682-44352 Water Pump Impeller Kit for Yamaha 9.9HP 15HP | JLM Marine

Water Pump Impeller Kit for Yamaha 9.9HP 15HP Outboard | 682-44352

This water pump impeller replacement kit is engineered for Yamaha outboard engines rated at 9.9 HP and 15 HP, covering model years 1984–1993, 1998, 2004, and 2005. It delivers reliable cooling system performance to keep your engine running at optimal temperatures on the water.

This kit directly replaces OEM part numbers 682-44352-00-00, 682-44352-01-00, 682-44352-02-00, 682-44352-03-00, 682-44352-40-00, and aftermarket equivalent Sierra Marine 18-3074.

• Complete rebuild kit includes impeller, key, grommet, and gaskets
• Fits Yamaha 9.9 HP (1984–1993, 1998, 2004, 2005) and 15 HP (1984–1993) outboards
• Restores water pump efficiency and prevents overheating

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

This kit includes all essential components for a complete water pump impeller replacement:

• 1× Impeller (682-44352)
• 1× Key (90280-03024)
• 1× Grommet (682-44365)
• 2× Gasket (682-44315-A0)

Installation Guide

1. Disconnect the fuel line and remove the lower unit from the outboard motor following your service manual.
2. Locate the water pump housing on the lower unit. Remove the bolts securing the pump cover and set them aside.
3. Remove the old impeller carefully, noting the direction of the vanes. Inspect the housing and plate for wear or corrosion.
4. Clean all mating surfaces thoroughly, removing old gasket material and debris.
5. Install the new grommet into the water pump housing as indicated in your engine diagram.
6. Insert the drive key (90280-03024) into the impeller shaft slot.
7. Lubricate the new impeller with glycerin or soapy water. Gently fold the vanes in the correct rotational direction and slide the impeller onto the driveshaft.
8. Position the new gaskets (682-44315-A0) on both sides of the pump housing, ensuring proper alignment.
9. Reassemble the pump cover and tighten the mounting bolts to manufacturer torque specifications in a cross pattern.
10. Reinstall the lower unit onto the outboard, aligning the water tube and shift linkage carefully.
11. Reconnect the fuel line and any disconnected hoses.
12. Test the water pump by running the engine in a test tank or on muffs, verifying strong water flow from the tell-tale indicator.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my Yamaha outboard?
A: Check the compatibility table above for your engine's horsepower and year range (9.9 HP or 15 HP, 1984–1993, 1998, 2004, 2005). You can also cross-reference your original impeller part number against the OEM numbers listed (682-44352 series).

Q: How often should I replace my water pump impeller?
A: We recommend inspecting the impeller annually and replacing it every 2–3 years or 200–300 hours of operation, whichever comes first. Replace immediately if you notice overheating, reduced water flow from the tell-tale, or visible vane damage.

Q: What are the signs of a failing water pump impeller?
A: Common symptoms include engine overheating, weak or no water stream from the tell-tale indicator, steam from the engine, and loss of power. If you experience any of these, inspect and replace the impeller promptly.

Q: Do I need to replace the gaskets and other components, or just the impeller?
A: Always replace gaskets, grommets, and the drive key during impeller service to ensure a proper seal and prevent future leaks. This kit includes all necessary components for a complete, reliable rebuild.

Q: Is this an OEM part 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.