Sierra Bearing Housing Gasket 18-2891, Replaces 324937 and 303339, Evinrude 6 HP, Pack of 2

The Sierra 18-2891 Bearing Housing Gasket is a replacement gasket engineered for the bearing housing on Evinrude 6 HP outboard motors. It is sold as a package of 2, giving boat owners and technicians a spare on hand for the next service interval or a second unit for a shop stocking multiple repairs. The gasket seals the bearing housing to prevent water intrusion and maintain proper lubrication at the mating surface, a common failure point that leads to water contamination or oil loss if the old gasket has hardened, cracked, or lost its seal over time.

This gasket is part of Sierra's Evinrude Outboard Gasket Sets line, built to match OEM dimensions and material specifications so it seats correctly against the original bearing housing without additional trimming or fitting. Because it directly replaces Evinrude part numbers 324937 and 303339, it is a straightforward drop-in swap during a bearing housing service, water pump job, or lower unit rebuild on compatible 6 HP Evinrude outboards.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2891
• Product Name: Bearing Housing Gasket
• Package Quantity: 2
• Weight: 0.02 pounds
• UPC: 030999313980
• Fitment: Evinrude 6 HP
• OEM Cross Reference: 324937, 303339

Fitment

• Evinrude 6 HP outboard motors

Replaces (OEM)

• 324937
• 303339

Frequently Asked Questions

What does the Sierra 18-2891 gasket fit? The Sierra 18-2891 Bearing Housing Gasket is designed for Evinrude 6 HP outboard motors.

Does 18-2891 replace OEM part 324937? Yes, Sierra 18-2891 is a direct replacement for Evinrude OEM part number 324937.

Does 18-2891 also replace OEM part 303339? Yes, this bearing housing gasket also replaces Evinrude OEM part number 303339.

How many gaskets come in a package of 18-2891? Each package of the Sierra 18-2891 Bearing Housing Gasket contains 2 gaskets.

How much does the 18-2891 gasket weigh? The Sierra 18-2891 Bearing Housing Gasket weighs 0.02 pounds per package.

Is the Sierra 18-2891 gasket a genuine Sierra part? Yes, 18-2891 is a genuine Sierra Bearing Housing Gasket manufactured to fit Evinrude 6 HP outboards as a direct replacement for OEM numbers 324937 and 303339.

When would I need to replace the bearing housing gasket on my Evinrude 6 HP? A bearing housing gasket like the Sierra 18-2891 should be replaced any time the bearing housing is removed for service, such as during a lower unit rebuild or water pump repair, or if the old gasket shows signs of hardening or cracking.

What is included with the Sierra 18-2891 purchase? Purchasing the Sierra 18-2891 includes a package of 2 Bearing Housing Gaskets for Evinrude 6 HP outboard motors.

Can I use 18-2891 on outboards other than the Evinrude 6 HP? The Sierra 18-2891 Bearing Housing Gasket is specified for Evinrude 6 HP outboard motors; fitment on other models is not confirmed.

What is the UPC for the Sierra 18-2891 gasket? The Sierra 18-2891 Bearing Housing Gasket carries UPC 030999313980.