Water Pump Impeller – Fits Yamaha 8–15HP Outboards (Replaces 63V-44352-01)
Water Pump Impeller – Fits Yamaha 8–15HP Outboards (Replaces 63V-44352-01) is backordered and will ship as soon as it is back in stock.
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Water Pump Impeller – Fits Yamaha 8–15HP Outboards (Replaces 63V-44...
Water Pump Impeller – Fits Yamaha 8–15HP Outboards (Replaces 63V-44352-01) is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket water pump impeller is designed as a replacement for selected Yamaha 8HP, 9.9HP, and 15HP outboard applications. The impeller is a high-pressure, short-vane design used in the engine cooling system to circulate water through the water pump.
It replaces Yamaha OEM part number 63V-44352-01. Catalog references associate this impeller with both 2-stroke and 4-stroke Yamaha applications, so always confirm the complete engine model and service-part number before ordering.
- Aftermarket replacement for the original water pump impeller.
- High-pressure, short-vane impeller design.
- Helps restore proper water circulation and cooling-system performance.
- One impeller supplied; water-pump gaskets, key, housing, cover, and other service parts are not included unless specifically stated.
Part Number Matrix
Use the following reference to compare the impeller with your original part or service manual.
| Brand | Part Number | Application |
|---|---|---|
| Yamaha | 63V-44352-01 | Water pump impeller OEM reference |
| Yamaha | 63V4435201 | Unhyphenated search format for the same reference |
Engine & Model Compatibility
This impeller is listed for selected Yamaha 8HP, 9.9HP, and 15HP outboard applications and may be used in 2-stroke or 4-stroke configurations depending on the exact engine model. Horsepower alone is not sufficient to confirm fitment. Check the full model designation, production details, and the original impeller before installation.
| Brand | Rated HP Range | Stroke | OEM Part No. | Fitment Notes |
|---|---|---|---|---|
| Yamaha | 8HP | 2-stroke or 4-stroke application dependent | 63V-44352-01 | Verify the complete engine model and year. |
| Yamaha | 9.9HP | 2-stroke or 4-stroke application dependent | 63V-44352-01 | Verify the complete engine model and year. |
| Yamaha | 15HP | 2-stroke or 4-stroke application dependent | 63V-44352-01 | Verify the complete engine model and year. |
Technical Specs
- Product Type
- Water pump impeller
- Design
- High-pressure, short-vane impeller
- Material
- Flexible rubber compound
- Color
- Black
- Installation
- Replacement water-pump component
What’s in the Box
- 1 x water pump impeller
Not included: water-pump key, gaskets, O-rings, pump housing, inner cover, outer plate, fasteners, or other water-pump components unless separately stated.
Installation Notes
- Disconnect the battery and place the outboard in neutral.
- Remove the mounting hardware securing the lower unit to the engine.
- Carefully lower and separate the gearcase from the driveshaft housing.
- Remove the water-pump housing cover to access the impeller.
- Remove the old impeller and note the direction of the vanes.
- Inspect the housing, cover, key, plate, seals, and gaskets for wear or damage.
- Install the replacement impeller with the vanes oriented for the correct direction of rotation.
- Reassemble the water-pump components using replacement gaskets or seals where required.
- Reattach the lower unit, ensuring correct alignment of the driveshaft and water tube.
- Tighten all fasteners according to the engine manufacturer’s service specifications.
- Run the outboard with an appropriate water supply and confirm a strong cooling-water tell-tale stream before normal operation.
Troubleshooting & FAQ
How do I confirm that this impeller fits my Yamaha outboard?
Compare the complete engine model, year, and existing impeller with the compatibility information and OEM reference in this listing. The most reliable confirmation is a matching OEM number of 63V-44352-01 in the engine service manual or on the removed part.
What are the signs of a failing water pump impeller?
Common symptoms include a weak or missing tell-tale stream, overheating at idle or low speed, reduced cooling-water flow, and an overheat warning. Stop operating the engine if overheating occurs.
How often should an outboard impeller be inspected?
Inspect the impeller according to the engine manufacturer’s maintenance schedule. Frequent operation in sandy, silty, or saltwater conditions can increase wear and may require more frequent inspection or replacement.
Does this item include a complete water-pump repair kit?
No. This listing is for one water pump impeller only. The key, gaskets, O-rings, housing, cover, and other water-pump components are not included unless specifically listed.
Is this an OEM Yamaha part?
No. This is an aftermarket replacement impeller. Yamaha and the OEM number shown are used only to identify the application and replacement reference.
Can I install the impeller myself?
Impeller replacement requires removal of the lower unit and correct reassembly of the water pump. It may be suitable for an experienced technician or mechanically capable owner; professional installation is recommended if you are unfamiliar with the procedure.
Safety & Important Information
- Confirm the complete engine model, year, stroke, and OEM reference before purchase.
- Compare the replacement impeller with the original part before installation.
- Do not operate an outboard without an adequate water supply for cooling.
- Stop the engine immediately if the tell-tale stream is weak or the engine overheats.
- This is an aftermarket replacement, not an OEM component.
About Sea Sierra
- Marine Replacement Parts — Practical replacement components for routine outboard maintenance.
- Application-Focused Listings — Product information is organized around OEM references and engine compatibility.
- Service-Minded Support — Verify your engine details and original part before ordering for the best fitment result.
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