Sierra 18-0989 Air Silencer Gasket, Replaces GLM 34430, Evinrude/Johnson 321794, Mallory 9-60418

The Sierra 18-0989 Air Silencer Gasket is a replacement gasket engineered to meet or exceed original equipment quality for outboard engines using this air silencer configuration. It is a direct cross-reference for GLM 34430, Evinrude/Johnson 321794, and Mallory 9-60418, making it a straightforward drop-in replacement wherever one of those part numbers is called for. The gasket is finished in white and is built to seal reliably at the air silencer joint, helping maintain proper intake sealing and preventing air leaks that can affect engine performance.

This gasket is a fit-specific part, so buyers should confirm the part number against their existing hardware or a parts diagram before ordering to ensure proper fit. At 0.11 pounds, it ships as a lightweight, single-component gasket ready to install in place of a worn or damaged original.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-0989
• Product Name: Air Silencer Gasket
• Color: White
• Weight: 0.11 pounds
• UPC: 030999755704
• GTIN: 00030999755704
• Category: Evinrude Outboard Gasket Sets

Fitment

Fit specific; check part numbers to ensure proper fit before ordering.

Replaces (OEM)

• GLM 34430
• Evinrude/Johnson 321794
• Mallory 9-60418

Frequently Asked Questions

What does the Sierra 18-0989 Air Silencer Gasket replace? It cross-references to GLM 34430, Evinrude/Johnson 321794, and Mallory 9-60418, so any of those part numbers can be replaced with Sierra 18-0989.

Is this a genuine Sierra part or an aftermarket copy? Sierra 18-0989 is manufactured by Sierra and is built to meet or exceed the quality of the original equipment part it replaces.

How much does this gasket weigh? The Sierra 18-0989 Air Silencer Gasket weighs 0.11 pounds.

What color is the 18-0989 gasket? It is finished in white.

Will this gasket fit any outboard air silencer? No, Sierra 18-0989 is a fit-specific part, so buyers should check part numbers against their existing hardware before ordering to ensure proper fit.

What is included when I order this part? The order includes one Sierra 18-0989 Air Silencer Gasket.

Is the Evinrude/Johnson 321794 gasket the same as the Sierra 18-0989? Yes, Evinrude/Johnson 321794 is listed as an interchangeable equivalent to Sierra 18-0989.

Does the Mallory 9-60418 gasket cross-reference to this Sierra part? Yes, Mallory 9-60418 is a direct cross-reference to Sierra 18-0989 Air Silencer Gasket.

What is the UPC for this gasket? The UPC for the Sierra 18-0989 Air Silencer Gasket is 030999755704.

How do I know if I need the 18-0989 gasket instead of another Sierra gasket? Match your existing part number against GLM 34430, Evinrude/Johnson 321794, or Mallory 9-60418 to confirm that Sierra 18-0989 is the correct replacement.