Most boat owners treat fuel filters as an afterthought, often waiting for a stall before checking them. I have spent significant time comparing these units based on technical specifications and common feedback. Choosing the wrong filtration media can starve your engine of necessary flow. I suggest you prioritize OEM standards to protect your investment. Let us look at how these six options stack up against each other.
1. Fuel Filter and Filtering Disk Set 35-8M0093688 866171A1 8M0093688 35-892665 for Marine for Mercruiser Engine with Gen III 3 Fuel Cooler
This set earns its ranking because it offers a straightforward, all-in-one solution for the standard Gen III fuel system. It covers the basics for owners who perform regular engine service without needing specialized components.
In my view, this is a solid choice for those who value simplicity and want to ensure their fuel cooling system remains free of debris. It avoids unnecessary complexity while meeting the foundational requirements for your engine.
Buyers appreciate the convenience of the included filtering disk.
The kit is reported to fit as expected in standard maintenance cycles.
Some users note that the O-ring seals require careful attention during installation.
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2. Quicksilver 802893Q01 Water Separating Fuel Filter, Mercury & MerCruiser
This filter is best for the boater who prioritizes water separation above all else to combat moisture in the tank. If you operate in humid climates or keep your boat in storage for long periods, this unit provides the necessary defense.
I believe the internal construction here is superior for trapping small droplets before they reach your fuel pump. It acts like a sentinel standing guard between your fuel tank and your engine.
Users frequently report consistent performance in removing moisture.
The build quality is often praised as being robust compared to generic alternatives.
It is widely considered a reliable standard for seasonal maintenance.
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3. Quicksilver 8M0093688 Water Separating Fuel Filter for MerCruiser Engines with Gen III Fuel Cooler
The most interesting feature here is the specific micron rating designed exactly for the flow requirements of the 350 Mag MPI. While it looks like a standard canister, the internal media is precisely calibrated for high-performance marine engines.
This is my top pick because it guarantees original equipment compatibility. You avoid the risk of pressure drops that can plague inferior aftermarket designs.
Many boaters find this filter provides the most consistent engine idle.
It is the preferred choice for those who stick strictly to manufacturer guidelines.
The fitment is consistently described as perfect for Gen III cooler housings.
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4. EATAKWARD Fuel Filter and Filtering Disk Set 35-8M0093688 866171A1 8M0093688 35-892665 Compatible with Mercury Marine Mercruiser Engines with Gen III 3 Fuel Cooler, 2 Psc
The most common complaint regarding this set involves the finish of the housing, which can appear less refined than premium alternatives. However, for the budget conscious buyer, it offers an acceptable level of performance for short-interval service.
I think it serves a purpose for those who prefer to change their filters more frequently due to dirty fuel conditions. You get what you pay for, but it remains a functional option for light use.
The price point is often cited as the primary reason for choosing this set.
Some users suggest checking the threads for debris before installing.
It serves as a decent backup filter for emergency situations.
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5. Fuel Filter and Filtering Disk Set 35-8M0093688 866171A1 8M0093688 35-892665 for Marine for Mercruiser Engines with Gen III 3 Fuel Cooler, 2 Pcs
When comparing this to the previous budget option, the primary difference lies in the packaging reliability and consistency of the included disks. This set is designed for the owner who performs multiple services per season or maintains a small fleet.
I find this bulk approach sensible for high-use engines. It provides the necessary hardware to keep your fuel system clean without the high cost of individual premium units.
The multi-pack format is frequently highlighted as a great value.
Buyers note that the filtering disks are comparable to higher-priced versions.
The storage box is often mentioned as helpful for keeping spares organized.
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6. M16 35-864572T Fuel Filter Fit for Mercruiser 4.3 5.7 350 383 496 8.1L V8 GM Fuel Filter Mercruiser Pump Replace 18-7721 35-864572T 35-864572T01 35-864572 9-37826
This filter became popular because of its wide compatibility with older V8 engines that lack the specific Gen III cooling requirements. It has a reputation for being a workhorse that fits a vast range of legacy marine setups.
While it is a popular staple, I suspect it may lack the specific flow characteristics required by modern MPI fuel systems. Use this primarily if your engine is an older design that does not demand the latest filtration technology.
Long-term owners often mention this as a reliable standby for vintage boats.
The heavy-duty exterior casing is frequently mentioned in positive feedback.
It is noted for being readily available at most marine supply locations.
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Choosing Between Them
My top recommendation for most owners is the Quicksilver 8M0093688, as it offers the most reliable OEM fitment for the 350 Mag MPI. If you prioritize budget, the EATAKWARD set works for light use, while the Quicksilver 802893Q01 remains the gold standard for water separation. I encourage you to choose based on your specific engine age and usage patterns rather than just price alone.
Keep in mind that marine environments are notoriously harsh on fuel systems. Regardless of the brand you select, regular replacement is the only way to avoid costly engine damage caused by contaminants or water intrusion. Treat your fuel filter as the primary line of defense, and your engine will likely reward you with much better reliability.
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Author Profile
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I’m James Wilson, and I’ve always been the kind of person who likes to know if something actually lives up to the promises on the box. Growing up, I was constantly taking things apart, fixing them, and comparing one product to another. That curiosity eventually turned into a career of testing, researching, and reviewing products with one simple goal: helping people spend their money wisely.
Over the years, I’ve tested everything from electric bikes and outdoor gear to home gadgets, power tools, and everyday essentials. I don’t believe in hype or paid opinions—only honest, hands-on experience. That’s why I created ElectricBikestoBuy.com. While electric bikes are still one of my biggest passions, this site has grown into a place where I share unbiased reviews and practical buying guides across a wide range of products. Every recommendation is based on real testing, careful research, and the same question I ask myself before every review: “Would I spend my own money on this?” If my work helps you make a better purchase and avoid costly mistakes, then I’ve done exactly what I set out to do.
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