Mercury Quicksilver Fuel Filter Assembly 879884T – 20 Micron | EFI FourStroke 30–60 HP
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Mercury Quicksilver Fuel Filter Assembly 879884T – 20 Micron
Part Number: 879884T | Also Referenced As: 35-879884T | Brand: Mercury / Quicksilver | GTIN: 745061479302
Genuine Mercury Marine under-cowl cartridge-type fuel filter assembly for selected Mercury and Mariner EFI FourStroke outboards from 30 to 60 HP. The assembly includes a 20-micron filter element pre-installed in a translucent screw-on bowl, allowing visual inspection of fuel condition and debris accumulation during routine checks. This is the complete filter assembly — not just the replaceable element.
Features
- 20-micron filtration — removes fuel-borne contaminants before they reach the engine
- Complete assembly: translucent screw-on bowl with filter element included
- Translucent housing for visual fuel condition and debris inspection
- Under-cowl cartridge-type design — genuine OEM Mercury configuration
- Genuine Mercury Marine OEM replacement component
Compatible Applications
- Mercury 30 HP EFI FourStroke – 3-cylinder (Serial No. 0T409000 and above)
- Mercury / Mariner 40 HP EFI FourStroke – 3-cylinder (Serial No. 0T409000 and above)
- Mercury / Mariner 40 HP EFI FourStroke – 4-cylinder (Serial No. 0T409000 and above)
- Mercury / Mariner 50 HP EFI FourStroke – 4-cylinder (Serial No. 0T409000 and above)
- Mercury / Mariner 60 HP EFI FourStroke – 4-cylinder (Serial No. 0T409000 and above)
Confirm engine horsepower, cylinder configuration, and serial number before ordering. This assembly is specifically for engines equipped with the under-cowl screw-on filter bowl configuration. Verify fitment via engine serial number and the applicable Mercury parts diagram.
Service Interval
Replace as part of scheduled engine maintenance or when contamination or fuel-flow restriction is suspected. The translucent bowl allows fuel condition and debris to be visually checked during routine inspection — replace sooner if significant debris is visible.
Installation Notes
Shut off or isolate the fuel supply before beginning. Carefully remove the existing assembly, inspect surrounding fuel connections and seals, and install the replacement per the Mercury service procedure. Prime the fuel system and inspect thoroughly for leaks before returning the engine to service.
Cross-Reference Part Numbers
- Mercury / Quicksilver: 879884T / 35-879884T
- Sierra: 18-79965
- GTIN: 745061479302
Related Products
- Mercury Fuel Filter Kit – 40/50/60 HP EFI FourStroke 8M0149607
- Mercury Quicksilver Under-Cowl Fuel Filter Kit 35-87946Q04 – 6–60 HP
- Mercury Quicksilver Inline Fuel Filter 879885K – EFI FourStroke & Verado
- Mercury Quicksilver Inline Fuel Filter 879885Q – 20 Micron Translucent
- Mercury Outboard Water Separating Fuel Filter Kit 18458Q4
Parts Desk Insights
The key thing to confirm when ordering 879884T is that your engine uses the under-cowl screw-on cartridge bowl — this is the complete assembly, not just a replacement element. Best used as a planned OEM replacement during scheduled maintenance on 30–60 HP Mercury/Mariner EFI FourStroke outboards at serial 0T409000 and above. The most common customer issue is confusing this complete assembly with other Mercury fuel filter formats — always verify by engine serial number and the parts diagram to confirm the bowl-style filter applies to your specific engine.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 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.