Sierra 18-0826 Drain Screw Gasket, OEM 90430-14115-00-00, Yamaha Outboard

The Sierra 18-0826 is a drain screw gasket engineered as a direct replacement for Yamaha outboard motors, sealing the drain screw to prevent oil or fluid seepage at the drain point. It is built from aluminum construction and finished in red, matching the original equipment appearance for a clean, factory-correct look on reinstallation. This is a small but critical sealing component: a worn or reused drain screw gasket is a common source of slow oil weeps around the drain plug, so replacing it whenever the drain screw is removed for a service interval helps maintain a proper seal and keeps the powerhead free of leaks.

Sierra manufactures the 18-0826 to match the Yamaha OEM specification 90430-14115-00-00, so it installs the same way as the original gasket with no modification required. It ships as a single gasket (package quantity of 1) sized to fit the drain screw location on covered Yamaha outboard engines. Given its light weight and compact size, it is typically kept on hand as a routine maintenance part alongside other gaskets replaced during oil changes or lower-unit service.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-0826
• Product Type: Drain Screw Gasket
• Material: Aluminum
• Color: Red
• Weight: 0.01 pounds
• Package Dimensions: 1 inch x 1 inch x 0.3 inch
• Package Quantity: 1
• Engine Type: 4 Stroke
• Fuel Type: Gasoline
• UPC: 030999874757
• OEM Cross Reference: 90430-14115-00-00

Fitment

Fits Yamaha outboard motors using drain screw gasket 90430-14115-00-00.

Replaces (OEM)

• 90430-14115-00-00

Frequently Asked Questions

What does the Sierra 18-0826 fit? The Sierra 18-0826 drain screw gasket is designed for Yamaha outboard motors and is a direct match for OEM part 90430-14115-00-00.

Is the 18-0826 the same as the Yamaha OEM gasket? Yes, the Sierra 18-0826 is manufactured to the same specification as Yamaha OEM number 90430-14115-00-00 and installs the same way.

What material is the drain screw gasket made from? It is made from aluminum, finished in red to match the original Yamaha appearance.

How many gaskets come in a package? The Sierra 18-0826 ships as a single gasket, with a package quantity of 1.

What are the dimensions of the 18-0826? Packaged dimensions are 1 inch by 1 inch by 0.3 inch, reflecting the small size typical of a drain screw gasket.

How much does the 18-0826 weigh? The Sierra 18-0826 weighs 0.01 pounds.

When should I replace this gasket? This drain screw gasket should be replaced any time the drain screw is removed, such as during an oil change or lower-unit service, since a reused gasket is a common source of slow leaks around the drain plug.

Is the 18-0826 an aftermarket or genuine part? The 18-0826 is a Sierra-manufactured gasket built to match the Yamaha OEM specification 90430-14115-00-00, rather than a Yamaha-branded part.

What engine type is this gasket used with? The Sierra 18-0826 drain screw gasket is used on 4 stroke gasoline outboard engines.

Does the color of the gasket matter for fit? No, the red finish on the Sierra 18-0826 is a cosmetic match to the original equipment and does not affect the seal or fit.