Description

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.

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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

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Superseded / Updated Part

• 805406 → superseded by 8M0204683 (current replacement part).

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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.

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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.

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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.