Sierra 18-2683 Lower Unit Seal Kit for OMC King Cobra Lower Unit (1990)

The Sierra 18-2683 Lower Unit Seal Kit is a complete gear housing seal kit for the OMC King Cobra Lower Unit (1990). It bundles the oil seal, bearing housing gasket, and spaghetti seal needed to properly reseal the lower unit gear housing during a rebuild or service, restoring the water-tight and oil-tight barriers that keep gear lube contained and water out of the gearcase. Each component in the kit carries its own Sierra part number and matches the original equipment (O.E.) reference number, so the kit is a direct fit for the components it is designed to service. The oil seal (Sierra 18-2023, O.E. 313282) is supplied in the quantity of two required by the application, and the bearing housing gasket (Sierra 18-2891, O.E. 303339) is supplied as a single gasket. The spaghetti seal (O.E. 309044) rounds out the kit as the third sealing component, supplied in a quantity of one. Sierra manufactures its parts to meet or exceed the original equipment part being replaced, and supplies OEM engine manufacturers and boat builders with parts on a daily basis. This kit is intended for the OMC King Cobra Lower Unit (1990) and is sold as a complete set rather than as individual seals, making it a convenient single purchase for a lower unit reseal job.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2683
• Product Type: Lower Unit Seal Kit
• Weight: 0.1 pounds
• Color: White
• Shape: Round
• UPC: 030999562821
• Fitment: OMC King Cobra Lower Unit (1990)
• Includes - Oil Seal: Sierra 18-2023, O.E. 313282, Qty 2
• Includes - Bearing Housing Gasket: Sierra 18-2891, O.E. 303339, Qty 1
• Includes - Spaghetti Seal: O.E. 309044, Qty 1

Fitment

OMC King Cobra Lower Unit (1990).

Kit Contents (OEM Cross-Reference)

• Oil Seal - Sierra 18-2023 - O.E. 313282 - Qty 2
• Bearing Housing Gasket - Sierra 18-2891 - O.E. 303339 - Qty 1
• Spaghetti Seal - O.E. 309044 - Qty 1

Frequently Asked Questions

What does the Sierra 18-2683 Lower Unit Seal Kit fit? The Sierra 18-2683 Lower Unit Seal Kit is designed for the OMC King Cobra Lower Unit (1990).

What is included in the 18-2683 kit? The kit contains an oil seal (Sierra 18-2023, O.E. 313282, quantity 2), a bearing housing gasket (Sierra 18-2891, O.E. 303339, quantity 1), and a spaghetti seal (O.E. 309044, quantity 1).

How many oil seals come in the 18-2683 kit? Two oil seals are included, Sierra part number 18-2023 with O.E. Reference 313282.

Is the bearing housing gasket in this kit the same as O.E. 303339? Yes, the bearing housing gasket in the Sierra 18-2683 kit is Sierra 18-2891, which corresponds to O.E. Number 303339.

How much does the 18-2683 seal kit weigh? The Sierra 18-2683 Lower Unit Seal Kit weighs 0.1 pounds.

What color is the Sierra 18-2683 kit packaging or seal material? The listed color for the Sierra 18-2683 Lower Unit Seal Kit is white.

Does this kit include gear lube or other lower unit fluids? No, the 18-2683 kit contains only the sealing components (oil seal, bearing housing gasket, and spaghetti seal) needed to reseal the lower unit.

Are Sierra parts equivalent to OEM in quality? Sierra manufactures the 18-2683 kit and its components to meet or exceed the original equipment part being replaced, and Sierra supplies parts to OEM engine manufacturers and boat builders.

What is the spaghetti seal used for in this kit? The spaghetti seal (O.E. 309044) included in the Sierra 18-2683 kit is one of the three sealing components used during a lower unit reseal, supplied in a quantity of one.

Is the 18-2683 sold as individual seals or a complete kit? The Sierra 18-2683 is sold as a complete lower unit seal kit containing the oil seal, bearing housing gasket, and spaghetti seal together rather than as separate parts.