Sierra 18-2686 Lower Unit Seal Kit for Johnson/Evinrude Outboard Motors, Replaces OEM 304764 and 313284

The Sierra 18-2686 Lower Unit Seal Kit is a gear housing seal kit built for Johnson/Evinrude outboard motors. It bundles the shift rod gasket and oil seal needed to reseal the lower unit and restore a proper barrier against water intrusion and gear lube leakage during a gear case service or rebuild. Each component is engineered as a direct, precise-fit replacement so the kit installs the same way as the original hardware it replaces.

The kit includes a shift rod gasket that seals around the shift rod bore where it passes through the gear housing, plus an oil seal that keeps gear lubricant contained within the lower unit while blocking water from entering. Both parts are cross-referenced to their original equipment numbers so you can confirm you are ordering the correct replacement for your lower unit rebuild.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-2686
• Product Type: Lower Unit Seal Kit
• Application: Johnson/Evinrude Outboard Motor
• Kit Contents: Shift Rod Gasket (Sierra 18-0882), Oil Seal (Sierra 18-2005)
• Color: White
• Shape: Round
• UPC: 030999562852
• Weight: 0.11 pounds

Fitment

• Johnson/Evinrude outboard motors using this lower unit seal configuration; confirm your engine's part numbers before ordering, as fit is application specific.

Replaces (OEM)

• 304764
• 313284

Frequently Asked Questions

What does the Sierra 18-2686 Lower Unit Seal Kit include? The kit includes a shift rod gasket (Sierra 18-0882) and an oil seal (Sierra 18-2005) for resealing the lower unit gear housing on a Johnson/Evinrude outboard motor.

Which OEM part numbers does this kit replace? Sierra 18-2686 replaces OEM numbers 304764 and 313284, corresponding to the shift rod gasket and oil seal in the kit.

Is the Sierra 18-2686 kit OEM quality? Yes, Sierra lower unit seal kits like the 18-2686 are engineered and manufactured to meet or exceed original equipment quality and fit.

How much does the 18-2686 seal kit weigh? The Sierra 18-2686 Lower Unit Seal Kit weighs 0.11 pounds.

What engines is the 18-2686 seal kit designed for? This kit is designed for Johnson/Evinrude outboard motors; confirm your engine's specific part numbers to ensure proper fit before ordering.

What is the shift rod gasket's OEM equivalent number? The shift rod gasket included in kit 18-2686 (Sierra 18-0882) is the equivalent of OEM number 304764.

What is the oil seal's OEM equivalent number? The oil seal included in kit 18-2686 (Sierra 18-2005) is the equivalent of OEM number 313284.

When would I need the 18-2686 lower unit seal kit? This kit is used when servicing or rebuilding the lower unit gear housing on a Johnson/Evinrude outboard, replacing the shift rod gasket and oil seal to stop leaks and keep water out of the gear case.

What color and shape is the oil seal in this kit? The oil seal in the Sierra 18-2686 kit is white and round in shape.

Does the 18-2686 kit come with installation instructions? The kit ships as the seal components themselves (shift rod gasket and oil seal) for installation during a standard lower unit reseal or rebuild procedure.

What is the UPC for the Sierra 18-2686 seal kit? The UPC for the Sierra 18-2686 Lower Unit Seal Kit is 030999562852.