Sierra 18-7866 High Capacity 10 Micron Fuel Water Separator Filter, Replaces Yamaha MAR-FUELF-IL-TR

The Sierra 18-7866 is a High Capacity 10 Micron fuel water separator filter built to protect sensitive inboard, sterndrive, and outboard fuel injection systems from water contamination and particulate damage. It removes over 99.8 percent of emulsified water from gasoline and is over 90 percent efficient at removing particles as small as 10 micron, while still flowing 90 gallons per hour to keep fuel delivery adequate for high-demand engines. This High Capacity filter measures 6 inches (152.4 mm), giving it more media surface area and longer service intervals than Sierra's Compact 10 Micron and Short/Long 21 Micron filter options.

The 18-7866 is a direct equivalent for the Yamaha MAR-FUELF-IL-TR fuel filter, making it a straightforward replacement when servicing fuel systems that call for that part number. Regular replacement of the fuel water separator is a key maintenance step for preventing water-related damage to injectors, carburetors, and fuel pumps in marine engines.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-7866
• Description: High Capacity Fuel Water Separator Filter
• Filter Size: High Capacity - 6 inches (152.4 mm)
• Micron Rating: 10 Micron
• Flow Rate: 90 GPH
• Water Removal: Removes over 99.8% of emulsified water from gasoline
• Particle Filtration: Over 90% efficient at removing particles as small as 10 micron
• OEM Equivalent Part Number: Yamaha MAR-FUELF-IL-TR
• Outer Material: Aluminum or Stainless Steel
• Weight: 1.31 pounds
• UPC: 808282187330
• Unit Count: 1

Fitment

• Yamaha fuel systems specified for the MAR-FUELF-IL-TR filter

Replaces (OEM)

• MAR-FUELF-IL-TR

Frequently Asked Questions

What does the Sierra 18-7866 fuel filter replace? The Sierra 18-7866 is a direct equivalent for the Yamaha MAR-FUELF-IL-TR fuel water separator filter, so it can be used wherever that part number is specified.

How much water can this filter remove from fuel? It removes over 99.8 percent of emulsified water from gasoline, which is the primary function of the 18-7866 High Capacity fuel water separator filter.

What micron rating is the 18-7866 filter? 10 micron. The Sierra 18-7866 is over 90 percent efficient at removing particles as small as 10 micron from the fuel.

What is the flow rate of the 18-7866 filter? 90 gallons per hour, which is sufficient to feed high-demand inboard, sterndrive, and outboard fuel injection systems without restricting fuel delivery.

How big is the Sierra 18-7866 filter? It is the High Capacity size, measuring 6 inches (152.4 mm), which is longer than Sierra's Compact 10 Micron filter and the Short and Long 21 Micron filters in the same lineup.

How much does the 18-7866 weigh? The Sierra 18-7866 weighs 1.31 pounds.

What is the difference between the 18-7866 and a 21 Micron replacement filter? The 18-7866 filters down to 10 micron for finer particle removal, while Sierra's 21 Micron replacement filters (short and long versions) use a coarser rating intended for less fine filtration needs.

Is the 18-7866 the same as Sierra's Compact 10 Micron filter? No, the 18-7866 is the High Capacity 6 inch version, while the Compact 10 Micron filter is a shorter, smaller-capacity design; both share the same 10 micron rating but differ in size and capacity.

What material is the outer housing of the 18-7866 made of? The outer housing of the Sierra 18-7866 fuel water separator filter is aluminum or stainless steel.

Why should I replace my fuel water separator filter regularly? A fuel water separator filter like the Sierra 18-7866 prevents water and particulate contamination from reaching sensitive fuel injection components; replacing it on schedule helps avoid damage to injectors, pumps, and carburetors.

Does the 18-7866 come as a single filter or a kit? The Sierra 18-7866 is sold as a single fuel water separator filter, with a unit count of 1.

Is the Sierra 18-7866 a genuine OEM part or an aftermarket replacement? The 18-7866 is a Sierra aftermarket filter engineered as a direct equivalent to the Yamaha MAR-FUELF-IL-TR, meeting or exceeding the specifications of the original part it replaces.