Sierra Air Box Gasket 18-0140 for Evinrude Outboard Engines

The Sierra 18-0140 Air Box Gasket is a replacement seal designed for Evinrude outboard engines, sold as part of Sierra's outboard gasket set lineup. It is installed between the air box housing and the engine intake to maintain a proper seal, preventing unmetered air, dirt, and moisture from entering the intake tract and disrupting the air/fuel mixture. A worn, cracked, or compressed air box gasket can cause a rough idle, hesitation, or an inconsistent fuel mixture, so replacing it during routine maintenance or when servicing the air box helps restore a proper seal.

This gasket is lightweight at 0.03 pounds and is identified by UPC 030999751102 and Sierra part number 18-0140. It is intended as a direct-fit replacement for the factory air box gasket on applicable Evinrude outboard engines, making it a straightforward maintenance item to keep on hand for outboard servicing.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-0140
• Product Type: Air Box Gasket
• Application: Evinrude Outboard Engines
• UPC: 030999751102
• Weight: 0.03 pounds

Fitment

Fits applicable Evinrude outboard engines. Confirm compatibility with your engine's air box before ordering.

Replaces (OEM)

No OEM cross-reference numbers are specified for this part.

Frequently Asked Questions

What engines does the Sierra 18-0140 air box gasket fit? The 18-0140 is designed for Evinrude outboard engines and is meant to be installed as a seal between the air box housing and the engine intake.

Is 18-0140 a genuine Sierra part number? Yes, 18-0140 is the Sierra manufacturer part number for this air box gasket.

How much does this gasket weigh? The 18-0140 air box gasket weighs 0.03 pounds.

What is the UPC for this part? The UPC for the Sierra 18-0140 air box gasket is 030999751102.

Where is the air box gasket installed? It seals the joint between the air box housing and the intake on the outboard engine, preventing unmetered air, dirt, and moisture from entering the intake.

What are the symptoms of a failing air box gasket? A cracked or compressed air box gasket like the 18-0140 can allow unmetered air into the intake, which may cause a rough idle, hesitation, or an inconsistent air/fuel mixture.

Are OEM cross-reference numbers available for this gasket? No OEM cross-reference numbers are listed for the Sierra 18-0140 air box gasket.

Is this gasket sold individually or as part of a set? The 18-0140 is offered as an individual air box gasket within Sierra's outboard gasket set category.

When should I replace the air box gasket? Replace the 18-0140 air box gasket any time the gasket is visibly worn, cracked, or compressed, or when servicing the air box on an Evinrude outboard.

Does this gasket require any special tools to install? The 18-0140 is a standard flat gasket that is installed by removing the air box housing and fitting the new gasket in place of the old one.