Oil Seal – Fits Johnson/Evinrude Outboards & OMC Sterndrive (Replaces 0330137, 0313398)

Product Details

This aftermarket shaft oil seal is listed for use with selected Johnson/Evinrude outboard midsections and OMC Cobra sterndrive lower gearcases. It forms a sealing barrier that helps retain lubricant and limit the entry of water, dirt, and other external contaminants.

This replacement is listed against Johnson/Evinrude/OMC reference numbers 0330137 and 0313398, with additional aftermarket references shown in the cross-reference table below. Always compare the dimensions, sealing arrangement, and original part before ordering.

• Designed for a press-fit installation when the application requires it.
• Rubber sealing material with a metal casing for use in marine service environments.
• Helps retain lubricating oil while blocking external contaminants.

Part Number Matrix

Use these references as a comparison aid only. Confirm the original part, application, and dimensions before installation.

Technical Specs

Product Type

Shaft oil seal

Installation

Direct-fit replacement when matched to the original application

Connection

Press fit

Housing Material

Rubber with metal casing

Outer Diameter

1.624" (41.2 mm)

Inner Diameter / Shaft Size

1.125" (28.6 mm)

Width

0.250" (6.35 mm)

Function

Helps retain lubricating oil and limit the entry of external contaminants

What’s in the Box

• 1 x Oil Seal

Installation Notes

1. Ensure the engine is switched off, cool, and safely secured. Disconnect the battery where applicable.
2. Access the assembly where the old seal is installed, such as the lower gearcase or midsection. Component removal may be required; follow the applicable service manual.
3. Remove the old oil seal with a suitable seal puller or carefully with a flat-head screwdriver. Avoid scratching the housing or shaft.
4. Clean the seal bore and shaft surface thoroughly, removing old sealant, corrosion, lubricant residue, and debris.
5. Lightly lubricate the outer edge and sealing lip with a lubricant compatible with the seal material.
6. Position the new seal squarely in the bore. Unless the service manual specifies otherwise, the spring-loaded sealing lip should face the lubricant being retained.
7. Use a seal driver or a socket that contacts the outer diameter evenly. Tap the seal into position without damaging the lip or casing, and seat it to the original depth or the service-manual specification.
8. Reassemble the removed components using the applicable torque specifications. Check the lubricant level and inspect for leaks before returning the equipment to service.

Troubleshooting & FAQ

Safety & Important Info

• Verify the application, reference numbers, dimensions, and original seal configuration before ordering.
• Do not operate equipment if the gearcase or drive shows lubricant loss or water contamination.
• Use appropriate lifting, blocking, and personal protective equipment when working on an outboard or sterndrive.
• Professional installation is recommended when access requires removal of the gearcase, shaft, or other major components.

About Sea Sierra

• Marine Replacement Parts — We provide aftermarket components for common marine repair and maintenance applications.
• Application-Focused Information — Reference numbers and dimensions are provided to help customers compare replacement parts.
• Fitment Responsibility — Always verify the original part and applicable service information before installation.