Sierra 18-7981 Fuel Filter, White - Replaces Mercury Marine 35-884380T for Mercruiser Stern Drive

The Sierra 18-7981 Fuel Filter is a white, 4 micron replacement fuel filter designed for use in Mercruiser stern drive and Mercury marine applications. Its job is to trap contaminants and fine particulate before fuel reaches the carburetor or injection system, protecting the engine from the debris, sediment, and moisture that commonly build up in marine fuel systems. Each Sierra filter is manufactured to meet or exceed the performance of the original equipment part it replaces, giving boat owners a dependable option for scheduled maintenance or a failed-filter replacement.

The 18-7981 features a plastic outer housing and is built as a universal fit part for Mercruiser stern drive and Mercury marine engines, making it a straightforward swap during routine fuel system service. It is sold as a single unit and is backed by Sierra's limited warranty.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-7981
• Product Type: Fuel Filter
• Color: White
• Filtration Rating: 4 Micron
• Outer Material: Plastic
• Fit Type: Universal Fit
• Compatible Vehicle Type: Boat
• Unit Count: 1 Count
• Weight: 0.10625 pounds
• UPC: 808282201050

Fitment

• Mercruiser stern drive applications
• Mercury marine applications

Replaces (OEM)

• Mallory 9-37970
• Mercruiser Stern Drive 35-8M0060041
• Mercruiser Stern Drive 35-8M0122423
• Mercury Marine 35-884380T
• Mercury Marine 35-8M0020349

Frequently Asked Questions

What does the Sierra 18-7981 fuel filter fit? The Sierra 18-7981 is designed for use in Mercruiser stern drive and Mercury marine applications and is built as a universal fit part for those engines.

Is the Sierra 18-7981 the same as the Mercury Marine 35-884380T filter? Yes, the Sierra 18-7981 is the OEM equivalent of Mercury Marine part 35-884380T and is built to meet or exceed the performance of that original equipment filter.

What other OEM part numbers does the 18-7981 filter cross with? This filter replaces Mallory 9-37970, Mercruiser Stern Drive 35-8M0060041, Mercruiser Stern Drive 35-8M0122423, Mercury Marine 35-884380T, and Mercury Marine 35-8M0020349.

What micron rating is the Sierra 18-7981 fuel filter? It carries a 4 micron filtration rating, sized to capture fine sediment and debris from marine fuel before it reaches the engine.

What color and material is the 18-7981 fuel filter? The Sierra 18-7981 is white with a plastic outer housing.

How much does the Sierra 18-7981 weigh? The 18-7981 fuel filter weighs 0.10625 pounds.

How many filters come in a package of the 18-7981? The Sierra 18-7981 is sold as a single unit, one filter per package.

Is the Sierra 18-7981 a genuine Sierra part or an aftermarket copy? It is a genuine Sierra-manufactured replacement part, engineered to meet or exceed the original equipment part it replaces rather than being a generic aftermarket copy.

Does the 18-7981 fuel filter fit both Mercury outboard and Mercruiser stern drive engines? Yes, the 18-7981 is designed for use in both Mercruiser stern drive and Mercury marine applications.

Is the Sierra 18-7981 filter covered by a warranty? The 18-7981 fuel filter is backed by Sierra's limited warranty.