Gearcase Seal Kit – Fits Mercury/Mercury Racing Verado 200-400HP (Replaces 8M0065064)

Gearcase Seal Kit – Fits Mercury/Mercury Racing Verado 200-400HP (Replaces 8M0065064)

This gearcase seal kit is designed for Mercury Marine 200-400HP Verado 6-cylinder and L6 outboards with the 5.44" gearcase. It is also compatible with Sportmaster models.

This kit serves as a direct replacement for multiple part numbers, including Mercury Marine 8M0065064, Recmar REC8M0065064, GLM Marine 87528, and EMP 26-00681. Please note that the quality equivalence can vary significantly between different aftermarket manufacturers.

• Installation method: Direct replacement
• Designed specifically for the 5.44" torpedo lower unit/gearcase

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 Gearcase Seal Kit (Replaces 8M0065064)

Note: This kit includes a complete set of seals for the lower unit. The exact number and type of individual seals are not specified in the provided data. Please verify contents against your service manual's requirements.

Installation Guide

1. Drain the gearcase oil completely into a suitable container.
2. Remove the propeller assembly and detach the entire lower unit from the outboard motor.
3. Carefully disassemble the gearcase, laying out all components in order of removal.
4. Remove all old seals from their respective bores, paying close attention to their orientation.
5. Thoroughly clean all sealing surfaces, ensuring they are free of old adhesive, corrosion, or debris.
6. Install the new seals using the appropriate seal drivers to prevent damage and ensure they are seated correctly.
7. Reassemble the gearcase, making sure to torque all bolts and fasteners to the manufacturer's specifications.
8. Refill the gearcase with fresh, recommended lubricant to the proper level via the fill screw.
9. Perform a pressure and vacuum test on the gearcase to confirm there are no leaks before reinstallation.
10. Reinstall the lower unit onto the outboard and attach the propeller.

Troubleshooting & FAQ

Q: How can I confirm this seal kit fits my specific Verado engine?
A: This kit is designed for 200-400HP Verado models with the 5.44" gearcase. Please cross-reference your engine's model and year with the compatibility table. The most reliable method is to match the OEM part number 8M0065064 with your service manual.

Q: What are the signs that my gearcase seals need replacement?
A: Common indicators include milky or water-contaminated gear lube, visible oil leaks around the propeller shaft or driveshaft, or a failed pressure test during routine maintenance.

Q: How does this aftermarket kit compare to the genuine Mercury Marine part?
A: This is an aftermarket replacement kit manufactured to meet or exceed OEM specifications. While it replaces Mercury part 8M0065064, quality can vary among different aftermarket brands. We ensure our kits are made with high-quality materials for reliable performance.

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.