Sierra 18-2681 Lower Unit Seal Kit for Johnson/Evinrude Outboard Motors, Replaces GLM 87617

The Sierra 18-2681 Lower Unit Seal Kit is a complete gear housing seal kit built for Johnson and Evinrude outboard motors. It is assembled in Sierra's Illinois factory to OEM-quality standards, so every seal is engineered for the specific application it is designed to fit rather than sold as a generic, one-size-fits-all part. This kit gives outboard owners and marine technicians the seals needed to rebuild or service the lower unit gear housing, restoring the water-tight and oil-tight barriers that keep gear lube in and water out during operation.

Because lower unit seals are wear items subject to constant exposure to gear oil, water pressure, and heat, replacing them as a set during a lower unit rebuild or gearcase service helps prevent water intrusion and gear lube contamination, which are common causes of lower unit failure. The kit is packaged as a single unit count, ready to install as part of a routine lower unit service or repair.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2681
• Product Type: Lower Unit Seal Kit
• Fits: Johnson/Evinrude Outboard Motor
• Replaces: GLM 87617
• Color: White
• Shape: Round
• Weight: 0.09 pounds
• UPC: 030999562807
• GTIN: 00030999562807
• Unit Count: 1

Fitment

This seal kit is designed for Johnson/Evinrude outboard motors.

Replaces (OEM)

GLM 87617

Frequently Asked Questions

What does the Sierra 18-2681 Lower Unit Seal Kit include? It includes the seals needed to rebuild the gear housing of a Johnson/Evinrude outboard lower unit, packaged as a single kit with a unit count of one.

Which outboard motors is the 18-2681 seal kit designed for? The 18-2681 kit is designed to fit Johnson/Evinrude outboard motors.

Does the Sierra 18-2681 replace GLM 87617? Yes, the Sierra 18-2681 lower unit seal kit is a direct replacement for GLM 87617.

How much does the 18-2681 seal kit weigh? The Sierra 18-2681 Lower Unit Seal Kit weighs 0.09 pounds.

Is this an OEM Sierra part or an aftermarket copy? The 18-2681 is a genuine Sierra part, assembled in Sierra's Illinois factory to OEM-quality standards rather than being a generic aftermarket copy.

What color are the seals in this kit? The seals in the Sierra 18-2681 kit are white.

When would I need to install this seal kit? This kit is used when rebuilding or servicing the gear housing of a Johnson/Evinrude outboard lower unit, typically during a scheduled lower unit rebuild or after a water-intrusion issue.

What shape are the seals in the 18-2681 kit? The seals included in the Sierra 18-2681 kit are round.

Why replace lower unit seals as a full kit instead of individually? Replacing all the seals together, as in the Sierra 18-2681 kit, ensures the entire gear housing is resealed at once, which helps prevent water intrusion and gear lube contamination that can occur if only one worn seal is replaced.

What is the UPC for the Sierra 18-2681 seal kit? The UPC for the Sierra 18-2681 Lower Unit Seal Kit is 030999562807.

How many seal kits come in one package? One Sierra 18-2681 Lower Unit Seal Kit is included per unit, with a unit count of 1.