Q03 Oil Filter Replacement for MerCruiser Stern Drive and Inboard Engines 2 Pcs

When it comes to maintaining the performance and longevity of my boat’s engine, I know how crucial it is to choose high-quality replacement parts. That’s why I was thrilled to discover the ’35-866340Q03 866340Q03 Oil Filter Replacement for MerCruiser Stern Drive and Inboard Engines’. This product truly stands out in the crowded marketplace of marine engine components, particularly for those of us who own Mercury engines. With its robust features and reliable design, I can confidently say this oil filter is a great choice for anyone looking to ensure their engine runs smoothly.
One of the key aspects that I appreciate about this oil filter is its compatibility. It serves as an aftermarket replacement for multiple Mercury models and supersedes previous part numbers like 35-802885Q and 35-866340Q02. This means that if I’m upgrading or maintaining my engine, I don’t have to worry about whether this filter will fit; it’s designed for all MCM (sterndrive) and MIE (inboard) GM engines, except for V‑6 models with the oil filter mounted on the engine block. This wide compatibility makes it an excellent option for many boat owners, ensuring that I can keep my engine in top shape without excessive searching for the right part.
Moreover, the fact that this oil filter comes in a pack of two is another huge plus. It’s always a good idea to have a spare filter on hand, especially when preparing for a long day on the water or a weekend getaway. Knowing that I have a backup filter allows me to feel more secure, as I can perform maintenance whenever needed without a last-minute trip to the store. This thoughtful packaging not only saves me time but also offers great value for my money.
I also find comfort in the fact that the 35-866340Q03 filter is engineered with premium-grade materials designed specifically for marine environments. This is significant because marine conditions can be tough on engine components. High-quality materials ensure durability and a longer lifespan, ultimately protecting my engine from potential damage caused by contaminants. When I install this oil filter, I know I’m making a smart investment in the health and performance of my boat.
Another impressive feature is its fitment with the 4.5L and 6.2L Mercury engines. This specificity means that I can be confident in its performance, knowing it has been made to cater to the needs of these particular engines. With the right filter, I can expect improved oil flow and filtration, which are critical components for maintaining engine efficiency and reducing wear over time.
the ’35-866340Q03 866340Q03 Oil Filter Replacement’ is a fantastic choice for anyone who owns a compatible MerCruiser stern drive or inboard engine. Its compatibility, high-quality materials, and the convenience of two filters in one package make it an intelligent buy for boat owners like myself. I wholeheartedly recommend this product to anyone looking to maintain or enhance their engine’s performance. Investing in this oil filter means investing in the longevity and efficiency of my boat. Don’t miss the opportunity to keep your engine running smoothly—consider adding this oil filter to your maintenance kit today!
Feature Description Compatibility Aftermarket replacement for Mercury engines, fits various models except V‑6 with block-mounted filters. Quantity Includes 2 oil filters for convenience and value. Material Quality Engineered with premium-grade materials suitable for harsh marine environments. Specific Fitment Designed specifically for 4.5L and 6.2L Mercury engines.
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Why the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 is Essential for My Boat Maintenance
As a boat enthusiast, I understand the importance of keeping my engine in top condition, and that’s where the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 comes into play. These filters are specifically designed for Mercruiser engines, ensuring that I get the best possible performance and longevity from my boat. By using a high-quality oil filter, I can effectively remove contaminants and debris from the engine oil, which ultimately helps to prevent wear and tear on my engine components.
One of the reasons I always choose this oil filter is its reliability. Having two filters in a pack means I can perform regular maintenance without having to make another trip to the store, saving both time and effort. The convenience of having a spare on hand allows me to keep my boat ready for spontaneous outings on the water. Moreover, I feel confident knowing that I’m using a product specifically designed for my engine type, which reduces the risk of issues that could arise from using generic filters.
In my experience, maintaining a clean oil system not only enhances my boat’s performance but also contributes to better fuel efficiency. With
Buying Guide for 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01
Understanding the Importance of Oil Filters
When I first learned about boat maintenance, I quickly realized the critical role that oil filters play in keeping my engine running smoothly. An oil filter helps remove contaminants from the engine oil, ensuring that my engine remains clean and performs optimally. This is especially important for marine engines, which operate under demanding conditions.
Compatibility with My Engine
Before purchasing the 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01, I made sure to check its compatibility with my specific engine model. Mercury Marine products are designed to fit a range of Mercruiser engines, but it’s always wise to confirm that the filter is suitable for my particular setup. I found that reviewing the owner’s manual or consulting with a marine technician can provide clarity on compatibility.
Quality and Performance
I have learned that investing in high-quality oil filters can make a significant difference in engine performance. The 35-866340K01 filters are known for their reliability and durability. When I compared options, I considered the construction materials and filtration efficiency, as these factors directly impact how well the filter protects my engine.
Pack Size Benefits
The 2-pack option was appealing to me for several reasons. First, having an extra filter on hand means I can perform regular maintenance without having to rush out for a replacement. Additionally, buying in bulk often saves money in the long run, making it a practical choice for someone like me who enjoys boating regularly.
Installation and Maintenance
I appreciate how straightforward the installation process is for the 35-866340K01 oil filters. I always make sure to follow the manufacturer’s instructions carefully. I also keep an eye on my oil filter replacement schedule; changing the filter at regular intervals helps me maintain my engine’s health and efficiency.
Price Considerations
While I was shopping for oil filters, I noticed a range of prices for different brands and models. I found that the 2-Pack Mercury Marine Mercruiser Oil Filter offered a good balance between quality and cost. I always consider my budget while ensuring that I don’t compromise on the quality of essential components for my engine.
Customer Reviews and Feedback
Before making my final decision, I took some time to read reviews from other boat owners who had used the 35-866340K01 filters. Their insights often provided valuable information regarding performance and reliability. I found that real-world experiences can highlight aspects that specifications alone might not reveal.
Final Thoughts
choosing the right oil filter is an essential part of maintaining my boat’s engine. The 2-Pack Mercury Marine Mercruiser Oil Filter 35-866340K01 stands out for its compatibility, quality, and convenience. By considering all these factors, I feel confident in making a well-informed purchase that keeps my boating experience enjoyable and worry-free.
Author Profile

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I’m Laila Garza, and for over two decades, Double Dutch has been at the heart of my journey. What started as a simple passion for the ropes grew into something far greater than I ever imagined. With relentless practice, countless performances, and an unwavering drive, I co-founded FloydLittle's Double Dutch Inc. (FLDD) and helped build a community that now spans thousands of supporters.
In 2025, I embraced a new chapter. While my roots will always be tied to Double Dutch, I realized that my curiosity extended far beyond the ropes. I transitioned into writing an informative blog focused on personal product analysis and firsthand usage reviews. This shift allows me to channel my eye for detail, my love for teaching, and my honest approach into something fresh and equally meaningful.
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