Propeller Shaft Oil Seal – Fits Johnson/Evinrude 50-125 HP (Replaces 321466, 313337, 777531)

Propeller Shaft Oil Seal – Fits Johnson/Evinrude 50-125 HP

This propeller shaft oil seal is designed for a wide range of Johnson/Evinrude outboard motors from 50 to 125 HP (1978–present). It is compatible with propeller shaft applications on many V4, V6, and select 3-cylinder models, providing a reliable seal to prevent gearcase oil leaks and water intrusion.

This part is a direct replacement for Johnson/Evinrude part numbers 321466, 313337, 318223, and 777531, and also cross-references with several popular aftermarket brands.

• Installation Type: Direct press-in replacement for a secure fit.
• Design: Features a double-lip design for enhanced sealing performance.
• Package Includes: Two individual oil seals to complete your repair.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Johnson/Evinrude owners, here’s a guide to help you identify your engine’s serial/model: Johnson/Evinrude Serial Number Guide.

Technical Specifications

Package Contents

• 2 x Oil Seals (Replaces OEM Part 321466)

Installation Guide

1. Drain Gearcase Oil: Position a drain pan under the lower unit and remove the lower and upper drain/vent screws to drain the gear oil completely.
2. Remove Propeller Assembly: Remove the cotter pin, propeller nut, and any washers. Carefully slide the propeller off the shaft.
3. Access Bearing Carrier: Depending on your model, you may need to remove the bearing carrier housing to access the old seals. This often requires a special puller tool.
4. Remove Old Seals: Carefully pry out the old oil seals from the carrier using a seal puller or flat-head screwdriver. Avoid scratching the metal housing.
5. Clean and Inspect: Thoroughly clean the seal housing area and the propeller shaft. Check for any scoring or damage that could compromise the new seals.
6. Install New Seals: Press the new seals into place using a socket or seal driver tool that matches the outer diameter of the seal. Ensure they are seated evenly and at the correct depth.
7. Reassemble: Reinstall the bearing carrier, propeller, and associated hardware. Torque the propeller nut to the manufacturer's specification and install a new cotter pin.
8. Refill Gearcase Oil: Fill the lower unit with the correct type and amount of gearcase oil through the bottom drain hole until it flows from the top vent hole. Reinstall both screws with new gaskets.

Troubleshooting & FAQ

How do I confirm this seal fits my engine?
Start by checking the "Compatible Engine Models" table. The most reliable method is to cross-reference your existing part number with those listed in our "Part Number Cross-Reference" table to ensure an exact match.

What are the signs of a failing propeller shaft seal?
The most common sign is a visible gear oil leak around the propeller shaft area. Another indicator is milky or cloudy gear oil when you drain it, which signifies water has mixed with the oil due to a failed seal.

How is this aftermarket seal different from the OEM version?
This seal is manufactured to match OEM specifications for fit and function. It features a double-lip design, which provides an extra barrier against leaks, and is constructed from a durable rubber compound with a metal backing for structural integrity.

OEM vs. Aftermarket?
This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

How fast do you ship and how much does it cost?
We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

What is your warranty and return policy?
This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.