Sierra 18-7967 Fuel Water Separator Filter, Replaces Mercury 35-18458Q3, V6 EFI 1995 and Earlier with Sensor

The Sierra 18-7967 is a 10 micron fuel water separator filter built for Mercury V6 EFI outboards from 1995 and earlier, and includes a built-in water sensor to alert you to water contamination before it reaches your fuel injection system. The filter removes over 99.8% of emulsified water from gasoline and is over 90% efficient at capturing particles as small as 10 microns, while flowing up to 90 gallons per hour so it keeps up with demanding V6 EFI fuel delivery. Protecting sensitive inboard, sterndrive, and outboard fuel injection components from water and debris contamination is critical on EFI engines, where even small amounts of water or particulate can cause misfires, injector damage, or corrosion. The 18-7967 housing is black, which distinguishes it from the visually similar 18-7968 used on 1996-and-up V6 EFI Mercury engines, so it is important to confirm you are ordering the correct sensor color and part number for your engine's production year. This filter is a direct replacement for several Mercury Marine OEM fuel/water separator part numbers, letting you cross-reference your old filter and order the equivalent Sierra part with confidence. As with all Sierra parts, it is engineered to meet or exceed the performance of the original equipment part it replaces and is built to hold up in the marine environment.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-7967
• Micron Rating: 10 Micron
• Flow Rate: 90 Gallons Per Hour (GPH)
• Water Removal Efficiency: Removes over 99.8% of emulsified water from gasoline
• Particle Filtration Efficiency: Over 90% efficient at removing particles as small as 10 microns
• Fitment: Mercury V6 EFI, 1995 and Earlier, with Sensor
• Color: Black
• Outer Material: Plastic
• Weight: 1.03 pounds
• UPC: 808282175672

Fitment

• Mercury V6 EFI, 1995 and Earlier, with Sensor (Black)

Replaces (OEM)

• Mercury Marine 35-18458Q3
• Mercury Marine 35-18458A3
• Mercury Marine 35-18458A2
• Mercury Marine 35-17808A1
• Mercury Marine 35-14571A1

Frequently Asked Questions

What engines does the Sierra 18-7967 fuel water separator filter fit? The 18-7967 is designed for Mercury V6 EFI outboards from 1995 and earlier, and it includes a built-in water sensor.

What is the micron rating of this filter? The Sierra 18-7967 has a 10 micron rating, which is the level recommended to protect sensitive inboard, sterndrive, and outboard fuel injection systems from damage.

How much water does the 18-7967 remove from fuel? It removes over 99.8% of emulsified water from gasoline, helping protect the EFI fuel system from water contamination.

What flow rate can the 18-7967 handle? Sierra rates the 18-7967 to flow up to 90 gallons per hour, enough to supply fuel-hungry V6 EFI motors.

Does the Sierra 18-7967 replace Mercury OEM filters? Yes, the 18-7967 is a direct replacement for Mercury Marine 35-18458Q3, 35-18458A3, 35-18458A2, 35-17808A1, and 35-14571A1.

What is the difference between the 18-7967 and the 18-7968? The 18-7967 is black and fits Mercury V6 EFI engines from 1995 and earlier, while the 18-7968 is blue and is the separate part number used for 1996-and-up Mercury V6 EFI engines. Confirm your engine's production year before ordering.

Why is the 18-7967 black instead of blue? Sierra uses the black housing on the 18-7967 to identify it as the 1995-and-earlier Mercury V6 EFI filter with sensor, keeping it visually distinct from the blue 1996-and-up version, the 18-7968.

Does the 18-7967 have a water sensor? Yes, this filter includes a built-in sensor to help detect water accumulation in the fuel.

How much does the Sierra 18-7967 weigh? The 18-7967 fuel water separator filter weighs 1.03 pounds.

What is the outer housing made of? The Sierra 18-7967 has a plastic outer housing.

Is the Sierra 18-7967 a genuine Sierra part or aftermarket? The 18-7967 is a genuine Sierra part, engineered to meet or exceed the performance of the original Mercury equipment filter it replaces and backed by Sierra's warranty.

Can I use the 18-7967 on an inboard or sterndrive with the same fittings? The 18-7967 is intended for Mercury V6 EFI applications from 1995 and earlier; Sierra 10 micron filters like this one are generally recommended to protect inboard, sterndrive, and outboard EFI fuel systems from water and particle contamination.