Mercury MerCruiser Quicksilver Fuel Filter 805406
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Mercury MerCruiser / Quicksilver Fuel Filter – 805406
Maintain clean fuel delivery and protect critical engine components with the genuine Mercury Marine / Quicksilver 805406 Fuel Filter. This OEM filter is commonly installed in the fuel pressure regulator or fuel cooler assembly on many MerCruiser EFI engines, where it removes contaminants from gasoline before the fuel reaches the injectors.
Designed to Mercury Marine’s original equipment specifications, the filter ensures consistent fuel flow and helps prevent damage to sensitive EFI fuel system components such as injectors and regulators.
Key Features
-
Genuine Mercury / Quicksilver OEM fuel filter
-
Designed for fuel pump / fuel cooler regulator systems
-
Helps remove fuel contaminants and debris
-
Protects fuel injectors and EFI fuel system components
-
Compact direct replacement filter element for MerCruiser engines
Superseded / Updated Part
-
805406 → superseded by 8M0204683 (current replacement part).
Compatible Mercury MerCruiser Engines
Commonly used on MerCruiser EFI and MPI sterndrive or inboard engines, including:
-
4.3L V6 EFI engines
-
5.0L and 5.7L MPI engines
-
6.2L MPI engines
-
7.4L / 454 EFI engines
-
8.1L / 502 MPI engines
-
High-performance models such as 500 EFI, 525 EFI, and 575 SCi depending on serial number range.
Function
This small inline filter is installed within the fuel pump and cooler system, where it captures fine particles before fuel enters the high-pressure EFI system, helping maintain engine performance and preventing fuel system damage.
Important Compatibility Note
Fuel system components vary by engine model, fuel cooler configuration, and serial number range. Always verify compatibility using the engine serial number before ordering to ensure the correct replacement filter.
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.