Water Pump Seal and Washer Kit – Fits Mercury Marine 30-70 HP Outboards (Replaces 26-38452, 26-38453)

Water Pump Seal and Washer Kit – Fits Mercury Marine 30-70 HP Outboards (Replaces 26-38452, 26-38453)

This water pump seal and washer kit is designed for various Mercury Marine 30-70 HP 2-stroke outboards. It is a direct-fit replacement for components within the 46-77177A3 water pump impeller kit housing, ensuring reliable performance for your engine's cooling system.

This kit serves as a direct replacement for Mercury OEM part numbers 26-38452 (seal) and 26-38453 (washer kit). It is also cross-compatible with aftermarket kits from UanofCn and YiheoZux anofCn and YiheoZux labeled with the same part numbers.

• Includes one seal and one washer kit for a complete repair.
• Engineered for a direct replacement fit, using standard tools.
• Note: Not compatible with Japanese-made Mariner Motors.

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.

Note: Not compatible with Japanese-made Mariner Motors.

Technical Specifications

Package Contents

• 1 x Seal (Replaces OEM 26-38452)
• 1 x Washer Kit (Replaces OEM 26-38453)
• 1 x Installation Instructions

Installation Guide

1. Safety First: Disconnect the engine's battery before beginning work.
2. Access the Lower Unit: Remove the lower unit (gearcase) from the outboard motor.
3. Remove Pump Housing: Unbolt and carefully lift the water pump housing off the driveshaft.
4. Extract Old Parts: Remove the old impeller, plate, and gaskets. Take note of the order and orientation.
5. Clean Surfaces: Thoroughly clean the inside of the housing and the mounting surfaces, removing any salt deposits, sealant, or corrosion.
6. Install New Seal: Carefully press the new seal (26-38452) into the pump housing, ensuring it is fully and evenly seated.
7. Install Washers: Place the new washers from the kit (26-38453) as indicated in your service manual, typically under and over the impeller.
8. Reassemble Pump: Reinstall the impeller (with a new keyway) and reassemble the water pump components.
9. Reattach Lower Unit: Bolt the lower unit back onto the outboard, ensuring all connections are secure.
10. Test Operation: Reconnect the battery. Run the engine in water and verify a strong, consistent stream from the tell-tale outlet.

Troubleshooting & FAQ

Q: How do I confirm this fits my engine?
A: This kit fits various Mercury 30-70 HP 2-stroke outboards that use the 46-77177A3 water pump housing. The best way to confirm is by checking your engine's service manual or existing part numbers. Note that it is not compatible with Japanese-made Mariner motors.

Q: What are the signs my water pump seal is failing?
A: A failing seal can cause overheating, a weak or intermittent water stream from the "tell-tale" outlet, or visible water leaking from the pump housing area. Regular inspection during impeller changes is recommended.

Q: Do I need special tools for installation?
A: No, this kit can be installed using standard marine mechanic's tools. A socket/wrench set and a screwdriver are typically sufficient.

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.