Water Pump Impeller with Key – Fits Select Yamaha 8–20 HP Outboards (Replaces 63V-44352-01-00)
Water Pump Impeller with Key – Fits Select Yamaha 8–20 HP Outboards (Replaces 63V-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.
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Water Pump Impeller with Key – Fits Select Yamaha 8–20 HP Outboards...
Water Pump Impeller with Key – Fits Select Yamaha 8–20 HP Outboards (Replaces 63V-44352-01-00) is backordered and will ship as soon as it is back in stock.
Product Details
This is an aftermarket replacement water pump impeller with key for selected Yamaha outboards. It is designed for the listed Yamaha T8, 9.9 HP, 15 HP, and 20 HP applications, including the FT8D, FT8G, F9.9C, FT9.9D, FT9.9G, F9.9H, FT9.9L, F15A, F15C, and F20B models, as well as the listed 15FMH-series applications. Confirm your exact model and serial number before ordering.
The six-blade impeller is made for water-pump service and helps maintain the cooling-water flow required for normal outboard operation. The package includes one impeller and one matching impeller key.
- Product type: Water pump impeller with key
- Installation: Direct replacement for the original impeller assembly
- Blades: 6
- Impeller outside diameter: 53 mm
- Impeller shaft insert diameter: 12.85 mm
- Impeller width: 14 mm
Part Number Matrix
Use the references below to compare the impeller with your original part and confirm compatibility.
| Brand | Part Number | Reference Type |
|---|---|---|
| Yamaha | 63V-44352-01-00 | OEM reference |
| Yamaha | 63V-44352-00-00 | Earlier OEM reference |
| Sierra | 18-3040 | Aftermarket interchange reference |
| GLM Marine | 89619 | Aftermarket interchange reference |
| Mallory | 9-45607 | Aftermarket interchange reference |
| Parsun | ASP500363 | Aftermarket interchange reference |
Engine & Model Compatibility
Fitment depends on the complete engine model and serial-number range. The applications below reflect the listed product fitment; horsepower alone is not sufficient to confirm compatibility.
| Brand | Model or Model Family | Rated HP | Stroke | Year / Serial Condition | OEM Reference |
|---|---|---|---|---|---|
| Yamaha | FT8D, FT8G | 8 | Verify for exact model | Not specified; verify model and serial number | 63V-44352-01-00 / 63V-44352-00-00 |
| Yamaha | F9.9C, FT9.9D, FT9.9G, F9.9H, FT9.9L | 9.9 | Verify for exact model | Not specified; verify model and serial number | 63V-44352-01-00 / 63V-44352-00-00 |
| Yamaha | F15A, F15C | 15 | Verify for exact model | Not specified; verify model and serial number | 63V-44352-01-00 / 63V-44352-00-00 |
| Yamaha | F20B | 20 | Verify for exact model | Not specified; verify model and serial number | 63V-44352-01-00 / 63V-44352-00-00 |
| Yamaha | 15FMH-series applications listed by the supplier | 15 | Verify for exact model | Not specified; verify model and serial number | 63V-44352-01-00 / 63V-44352-00-00 |
Catalog records also show this impeller reference in selected Yamaha 9.9 HP and 15 HP two-stroke applications and selected F15 four-stroke applications. Always compare the original impeller dimensions, key arrangement, model code, and serial-number range before installation.
Technical Specifications
- Product Type
- Water pump impeller with key
- Installation
- Direct replacement
- Number of Blades
- 6
- Impeller Outside Diameter
- 53 mm
- Impeller Shaft Insert Diameter
- 12.85 mm
- Impeller Width
- 14 mm
- Material
- Rubber impeller material; verify material details against the supplied product before installation
What’s in the Box
- 1 x Water pump impeller
- 1 x Impeller key
This listing is for the impeller-and-key set only. Water-pump housing components, wear plates, gaskets, seals, bolts, and other repair-kit parts are not included unless specifically listed above.
Installation Notes
- Disconnect the battery and remove the emergency-stop lanyard. Follow the engine manufacturer's safety instructions.
- Place the outboard in neutral and remove the lower-unit fasteners.
- Lower the gearcase carefully, disconnecting the shift linkage if required by your engine model.
- Remove the water-pump housing and inspect the housing, wear plate, seals, and gaskets for scoring, distortion, corrosion, or damage.
- Remove the old impeller and key. Clean the shaft and pump components before reassembly.
- Install the supplied key securely in the driveshaft keyway, then install the new impeller over the key.
- Lubricate the impeller and pump housing with a suitable water-based assembly lubricant or soap-and-water solution. Do not use petroleum-based grease on the rubber impeller.
- Reinstall the pump housing and any serviceable gaskets or seals according to the engine service manual. Replace damaged sealing components as necessary.
- Reattach the lower unit, aligning the driveshaft, water tube, and shift linkage.
- Test the engine in an appropriate water supply and confirm a steady tell-tale stream before normal operation.
Installation procedures vary by model. If you are not familiar with lower-unit or water-pump service, professional installation is recommended.
Troubleshooting & FAQ
How do I confirm fitment for my Yamaha outboard?
Check the complete engine model code, serial number, original impeller dimensions, and key arrangement. The listed applications include selected Yamaha T8, 9.9 HP, 15 HP, and 20 HP models, but not every engine in those horsepower ranges is automatically compatible.
Does this listing include the impeller key?
Yes. This product is supplied as one water pump impeller with one matching impeller key.
What are the signs of a failing water-pump impeller?
Common signs include a weak or missing tell-tale stream, an overheating warning, rising operating temperature, or steam from the exhaust. Stop the engine promptly if overheating is suspected.
Should I replace the housing and gaskets at the same time?
Inspect the housing, wear plate, gaskets, seals, and related hardware during impeller replacement. Replace any part that is scored, warped, corroded, hardened, torn, or otherwise damaged. This listing does not include a complete water-pump repair kit.
How often should the impeller be replaced?
Replacement intervals depend on operating hours, storage conditions, and water quality. Inspect the impeller during scheduled maintenance and replace it when the manufacturer's service interval is reached or when wear, cracking, deformation, or reduced water flow is found.
Is this an OEM Yamaha part?
No. This is an aftermarket replacement that references Yamaha OEM part numbers 63V-44352-01-00 and 63V-44352-00-00. Yamaha is a trademark of its respective owner, and this product is not manufactured by Yamaha.
What lubricant should be used during installation?
Use a suitable water-based assembly lubricant or soap-and-water solution to ease installation and provide initial lubrication. Avoid petroleum-based grease because it can damage rubber impeller material.
Shipping speed and cost
Typical transit is 5–15 days for standard international shipping. Shipping options and delivery estimates are shown at checkout where available.
Warranty and returns
This product is covered by the applicable store warranty against manufacturing defects under normal use. Returns are accepted according to the store's current return policy; contact support with your order details for instructions.
Safety & Important Information
- Confirm the complete engine model, serial number, dimensions, and key arrangement before purchase.
- Do not operate an outboard if the tell-tale stream is weak or absent, or if an overheating warning occurs.
- Replace damaged pump-housing components, gaskets, seals, or wear plates before returning the engine to service.
- This is an aftermarket replacement, not an OEM Yamaha component.
- Professional installation is recommended for safety and reliable cooling-system performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine replacement parts selected for dependable service in real-world operating conditions.
- Fast Global Fulfillment — Standard delivery options are available to many regions.
- Manufacturer-Direct Value — Fair pricing with attention to fit, dimensions, and application details.
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