Propeller Shaft Oil Seal – Fits Johnson/Evinrude 50-125 HP (Replaces 321466, 313337, 777531)
Propeller Shaft Oil Seal – Fits Johnson/Evinrude 50-125 HP (Replaces 321466, 313337, 777531) is backordered and will ship as soon as it is back in stock.
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Propeller Shaft Oil Seal – Fits Johnson/Evinrude 50-125 HP (Replace...
Product Details
This Propeller Shaft Oil Seal is designed for Johnson/Evinrude outboard motors from 50-125 HP, covering models from 1978 to the present. It is compatible with propeller shaft applications on various V4, V6, and some 3-cylinder engines, ensuring a precise fit for lower unit repairs.
It serves as a direct interchange for Johnson/Evinrude part numbers 321466, 313337, 318223, and 777531, as well as aftermarket equivalents like Sierra 18-2059, GLM 86160, and Mallory 9-76205.
- Installs as a direct press-in replacement.
- Features a durable double-lip design for superior sealing.
- The package includes two seals to complete the job.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Johnson/Evinrude | 321466 / 0321466 |
| Johnson/Evinrude | 313337 / 0313337 |
| Johnson/Evinrude | 318223 / 0318223 |
| Johnson/Evinrude | 777531 / 0777531 |
| Sierra | 18-2059 |
| GLM | 86160 |
| Mallory | 9-76205 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Johnson/Evinrude | V4, V6 | 50-55 | 2-Stroke | 1978–present | 321466 | Lower unit application |
| Johnson/Evinrude | V4, V6 | 60-75 | 2-Stroke | 1978–present | 321466 | Lower unit application |
| Johnson/Evinrude | V4, V6 | 85-125 | 2-Stroke | 1978–present | 321466 | Lower unit application |
Technical Specs
- Product Type
- Propeller Shaft Oil Seal
- Installation
- Direct press-in replacement
- Housing Material
- Rubber with metal backing
- Dimensions
- O.D.: 1.126" (28.6 mm), I.D.: 0.750" (19.05 mm), Width: 0.200" (5.08 mm)
- Fitting Type
- Press-fit
- Other Technical Attributes
- Double-lip design
What’s in the Box
- 2 x Oil Seals (321466/0321466)
Installation Notes
- Drain the gearcase lubricant completely from the lower unit.
- Remove the propeller assembly and any related thrust washers or hardware.
- Unbolt and carefully extract the bearing carrier housing from the gearcase.
- Using a seal puller or flat-head screwdriver, pry out the old oil seal(s), being careful not to scratch the carrier housing.
- Thoroughly clean the seal seating area within the carrier to remove any old sealant, corrosion, or grime.
- Apply a thin coat of marine grease to the outer edge of the new seal.
- Position the new seal and press it in squarely using a seal driver or a socket that matches the seal's outer diameter until it is fully and evenly seated.
- Reinstall the bearing carrier, propeller assembly, and all other components in reverse order of removal.
- Refill the gearcase with fresh, manufacturer-specified lubricant to the correct level.
Troubleshooting & FAQ
How do I confirm this seal fits my engine?
First, check if your engine is a Johnson/Evinrude between 50-125 HP made from 1978 onwards. The best method is to match an existing part number from your old seal or service manual to the equivalents in our Part Number Matrix (e.g., 321466, Sierra 18-2059). Verifying the dimensions in the Technical Specs section against your old part is also a reliable check.
What are the signs of a failing propeller shaft seal?
The most common sign is "milky" or creamy-looking gear lube, which indicates water has mixed with the oil. You may also notice gear oil leaking from the propeller shaft area. Performing regular gear lube checks helps catch seal failure early.
What does the "double-lip design" do?
A double-lip seal offers superior protection. The inner lip is designed to keep the gear oil inside the lower unit, while the outer lip acts as a barrier to prevent water and debris from getting in. This dual-action design significantly improves reliability and longevity.
How often do these seals need to be replaced?
There is no specific service interval. The seals should be replaced whenever the gearcase is serviced for other reasons or immediately if you detect water in the gear lube. It's good practice to inspect them annually during winterization or pre-season prep.
Is a special tool required for installation?
While not mandatory, a dedicated seal puller and a proper seal driver (or a socket of the exact same outer diameter) are highly recommended. These tools make the job much easier and significantly reduce the risk of damaging the new seal or the carrier housing during installation.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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