Prop Shaft Oil Seal – Fits Mercury/Mercruiser/Force & OMC (Replaces 26-14077, 26-76868, 320862)

Prop Shaft Oil Seal – Fits Mercury/Mercruiser/Force & OMC (Replaces 26-14077, 26-76868, 320862)

This propeller shaft oil seal fits a wide range of marine engines, including Mercury outboards (105-250 HP, 2-Stroke), MerCruiser Alpha One/Gen 2 sterndrives, and OMC Cobra/Stringer drives. It is specifically designed for applications requiring a 1.187" shaft diameter and a 1.687" seal outside diameter to fit a 1.692" housing bore.

This seal serves as a direct replacement for multiple OEM part numbers from Mercury, Johnson/Evinrude, and Force. It is also cross-compatible with parts from Sierra, GLM, and Mallory. Please verify your specific part number before ordering.

• Installation Method: Press fit into the gear housing.
• Primary Material: Durable Nitrile rubber with a steel case for longevity.
• Quantity Note: Most applications require two (2) seals per propshaft for a complete replacement.

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 Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

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.

Confirm your engine model/year in the table below.

Mercury/Mercruiser

Johnson/Evinrude/OMC

Force

Technical Specifications

Package Contents

1 x Prop Shaft Oil Seal (Replaces 26-76868/320862)

Note: Most propeller shaft applications require two seals. We recommend purchasing two units to ensure a complete installation.

Installation Guide

1. Disassemble: Following your engine's service manual, disassemble the lower unit to access the propeller shaft and bearing carrier.
2. Remove Old Seal: Carefully remove the old, worn seal(s) from the housing. Take care not to scratch or damage the housing bore.
3. Clean & Inspect: Thoroughly clean the seal housing bore and inspect it for any burrs or damage that could affect the new seal.
4. Lubricate: Apply a light coat of marine grease to the outer diameter of the new seal and the inner lip that contacts the shaft.
5. Position Seal: Place the new seal squarely into the housing bore, ensuring the garter spring faces the oil (inward).
6. Install Seal: Using a seal driver or a socket with the same outer diameter, gently and evenly press the new seal into the bore until it is fully seated.
7. Reassemble: Reinstall the propeller shaft and reassemble the lower unit components according to the manufacturer's torque specifications.

Troubleshooting & FAQ

How do I confirm this oil seal fits my engine?
First, check your original part number against our cross-reference table. Second, find your engine in the detailed compatibility tables, paying close attention to model, year, and any serial number ranges provided, especially for Mercury models.

How many seals do I need for a complete replacement?
Most outboard and sterndrive lower units require two prop shaft seals installed back-to-back. We strongly recommend verifying the requirement for your specific gearcase, but purchasing two is standard practice.

What are the signs of a failing prop shaft seal?
The most common symptoms are water intrusion into the gear lube, which makes the oil look milky or cloudy upon draining, or visible gear oil leaking from the area behind the propeller.

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.