Rubber Impeller – Fits Yamaha 8/9.9/15HP 2-Stroke Outboards (Replaces 63V-44352-01)
Rubber Impeller – Fits Yamaha 8/9.9/15HP 2-Stroke Outboards (Replaces 63V-44352-01) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Product Details
This high-density Rubber Impeller – Fits Yamaha 8/9.9/15HP 2-Stroke Outboards (Replaces 63V-44352-01) is an essential water pump component for your engine's cooling system. It is engineered for a wide range of Yamaha 8HP, 9.9HP, and 15HP 2-Stroke outboards manufactured between 1984 and 2007, as well as select 4-stroke models.
This part serves as a direct replacement for Yamaha OEM part numbers 63V-44352-01-00 and 63V-44352-00-00, along with aftermarket equivalents like Sierra 18-3040 and FINNORD 500363.
- Engineered for direct OEM-fit installation.
- Constructed from durable, high-density rubber resistant to saltwater and chemicals.
- Features a reinforced hub for secure attachment in high-torque applications.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 63V-44352-01-00 | Supersedes 63V-44352-00-00 |
| Sierra | 18-3040 | Aftermarket Interchange |
| FINNORD | 500363 | Aftermarket Interchange |
Engine & Model Compatibility
Confirm your engine model and year in the tables below to ensure proper fitment.
Yamaha Compatibility: Fits a wide range of Yamaha 2-stroke and early model 4-stroke outboards. Also fits select T9.9 high-thrust models. Please verify your specific model and year.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | Outboard | 8 | 2-Stroke | 1984–2007 | 63V-44352-01-00 | Also fits some early model F20 4-strokes |
| Yamaha | Outboard | 9.9 | 2-Stroke | 1984–2007 | 63V-44352-01-00 | |
| Yamaha | Outboard | 15 | 2-Stroke | 1984–2007 | 63V-44352-01-00 | |
| Yamaha | F15/F15C | 15 | 4-Stroke | 1998–2006 | 63V-44352-01-00 | Early model 4-strokes |
| Yamaha | F20A | 20 | 4-Stroke | 2006–2008 | 63V-44352-01-00 | Early model 4-strokes only |
| Yamaha | T9.9 | 9.9 | 4-Stroke | 2005–2006 | 63V-44352-01-00 | Serial numbers starting with 66R |
Parsun & Selva Compatibility: This impeller may serve as an aftermarket fit for certain Parsun and Selva models. Always verify technical specifications against your original part before ordering.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Parsun | Outboard | 9.9 | 2-Stroke | F4-03060000 | Aftermarket fit |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Direct OEM Replacement
- Material
- High-Density Rubber
- Design
- 6-blade star shape with angled blades
- Dimensions
- 53.0 mm outer diameter × 14.0 mm height × 12.85 mm inner diameter
- Color
- Black
- Weight
- 0.04 kg (0.09 lb)
- Corrosion Resistance
- Saltwater and chemical-resistant coating
- Application
- Marine cooling systems
- Other Technical Attributes
- Reinforced hub with secure attachment for high-torque applications
What’s in the Box
- 1 x Impeller (Replaces 63V-44352-01-00)
Installation Notes
- Disconnect the spark plug leads and battery to prevent accidental starting.
- Place the outboard in neutral and remove the lower unit (gearcase) bolts.
- Carefully separate the lower unit from the upper casing to access the water pump.
- Unbolt and remove the water pump housing cover to expose the impeller.
- Remove the old impeller, noting the direction of the blades. Clean any debris from the housing.
- Install the new impeller by rotating the driveshaft clockwise while pushing down.
- Re-install the water pump housing, gaskets, and lower unit.
- Reconnect the battery and test the engine in water to confirm cooling system function.
Troubleshooting & FAQ
How do I know if this impeller fits my specific engine model?
The most reliable method is to check your model and year against the compatibility tables on this page. If you are still unsure, compare the OEM part number (63V-44352-01-00) with the number listed in your engine's service manual.
What are the common signs of a failing water pump impeller?
A weak or non-existent stream of water from the "tell-tale" outlet is the most common sign. Other symptoms include engine overheating alarms, steam from the exhaust, and a reduction in engine performance.
How often should I replace my outboard's impeller?
As a general maintenance rule, it is recommended to replace the impeller every 1-2 years or every 100-200 hours of operation, whichever comes first. This interval can be shorter if you frequently operate in sandy, silty, or saltwater conditions.
Is this a genuine Yamaha OEM part?
No, this is an aftermarket replacement part, not an OEM component. It is designed and manufactured to meet or exceed OEM specifications for fit, form, and function, providing a reliable and cost-effective alternative.
What is the difference between OEM and this aftermarket impeller?
Our aftermarket impellers are built to OEM-level specifications using comparable high-quality, durable materials. They are manufactured in an ISO 9002 certified facility and are batch-inspected for quality and consistency, offering similar performance and longevity to original parts.
How fast do you ship and what does it cost?
We ship worldwide, with most orders arriving within 5–15 days. Standard shipping is free for most regions. Expedited shipping options, if available for your location, will be presented at checkout.
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 any issues, please contact our support team with your order details. Returns are accepted within our standard policy window for unused items in their original condition. See our full policy page or contact us for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchase. If anything differs—even if your model appears compatible—do not install the part.
- This is an aftermarket replacement component, not an original equipment manufacturer (OEM) part.
- Professional installation is highly recommended for safety, performance, and to prevent damage to your engine.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world reliability.
- Fast Global Fulfillment — With free standard delivery to most regions, you can expect your parts in 5–15 days.
- Manufacturer-Direct Value — We deliver fair pricing on high-quality components by eliminating middlemen, without compromising on materials or quality control.
Payment & Security
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