Mercury MerCruiser Quicksilver Fuel Filter 879885K
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Mercury MerCruiser / Quicksilver Fuel Filter – 879885K
Maintain clean fuel delivery and protect your engine with the genuine Mercury Marine / Quicksilver 879885K Inline Fuel Filter. This OEM under-cowl inline filter removes debris, moisture, and contaminants from gasoline before the fuel reaches the engine’s EFI system, helping maintain smooth performance and preventing injector or fuel-pump damage.
Designed specifically for modern Mercury FourStroke fuel systems, this filter is easy to access for routine maintenance and replacement.
Key Features
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Genuine Mercury / Quicksilver OEM inline fuel filter
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Removes fuel contaminants and moisture before reaching the engine
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Protects fuel injectors, pumps, and EFI components
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Under-cowl inline design for quick service and replacement
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Built to Mercury Marine OEM filtration and flow specifications
Part Details
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OEM Part Number: 879885K
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Also referenced as 35-879885K in Mercury parts catalogs
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Fuel Line Size: approx. 8 mm / 5⁄16-inch inline connection
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Product Type: Inline gasoline fuel filter
Compatible Mercury Engines
Commonly used on Mercury FourStroke outboard engines, including:
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30–40 HP EFI FourStroke (3-cylinder)
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40–60 HP EFI FourStroke (996 cc)
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75–115 HP EFI FourStroke (1.7L and 2.1L)
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150 HP EFI FourStroke
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135–300 HP Verado outboards (L4 and L6)
Exact fitment depends on engine model and serial number range.
Function
The filter is installed in the fuel line under the engine cowl, capturing particles and water before the fuel reaches the high-pressure EFI system. Clean fuel improves engine reliability, prevents injector clogging, and helps maintain optimal engine performance.
Important Compatibility Note
Fuel filters vary depending on engine model, fuel system configuration, and serial number range. Always verify compatibility using the engine serial number or existing filter part number before ordering.
Shipping: Ships same or next day for fast Canada wide shipping.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.