Water Pump Impeller Kit – Fits Yamaha 9.9HP 15HP 2-Stroke (Replaces Yamaha 682-44352-00, Sierra 18-3074)
Water Pump Impeller Kit – Fits Yamaha 9.9HP 15HP 2-Stroke (Replaces Yamaha 682-44352-00, Sierra 18-3074) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Water Pump Impeller Kit – Fits Yamaha 9.9HP 15HP 2-Stroke (Replaces...
Water Pump Impeller Kit – Fits Yamaha 9.9HP 15HP 2-Stroke (Replaces Yamaha 682-44352-00, Sierra 18-3074) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Impeller Kit – Fits Yamaha 9.9HP 15HP 2-Stroke (Replaces 682-44352-00, Sierra 18-3074) is designed for Yamaha 2-stroke 9.9HP and 15HP outboard motors, including specific compatibility with E9.9D and E15D models. It serves as a complete solution for servicing your engine's cooling system.
It provides a direct interchange for Yamaha parts 682-44352-00-00 through 682-44352-40-00, Sierra 18-3074, Mallory 9-45605, Mercury 47-84027M/T & 47-96619M, and GLM 89880.
- Installation Method: Direct replacement for a straightforward installation.
- Durable Materials: Features a neoprene rubber impeller and stainless steel hardware for longevity in marine environments.
- Installation Tip: For a smooth installation, lubricate the impeller with silicone grease, glycerin, or dish soap.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 682-44352-00-00 |
| Yamaha | 682-44352-01-00 |
| Yamaha | 682-44352-02-00 |
| Yamaha | 682-44352-03-00 |
| Yamaha | 682-44352-40-00 |
| Sierra | 18-3074 |
| Mallory | 9-45605 |
| Mercury | 47-84027M |
| Mercury | 47-84027T |
| Mercury | 47-96619M |
| GLM | 89880 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This kit is verified for the following Yamaha outboard models.
| Brand | Model | Rated HP | Stroke | OEM Part No. |
|---|---|---|---|---|
| Yamaha | E9.9D | 9.9 | 2-Stroke | 682-44352-00-00 |
| Yamaha | E15D | 15 | 2-Stroke | 682-44352-00-00 |
Technical Specs
- Product Type
- Water Pump Impeller Repair Kit
- Installation
- Direct replacement
- Material
- Neoprene Rubber (Impeller), Stainless Steel (Hardware)
- Compatible Engine Type
- 2-Stroke Outboard
- Weight
- 0.05 kg (0.11 lb)
What’s in the Box
- 1 x Impeller (682-44352-00)
- 1 x Damper Water Seal (682-44365-00)
- 2 x Gasket (682-44315-00)
- 1 x Outer Plate (682-44323-00)
- 1 x Key (90280-03024)
Installation Notes
- Installation is a direct replacement process. Ensure the engine is turned off and disconnected from the power source before starting.
- During assembly, lubricate the new impeller with silicone grease, glycerin, or dish soap to prevent damage and ensure a proper seal.
Troubleshooting & FAQ
How do I confirm this kit fits my Yamaha engine?
This kit is designed for Yamaha 9.9HP and 15HP 2-Stroke outboards, specifically models E9.9D and E15D. The most reliable way to confirm fitment is by matching your existing part number to one of the cross-reference numbers listed in the Part Number Matrix, such as Yamaha 682-44352-00 or Sierra 18-3074.
What are the signs of a worn or failing water pump impeller?
Common symptoms include the engine overheating at idle or low speeds, a weak or non-existent water stream from the "telltale" outlet, and visible cracks, brittleness, or worn-down blades on the old impeller upon inspection.
How often should I replace my outboard's impeller?
As a general maintenance guideline, it's recommended to inspect your water pump impeller annually and replace it every 1-2 years or every 100-200 hours of use, whichever comes first. Usage in saltwater or sandy/silty conditions may require more frequent replacement.
Is this a complete kit for a water pump service?
Yes, this kit includes all the essential components for a standard water pump rebuild: the impeller, gaskets, outer plate, damper seal, and key. Please check the "What's in the Box" section to see all included parts.
Do I need special tools for this installation?
Standard mechanical tools are typically sufficient. You will need to remove the lower unit of the outboard to access the water pump housing. No proprietary tools are generally required for this type of service.
What's the difference between OEM and aftermarket parts?
This listing is an aftermarket replacement (not OEM). It's built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility. Each batch is inspected for consistency and quality.
How fast is shipping?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free, and expedited options may be available at checkout depending on your location.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal operating use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in their original condition.
Safety & Important Info
- Verify images and specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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