Water Pump Impeller – Fits Yamaha 9.9-15 HP Outboards (Replaces 63V-44352-01-00, 6E5-44352-01-00)
Water Pump Impeller – Fits Yamaha 9.9-15 HP Outboards (Replaces 63V-44352-01-00, 6E5-44352-01-00) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
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Water Pump Impeller – Fits Yamaha 9.9-15 HP Outboards (Replaces 63V...
Water Pump Impeller – Fits Yamaha 9.9-15 HP Outboards (Replaces 63V-44352-01-00, 6E5-44352-01-00) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Impeller – Fits Yamaha 9.9-15 HP Outboards is a crucial component for engine cooling system maintenance. Designed for both 2-stroke and 4-stroke Yamaha models from 1984 to the present, it helps prevent engine overheating by ensuring proper water circulation.
It serves as a direct replacement for Yamaha parts 63V-44352-01-00 and 6E5-44352-01-00, as well as several aftermarket equivalents from Quicksilver and Sierra.
- Installation Location: Mounts inside the lower unit water pump housing.
- Preventative Maintenance: Replace every 2-3 years to maintain cooling efficiency and prevent engine damage.
- Core Component: Package contains the impeller only; hardware and housing are sold separately.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 63V-44352-01-00 |
| Yamaha | 6E5-44352-01-00 |
| Yamaha | 682-W0078-00 |
| Quicksilver | 8M6010335 |
| Sierra | 18-3040 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | F9.9 | 9.9 | 4-Stroke | 63V-44352-01-00/6E5-44352-01-00 | |
| Yamaha | FT9.9 | 9.9 | 4-Stroke | 63V-44352-01-00/6E5-44352-01-00 | |
| Yamaha | T9.9 | 9.9 | 4-Stroke | 63V-44352-01-00/6E5-44352-01-00 | |
| Yamaha | 15C | 15 | 4-Stroke | 63V-44352-01-00/6E5-44352-01-00 | |
| Yamaha | 9.9D/E9.9D | 9.9 | 2-Stroke | 1984–1995 | 682-W0078-00/682-W0078-01/682-W0078-A1/682-W0078-A2/682-W0078-A3 |
| Yamaha | 15D/E15D | 15 | 2-Stroke | 1984–1995 | 682-W0078-00/682-W0078-01/682-W0078-A1/682-W0078-A2/682-W0078-A3 |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Lower Unit Water Pump
- Material
- High-Quality Rubber
- Blade Configuration
- 6-Blades
- Replacement Interval
- Every 2-3 years (per manufacturer recommendation)
What’s in the Box
- 1 x Water Pump Impeller (Replaces 63V-44352-01-00/6E5-44352-01-00)
Installation Notes
- Disconnect the battery and shift the outboard into neutral.
- Remove the lower unit (gearcase) bolts and carefully separate it from the upper casing.
- Locate and unbolt the water pump housing cover to expose the old impeller.
- Note the rotational direction of the existing impeller blades before removing it.
- Clean the housing interior and install the new impeller, ensuring the blades are oriented correctly.
- Reassemble the water pump housing, apply new gaskets if needed (sold separately), and remount the lower unit.
Troubleshooting & FAQ
What engines does this impeller fit?
This impeller is designed for a wide range of Yamaha 9.9 HP and 15 HP outboards, including both 2-stroke and 4-stroke models from 1984 to present. Please check the compatibility table for specific models.
How often should I replace the water pump impeller?
For preventative maintenance, most marine mechanics and manufacturers recommend replacing the impeller every 2 to 3 years, or sooner if operating in sandy or debris-heavy water.
What are the signs of a failing impeller?
Common symptoms include a weak or non-existent water stream from the "telltale" outlet, engine overheating alarms, or a noticeable decrease in cooling performance.
Where is this part installed?
The impeller is located inside the water pump housing on the lower unit (gearcase) of your outboard motor.
Does this kit include gaskets or the housing?
This listing is for the impeller only. Gaskets, wear plates, and the housing must be purchased separately. We recommend inspecting these components during impeller replacement.
Is this a genuine Yamaha part?
This is a high-quality aftermarket replacement, not an OEM part. It is engineered to meet or exceed original equipment specifications for fit, form, and function.
How fast is shipping?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free, with expedited options available at checkout for most regions.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If you encounter an issue, please contact our support team with your order details. Returns are accepted for unused items in their original condition per our standard return policy.
Safety & Important Info
- Verify images/specifications vs 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.
Payment & Security
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