6H3-44315-A0 Water Pump Impeller Gasket for Yamaha FT50B FT50C FT50G FT50J FT60B FT60D FT60G 60F 70B | JLM Marine

Water Pump Impeller Gasket – Fits Yamaha 4-Stroke FT50B, FT50C, FT50G, FT50J, FT60B, FT60D, FT60G & 2-Stroke 60F, 70B Outboards

This high-quality water pump impeller gasket is engineered for Yamaha marine outboard engines, providing a reliable seal for your cooling system. Designed to fit both 2-stroke and 4-stroke models ranging from 50 to 70 HP, it ensures optimal water flow and prevents leaks that can lead to overheating.

Direct Replacement for OEM Part Number: 6H3-44315-A0

• Essential component for maintaining proper engine cooling and preventing water pump failure
• Compatible with both 2-stroke and 4-stroke Yamaha outboard models
• Precision-manufactured to meet OEM specifications for reliable fitment and performance

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

Technical Specifications

Package Contents

Your purchase includes:

• 1 x Impeller Gasket 6H3-44315-A0

Installation Guide

1. Disconnect the battery and remove the engine cover to access the lower unit. Ensure the engine is completely cool before starting work.
2. Remove the bolts securing the water pump housing using the appropriate socket wrench. Carefully lift off the housing to expose the impeller assembly.
3. Remove the old impeller gasket from the pump housing, cleaning all residue from the mating surfaces with a gasket scraper or fine abrasive pad.
4. Inspect the impeller for wear or damage; replace if blades are cracked, torn, or deformed.
5. Clean both the upper and lower gasket surfaces thoroughly to ensure a proper seal. Use a clean, lint-free cloth and ensure no debris remains.
6. Position the new gasket 6H3-44315-A0 onto the pump housing, aligning all bolt holes carefully.
7. Reinstall the impeller into the housing, ensuring the drive key engages properly with the driveshaft slot.
8. Place the water pump housing back onto the lower unit, ensuring the gasket remains properly aligned.
9. Install and hand-tighten all mounting bolts in a cross pattern to ensure even seating. Then torque bolts to manufacturer specifications.
10. Reconnect the battery and prepare to test the cooling system on the water or using a flushing attachment.
11. Start the engine and verify water flow from the tell-tale indicator. Check for any leaks around the pump housing.
12. If no leaks are detected and water flow is strong, reinstall the engine cover and perform a brief operational test.

Troubleshooting & FAQ

Q: How do I confirm this gasket fits my Yamaha outboard?
A: Cross-reference your engine model and year with the compatibility table above. Verify your OEM part number matches 6H3-44315-A0 by checking your service manual or the original gasket. If your model is listed but you notice any dimensional differences, contact us before purchasing.

Q: How often should I replace the water pump impeller gasket?
A: Replace the gasket every time you service the water pump impeller, typically every 2-3 years or 200-300 hours of operation. Always use a new gasket during reassembly to prevent leaks and ensure a proper seal.

Q: What are the signs that my water pump gasket needs replacement?
A: Common symptoms include water or steam coming from around the pump housing, engine overheating, weak water flow from the tell-tale indicator, or visible coolant leaks near the lower unit. Any of these signs warrant immediate inspection.

Q: Can I reuse the old gasket if it looks intact?
A: No, gaskets are designed for one-time use. Reusing an old gasket compromises the seal and can lead to water leaks and engine overheating. Always install a fresh gasket during water pump service.

Q: Is this an OEM gasket or 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.