Sierra Grommet 18-3329, Replaces OMC/Evinrude Johnson 302497

The Sierra 18-3329 is a machined marine grommet engineered to meet or exceed original equipment quality. It is designed as a direct replacement for OMC/Evinrude Johnson part number 302497, making it a straightforward swap when the original grommet on your outboard has hardened, cracked, or gone missing during a rebuild or routine maintenance. Grommets like this one are used to seal small openings and protect wiring, fasteners, or fittings from water intrusion, so keeping this component in good condition helps preserve the integrity of the surrounding assembly.

The Sierra 18-3329 measures 0.39 x 0.39 x 0.39 inches and weighs 0.01 pounds, making it a compact, precision-machined component sold as an individual piece. Because it is sized and manufactured to match OMC/Evinrude Johnson specifications, it installs the same way the original part did, with no modification required.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-3329
• Product Type: Grommet
• Finish: Machined
• Weight: 0.01 pounds
• Product Dimensions: 0.39 x 0.39 x 0.39 inches
• UPC: 030999875440
• Sold As: Individual piece

Replaces (OEM)

• OMC/Evinrude Johnson 302497

Frequently Asked Questions

What does the Sierra 18-3329 grommet replace? The Sierra 18-3329 is a direct replacement for OMC/Evinrude Johnson part number 302497.

What are the dimensions of the 18-3329 grommet? This grommet measures 0.39 x 0.39 x 0.39 inches.

How much does the Sierra 18-3329 weigh? It weighs 0.01 pounds.

Is the Sierra 18-3329 sold individually or in a pack? The 18-3329 grommet is sold as an individual piece.

What finish does the Sierra 18-3329 grommet have? It has a machined finish.

Will the Sierra 18-3329 fit if my original part is stamped 302497? Yes, part number 302497 is the OMC/Evinrude Johnson number that the Sierra 18-3329 directly replaces.

Is the Sierra 18-3329 an OEM part or aftermarket? The 18-3329 is a Sierra-manufactured aftermarket grommet built to meet or exceed the quality of the original equipment part it replaces, OMC/Evinrude Johnson 302497.

What is the UPC for the Sierra 18-3329 grommet? The UPC for the Sierra 18-3329 grommet is 030999875440.

Can the Sierra 18-3329 be used during an outboard rebuild? Yes, this grommet is commonly replaced during rebuilds or routine maintenance when the original 302497 grommet has hardened or cracked.

Does the Sierra 18-3329 require modification to install? No, since it is machined to match the OMC/Evinrude Johnson 302497 specifications, it installs the same way the original grommet did.