Gimbal Bearing Oil Seal – Fits Mercruiser Alpha One Gen I & II, R/MR, Bravo I/II/III (Replaces 26-88416)

Gimbal Bearing Oil Seal – Fits Mercruiser Alpha One Gen I & II, R/MR, Bravo I/II/III (Replaces 26-88416)

This oil seal is designed for Mercruiser sterndrive applications, preventing grease from the gimbal bearing from leaking into the bilge. It is manufactured from a high-grade stainless steel housing with a Nitrile (NBR) rubber seal for superior resistance to wear, abrasion, and temperature extremes.

It is compatible with a wide range of models, including Mercruiser Alpha One (Generations I & II), R/MR, and Bravo series (I, II, and III) sterndrives produced from 1978 to the present.

• Installation Type: Direct replacement for OEM parts.
• Function: Seals the gimbal bearing to retain grease and prevent water intrusion.
• Material: Features durable stainless steel and high-grade NBR rubber construction.

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.

Technical Specifications

Package Contents

• 1 x Gimbal Bearing Oil Seal (Replaces 26-88416)

Installation Guide

1. Disconnect the battery and ensure the sterndrive is in a safe, accessible position.
2. Remove the outdrive unit to access the gimbal housing.
3. Carefully remove the old gimbal bearing and the associated oil seal. A seal puller or slide hammer may be required.
4. Clean the seal seating surface inside the housing, ensuring it is free from old grease, sealant, or debris.
5. Apply a light coat of grease to the outer edge of the new oil seal.
6. Using a suitable driver tool, carefully press the new seal into place until it is fully seated and straight.
7. Reinstall the gimbal bearing and outdrive assembly according to the manufacturer's torque specifications.
8. Reconnect the battery, start the engine, and check for any grease leaks around the new seal.

Troubleshooting & FAQ

Q: How do I confirm this fits my engine?
A: This seal is compatible with Mercruiser Alpha One (Gen I & II), R/MR, and Bravo (I, II, III) sterndrives. The most reliable way to confirm fitment is to check your sterndrive's serial number against the ranges listed in the "Compatible Engine Models" table. You can also cross-reference your existing part number with those provided (e.g., Mercury 26-88416, Sierra 18-2094).

Q: What are the signs that my gimbal bearing oil seal is failing?
A: The most common sign of a failing seal is grease leaking from the gimbal bearing area into your boat's bilge. Another symptom can be a roaring or grinding noise from the transom area, which often indicates the bearing has failed due to a lack of lubrication caused by the faulty seal.

Q: How often should I replace the gimbal bearing oil seal?
A: It is standard practice to replace the gimbal bearing oil seal every time you replace the gimbal bearing. We also recommend inspecting the seal during routine annual sterndrive service and replacing it if you notice any signs of cracking, wear, or leakage.

Q: OEM vs. Aftermarket?
A: 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.

Q: How fast do you ship and how much does it cost?
A: 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.

Q: What is your warranty and return policy?
A: 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.