Sierra Fuel Filter 18-7781, Replaces Yamaha Outboard 61N-24563-00-00

The Sierra 18-7781 is an inline fuel filter engineered as a direct replacement for select Yamaha outboard engines. It is designed to trap contaminants, water, and debris before they reach the carburetor or fuel injection system, helping protect internal engine components from the damage that dirty or wet fuel can cause. This filter is tested and approved for use with ethanol-based fuels, making it suitable for the ethanol-blended gasoline commonly sold at the pump today, and it is built to meet the demands of modern high-performance outboard engines.

As a direct OEM replacement, the 18-7781 is designed to install with the same fit and function as the original Yamaha filter it replaces, so no modification is needed during installation. Sierra filters undergo extensive testing in real-world conditions, which is why both professional marine technicians and do-it-yourself boat owners rely on them to keep engines protected. The filter is backed by Sierra's manufacturer warranty for added peace of mind.

This is a compact, lightweight component intended for routine fuel system maintenance and scheduled filter replacement on compatible Yamaha outboard engines.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-7781
• Product Type: Fuel Filter
• Vehicle Service Type: Watercraft
• Weight: 0.01 pounds
• Unit Count: 1 filter
• Ethanol Fuel Compatible: Yes
• Included Components: Fuel Filter
• Warranty: Limited Warranty

Fitment

• Yamaha outboard engines

Replaces (OEM)

• Yamaha 61N-24563-10-00
• Yamaha 61N-24563-00-00
• Yamaha 6R3-24563-00-00

Frequently Asked Questions

What does the Sierra 18-7781 fuel filter fit? The Sierra 18-7781 is designed for Yamaha outboard engines and directly replaces the Yamaha filters referenced by part numbers 61N-24563-10-00, 61N-24563-00-00, and 6R3-24563-00-00.

Is the 18-7781 a genuine Sierra part or aftermarket? The 18-7781 is a genuine Sierra International fuel filter, manufactured by Sierra as a direct replacement for the original Yamaha outboard filter, not a generic third-party part.

What OEM part numbers does the Sierra 18-7781 replace? It replaces Yamaha 61N-24563-10-00, 61N-24563-00-00, and 6R3-24563-00-00, so any of those OEM numbers can be cross-referenced to this filter.

How much does the 18-7781 fuel filter weigh? The Sierra 18-7781 fuel filter weighs 0.01 pounds, making it a lightweight, compact component for routine fuel system maintenance.

Will this filter work with ethanol-blended gasoline? Yes, the Sierra 18-7781 is tested and approved for use with ethanol-based fuels, so it is compatible with the ethanol-blended gasoline commonly available at fuel pumps.

How many filters are included when I order the 18-7781? One Sierra 18-7781 fuel filter is included per unit purchased.

Does the Sierra 18-7781 come with a warranty? Yes, the 18-7781 fuel filter is backed by Sierra's limited manufacturer warranty.

What is the difference between this filter and the original Yamaha filter? Functionally, the Sierra 18-7781 is a direct OEM replacement for the Yamaha 61N-24563-00-00 and related part numbers, engineered to install and perform the same as the original equipment filter it replaces.

Is the Sierra 18-7781 easy to install as a replacement? As a direct replacement filter, the 18-7781 is designed to install in place of the original Yamaha outboard fuel filter without requiring modification.

Who typically uses Sierra fuel filters like the 18-7781? Both professional marine technicians and do-it-yourself boat owners use Sierra filters such as the 18-7781, since they are tested extensively in real-world conditions to protect outboard engines.