682-44315-A0 Water Pump Impeller Gasket for Yamaha | JLM Marine

Water Pump Impeller Gasket 682-44315-A0 – Fits Yamaha 9.9 & 15 HP Outboard Engines

This water pump impeller gasket is engineered to fit Yamaha 9.9 HP and 15 HP outboard engines, covering both 2-stroke and 4-stroke models manufactured between 1984 and 2005. It ensures a reliable seal within the water pump housing, preventing leaks and maintaining proper cooling system performance.

Direct replacement for Yamaha OEM part number 682-44315-A0-00, this gasket provides an exact fit for specified engine models, ensuring straightforward installation and dependable operation.

• Compatible with Yamaha 2-stroke and 4-stroke engines (9.9 & 15 HP)
• Package includes 8 gaskets for multiple replacements or complete pump rebuilds
• Essential component for maintaining outboard cooling system integrity

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

• 8 × Gasket 682-44315-A0

Installation Guide

1. Disconnect the fuel line and remove the engine cowling to access the lower unit. Ensure the engine is cool and the boat is secured.
2. Drain the lower unit gear oil and disconnect the water intake hose if necessary.
3. Remove the bolts securing the lower unit to the mid-section and carefully separate the lower unit from the engine.
4. Locate the water pump housing on the lower unit and remove the retaining bolts or clips.
5. Carefully remove the old impeller and gasket from the housing. Inspect the housing for wear or damage.
6. Clean all mating surfaces thoroughly to remove old gasket material, debris, and corrosion.
7. Place the new gasket onto the water pump housing, ensuring proper alignment with all bolt holes.
8. Reinstall the impeller (if replacing) and secure the water pump cover, tightening bolts in a crosswise pattern to manufacturer specifications.
9. Reattach the lower unit to the mid-section, ensuring all alignment pins are seated correctly.
10. Refill the lower unit with the correct type and quantity of gear oil.
11. Reconnect the water intake hose and reinstall the engine cowling.
12. Start the engine and verify proper water flow from the tell-tale indicator to confirm successful installation.

Troubleshooting & FAQ

Q: How do I confirm this gasket fits my Yamaha engine?
A: Cross-reference your engine's model, horsepower, stroke type, and year with the compatibility table above. You can also verify by checking your engine's serial number using the Yamaha Serial Number Guide linked in the Compatible Engine Models section.

Q: How often should I replace the water pump impeller gasket?
A: It's recommended to replace the gasket every time you service or replace the water pump impeller, typically every 2–3 years or 200–300 hours of operation, whichever comes first. Always replace the gasket if you notice coolant leaks or overheating issues.

Q: What are signs that my water pump gasket is failing?
A: Common symptoms include reduced water flow from the tell-tale, engine overheating, visible water or coolant leaks around the lower unit, and decreased cooling efficiency. If you experience any of these, inspect and replace the gasket immediately.

Q: Why does this package include 8 gaskets?
A: The multi-pack provides spares for future maintenance or allows you to service multiple engines or complete multiple pump rebuilds. Having extras on hand ensures you're prepared for routine servicing without needing to reorder.

Q: Is this an OEM or aftermarket gasket?
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.