26-16709A2 Upper Seal Kit for Mercruiser Bravo 1 Bravo 2 Bravo 3 X XR XZ Blackhawk | JLM Marine

Upper Seal Kit for Mercruiser Bravo 1 Bravo 2 Bravo 3 X XR XZ Blackhawk | JLM Marine

This Upper Seal Kit is engineered to fit Mercruiser Bravo I, Bravo II, and Bravo III sterndrives, as well as X, XR, XZ, and Blackhawk models from 1994–1995. It provides a complete upper seal solution to maintain optimal performance and prevent leaks in your sterndrive system.

Direct Replacement: This kit replaces multiple OEM and aftermarket part numbers, including 26-16709A2 and 26-16709A1 (Mercruiser), 18-2643 (Sierra), 87480 (GLM), and 9-74301 (Mallory), ensuring broad compatibility and easy sourcing.

• Designed for Mercruiser Bravo series sterndrives (1994–1995)
• Comprehensive seal kit for upper gearcase maintenance
• Direct fit replacement for OEM and aftermarket equivalents

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.

Technical Specifications

Package Contents

This Upper Seal Kit includes all necessary seals and components required for upper gearcase service on compatible Mercruiser sterndrive units.

Installation Guide

1. Disconnect the battery and ensure the sterndrive is properly supported on a service stand or hoist.
2. Remove the sterndrive unit from the transom assembly following manufacturer procedures.
3. Disassemble the upper gearcase by removing fasteners and separating components as outlined in your service manual.
4. Remove all old seals carefully, ensuring no debris or residue remains in the seal grooves.
5. Clean all sealing surfaces thoroughly with a suitable solvent and inspect for damage or wear.
6. Install new seals from the kit into their respective positions, using marine-grade sealant where specified.
7. Reassemble the upper gearcase components in reverse order, torquing fasteners to manufacturer specifications.
8. Reinstall the sterndrive unit onto the transom assembly and secure all mounting hardware.
9. Fill the gearcase with the correct type and quantity of gear lubricant per manufacturer recommendations.
10. Check for leaks by running the engine briefly in a test tank or on the water, observing all seal areas.
11. Reconnect the battery and perform a final operational check of the sterndrive system.
12. Dispose of old seals and lubricant properly according to local environmental regulations.

Troubleshooting & FAQ

Q: How do I confirm this seal kit fits my Mercruiser sterndrive?
A: Verify that your sterndrive is a Bravo I, II, or III (or X, XR, XZ, Blackhawk) model manufactured between 1994 and 1995. Cross-reference your existing OEM part number with the numbers listed in our Part Number Cross-Reference table above.

Q: What are the signs that my upper seals need replacement?
A: Common symptoms include gear oil leaking from the upper gearcase, oil level dropping between services, milky or contaminated gear oil (indicating water intrusion), or visible seal damage during inspection.

Q: How often should I replace the upper seals on my sterndrive?
A: Upper seals should be inspected annually and replaced as part of routine gearcase service or whenever leaks are detected. Many technicians recommend replacement every 3–5 years or during major lower unit overhauls.

Q: Can I install this kit myself, or do I need professional help?
A: Installation requires disassembly of the sterndrive upper gearcase, which involves specialized tools and knowledge of torque specifications. If you have mechanical experience and the proper service manual, a DIY installation is possible; otherwise, professional installation is recommended.

Q: Is this an OEM part or an aftermarket replacement?
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.