Sierra Fuel Filter 18-7979 - Fits Mercury/Mariner 75/90/115 HP FourStroke Carbureted Outboards

The Sierra 18-7979 is a marine fuel filter engineered for Mercury and Mariner 75, 90, and 115 hp FourStroke carbureted outboard engines. Its primary job is to screen contaminants and debris out of the fuel supply before they reach the carburetor, protecting jets and internal fuel system components from clogging and premature wear caused by dirt, rust, or water in the fuel. The filter uses a metal outer housing designed to hold up in the demanding marine environment, resisting the corrosion and vibration that outboard engines are exposed to on the water.

Filtration is rated at 27 microns, giving it a fine enough screen to catch the small particulate that commonly causes rough idle, hesitation, or stalling in carbureted fuel systems. As a Sierra part, it is built to meet or exceed the performance of the original equipment part it replaces, and Sierra supplies filters of this type to OEM engine manufacturers and boat builders. Each unit ships as a single fuel filter ready for direct installation in place of the factory filter on compatible engines. It is backed by Sierra's customer satisfaction warranty, giving boat owners confidence in a straightforward, drop-in replacement for scheduled fuel system maintenance.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-7979
• Item Type: Fuel Filter
• Micron Rating: 27 microns
• Outer Material: Metal
• Weight: 0.03 pounds
• Fitment: Mercury/Mariner 75/90/115 hp FourStroke carbureted outboards
• UPC: 808282201043
• Unit Count: 1 count
• Vehicle Service Type: Boat

Fitment

• Mercury/Mariner 75/90/115 hp FourStroke carbureted outboards

Frequently Asked Questions

What engines does the Sierra 18-7979 fuel filter fit? The Sierra 18-7979 fits Mercury/Mariner 75, 90, and 115 hp FourStroke carbureted outboard engines.

Is the 18-7979 a genuine Sierra part or an aftermarket copy? It is a genuine Sierra fuel filter, engineered to meet or exceed the performance of the original equipment part it replaces.

What micron rating does this fuel filter have? 27 microns, which is the filtration rating for the Sierra 18-7979 fuel filter.

What is the filter housing made of? The Sierra 18-7979 has a metal outer housing, built to hold up in the marine environment.

How much does the Sierra 18-7979 fuel filter weigh? 0.03 pounds.

What is included when I order this filter? One Sierra 18-7979 fuel filter ships per unit, ready for direct installation.

Does the 18-7979 work on fuel-injected Mercury outboards? The Sierra 18-7979 is specified for Mercury/Mariner 75/90/115 hp FourStroke carbureted outboards, not a fuel-injected application.

Is this fuel filter covered by a warranty? Yes, the Sierra 18-7979 is backed by Sierra's customer satisfaction warranty.

When should I replace the 18-7979 fuel filter? Follow your Mercury/Mariner engine owner's manual service interval for fuel filter replacement to keep the fuel system protected.

What is the UPC for the Sierra 18-7979 fuel filter? 808282201043 is the UPC for the Sierra 18-7979 fuel filter.

Will the 18-7979 fit a Mariner-branded outboard as well as Mercury? Yes, the Sierra 18-7979 is specified to fit both Mercury and Mariner 75/90/115 hp FourStroke carbureted outboards.