Water Pump Impeller – Fits Yamaha 8-20HP (Replaces 63V-44352-01, 63V-44352-00)
Water Pump Impeller – Fits Yamaha 8-20HP (Replaces 63V-44352-01, 63V-44352-00) 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 – Fits Yamaha 8-20HP (Replaces 63V-44352-01, 63...
Water Pump Impeller – Fits Yamaha 8-20HP (Replaces 63V-44352-01, 63V-44352-00) is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Impeller – Fits Yamaha 8HP, 9.9HP, 15HP, 20HP (Replaces 63V-44352-01, 63V-44352-00) is designed for a wide range of Yamaha 2-stroke and 4-stroke outboard engines from 8 to 20 HP, including models like the F8, F9.9, F15, and F20 manufactured between 1984 and 2005. It serves as a vital component for maintaining your engine's cooling system for optimal performance.
This part offers direct interchange with Yamaha OEM part numbers 63V-44352-01 and 63V-44352-00-00, as well as aftermarket equivalents Sierra 18-3040 and Full Power Plus 6E0-44352-00.
- Installation: Mounts inside the lower unit water pump housing.
- Material: Engineered from high-strength neoprene rubber for durability and chemical resistance.
- Warranty: Includes a 6-month warranty against manufacturing defects.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Yamaha | 63V-44352-01 |
| Yamaha | 63V-44352-00-00 |
| Sierra | 18-3040 |
| Full Power Plus | 6E0-44352-00 |
Engine & Model Compatibility
Confirm your engine model and year in the table below to ensure accurate fitment.
| Brand | Model | Rated HP | Stroke | OEM Part No. |
|---|---|---|---|---|
| Yamaha | Outboard | 8 | 2-Stroke | 63V-44352-01 |
| Yamaha | Outboard | 9.9 | 2-Stroke | 63V-44352-01 |
| Yamaha | Outboard | 15 | 2-Stroke | 63V-44352-01 |
| Yamaha | Outboard | 20 | 2-Stroke | 63V-44352-01 |
| Yamaha | F8 | 8 | 4-Stroke | 63V-44352-01 |
| Yamaha | F9.9 | 9.9 | 4-Stroke | 63V-44352-01 |
| Yamaha | F15 | 15 | 4-Stroke | 63V-44352-01 |
| Yamaha | F20 | 20 | 4-Stroke | 63V-44352-01 |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Lower Unit Water Pump
- Material
- Neoprene Rubber
- Color
- Black
- Operating Temperature
- -40°C to +300°C (-40°F to 572°F)
- Warranty
- 6 months
- Durometer Hardness
- 30-95 Shore A
What’s in the Box
- 1 x Water Pump Impeller (63V-44352-01)
Installation Notes
- Disconnect the engine's battery and shift the outboard into neutral.
- Place a drain pan under the lower unit and remove the gearcase oil drain screw to empty the oil.
- Unbolt and carefully detach the lower unit from the upper engine casing.
- Locate and unbolt the water pump housing to expose the old impeller.
- Note the rotational direction of the old impeller's blades before removing it from the driveshaft.
- Clean the interior of the pump housing and inspect the wear plate for scoring or damage.
- Slide the new impeller onto the driveshaft. Rotate the driveshaft clockwise while pressing down to correctly fold the blades into the housing.
- Reinstall the water pump housing, ensuring a proper seal.
- Reattach the lower unit to the engine, making sure the driveshaft and water tube align.
- Refill the gearcase with the correct marine gear lubricant.
- Once fully assembled, start the engine in water and confirm a steady stream from the tell-tale outlet.
Troubleshooting & FAQ
How do I know if this impeller fits my exact engine model?
Please review the Engine & Model Compatibility table on this page. While this impeller fits a broad range of Yamaha 8-20HP models from 1984–2005, it is critical to verify your specific model and year against the chart. When in doubt, compare the photos and part numbers to your original part.
What are common signs that an impeller needs replacement?
The most common signs of a worn or failed impeller are a weak or non-existent water stream from the engine's tell-tale outlet, and your engine overheating, which may trigger an alarm. Reduced cooling efficiency can cause severe engine damage.
How often should a water pump impeller be replaced?
As a preventative maintenance item, most manufacturers recommend replacing the impeller every 1-2 years or every 100-200 hours of operation, whichever comes first. Usage in saltwater or sandy/silty conditions may require more frequent changes.
Is this a complete water pump repair kit?
No, this listing is for the water pump impeller only. It does not include the housing, gaskets, wear plate, or bolts that are typically found in a complete repair kit.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility. All parts are batch-inspected for quality and consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options will appear at checkout where available for your location.
Warranty & returns
This product is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, contact our support team with your order details. Returns are accepted within our standard window, provided the item is unused and in its original condition. Please see our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchasing. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement part, not an original equipment manufacturer (OEM) component.
- Professional installation is highly recommended for safety and to ensure optimal performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world conditions.
- Fast Global Fulfillment — We offer free standard delivery to most regions with an average transit time of 5–15 days.
- Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.
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