Sierra Fuel Filter 18-79809, Replaces 6D8-WS24A-00-00, for Yamaha F50-F115 Outboards After April 2006

The Sierra 18-79809 is a fuel filter engineered as a direct replacement for Yamaha outboard engines equipped with a filter housing marked "6D8" only. It is built for Yamaha F50-F115 outboards manufactured after April 2006, where it filters contaminants and debris from the fuel supply before they reach the carburetor or fuel injection system, helping protect internal engine components and maintain consistent fuel delivery. The filter element features a metal outer construction for durability in a marine engine compartment environment. Because Yamaha used more than one filter housing design across this engine range, this filter is matched specifically to housings marked "6D8" -- installing it in a housing with a different marking will not provide a proper fit or seal, so confirm your housing marking before ordering. This is a genuine Sierra part manufactured to match Yamaha OEM specifications, sold as a single fuel filter unit. Replacing the fuel filter at the manufacturer-recommended interval helps prevent fuel flow restrictions, hard starting, and rough running caused by a clogged or degraded filter element.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-79809
• Product Type: Fuel Filter
• Outer Material: Metal
• Weight: 0.03 pounds
• Filter Housing Marking: 6D8 only
• Unit Count: 1
• UPC: 808282277413

Fitment

• Yamaha F50-F115 outboards, after April 2006
• For filter housings marked "6D8" only

Replaces (OEM)

• 6D8-WS24A-00-00

Frequently Asked Questions

What engines does the Sierra 18-79809 fuel filter fit? The Sierra 18-79809 fits Yamaha F50-F115 outboards manufactured after April 2006.

Will this filter fit any Yamaha outboard in the F50-F115 range? Only if the engine's filter housing is marked "6D8" -- the Sierra 18-79809 is designed exclusively for that housing marking, and a different marking indicates a different filter is needed.

What OEM part number does 18-79809 replace? It replaces Yamaha OEM number 6D8-WS24A-00-00.

How do I know if my filter housing is marked 6D8? The housing marking is stamped or printed directly on the fuel filter housing itself; check that marking against "6D8" before ordering the Sierra 18-79809 to ensure correct fit.

What is the fuel filter's outer material? The Sierra 18-79809 has a metal outer construction.

How much does the 18-79809 fuel filter weigh? It weighs 0.03 pounds.

How many filters come in one Sierra 18-79809 unit? One unit includes a single fuel filter.

Is the Sierra 18-79809 a genuine Sierra part or aftermarket? The 18-79809 is manufactured by Sierra to match Yamaha OEM fitment and specifications.

How often should I replace this fuel filter? Replace the Sierra 18-79809 at your Yamaha outboard's manufacturer-recommended fuel filter service interval to avoid fuel flow restriction from a clogged element.

Is there a different Sierra filter for other Yamaha housing markings? Yes -- housings marked differently than "6D8" require a different Sierra fuel filter part number, since the 18-79809 is matched specifically to the 6D8 housing.

What symptoms indicate the fuel filter needs replacement? Hard starting, rough running, or reduced fuel flow on a Yamaha F50-F115 outboard after April 2006 can indicate the 18-79809 fuel filter needs replacing.