Water Pump Impeller for Yamaha 9.9–20 HP Outboards – Replaces 63V-44352-01-00
Water Pump Impeller for Yamaha 9.9–20 HP Outboards – Replaces 63V-44352-01-00 is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
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.
Tracking information will be provided once your order ships.
Water Pump Impeller for Yamaha 9.9–20 HP Outboards – Replaces 63V-4...
Water Pump Impeller for Yamaha 9.9–20 HP Outboards – Replaces 63V-44352-01-00 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket water pump impeller is designed for specified Yamaha 2-stroke and 4-stroke outboard applications. It is a replacement impeller for the lower-unit water pump and uses a six-blade design with a 12.85 mm inside diameter, 53 mm outside diameter, and 14 mm width.
The impeller is listed for Yamaha OEM references 63V-44352-00, 63V-44352-01, 63V-44352-00-00, and 63V-44352-01-00. Listed aftermarket references include Sierra 18-3040, GLM 89619, Mallory 9-45607, and Parsun ASP500363. Mercury Marine references listed for this product are 8M6014002 and 8M6010335.
- Replacement impeller for the outboard water pump assembly.
- Six-blade configuration.
- Verify the dimensions and part-number references before ordering.
- Install in the lower unit according to the engine service manual.
Part Number Matrix
Use the following references to compare the replacement impeller with your existing part and service documentation.
| Brand | Part Number | Reference Type |
|---|---|---|
| Yamaha | 63V-44352-00 | OEM reference |
| Yamaha | 63V-44352-01 | OEM reference |
| Yamaha | 63V-44352-00-00 | OEM reference |
| Yamaha | 63V-44352-01-00 | OEM reference |
| Sierra | 18-3040 | Aftermarket reference |
| GLM | 89619 | Aftermarket reference |
| Mallory | 9-45607 | Aftermarket reference |
| Parsun | ASP500363 | Aftermarket reference |
| Mercury Marine | 8M6014002 | Listed reference |
| Mercury Marine | 8M6010335 | Listed reference |
Engine & Model Compatibility
Fitment depends on the exact engine model and water-pump configuration. Keep horsepower, stroke, model designation, and serial or year information together when checking compatibility.
| Brand | Model or Application | Rated HP | Stroke | Year or Scope | OEM Reference |
|---|---|---|---|---|---|
| Yamaha | 9.9F, 15F, 15MSHC | 9.9–15 HP | 2-Stroke | Exact model and serial verification required | 63V-44352-00 / 63V-44352-01 |
| Yamaha | FT8D, FT8G, F9.9C, FT9.9D, FT9.9G, F9.9H, FT9.9L, F15A, F15C, F20B, 15FMH1, 5FMHS | 5–20 HP | 4-Stroke | 1984 and later Yamaha 4-stroke outboards, subject to exact model verification | 63V-44352-00-00 / 63V-44352-01-00 |
The company fitment records do not establish a complete Mercury or Mariner engine-model, year, stroke, or serial-number range. Do not rely on a general horsepower match alone for those applications.
Technical Specs
- Product Type
- Outboard water pump impeller
- Application
- Specified Yamaha 2-stroke and 4-stroke outboards
- Number of Blades
- 6
- Inside Diameter
- 12.85 mm
- Outside Diameter
- 53 mm
- Width
- 14 mm
- Installation Location
- Lower-unit water pump assembly
What’s in the Box
- 1 x Water pump impeller
This is a single replacement impeller. A water-pump key, gasket, housing, wear plate, and other water-pump components are not included unless separately stated for the order.
Installation Notes
- Confirm the engine model, stroke, year or serial range, and existing impeller dimensions before beginning work.
- Disconnect the battery and place the outboard in neutral.
- Remove the lower unit according to the engine service manual.
- Remove the water-pump housing cover and old impeller, noting the original vane direction.
- Inspect the housing, wear plate, key, gasket, and related components for wear or damage.
- Install the replacement impeller with the correct key and vane orientation. Do not force the impeller or operate it dry.
- Reinstall the housing and lower unit using the manufacturer's torque specifications.
- Run the engine only in an appropriate water supply and confirm a steady cooling-water tell-tale stream before normal operation.
Troubleshooting & FAQ
How do I confirm this impeller fits my engine?
Compare your engine's complete model designation, stroke, year or serial information, existing impeller dimensions, and OEM reference with the information on this page. The correct horsepower alone is not sufficient to confirm fitment.
What are the signs of a failing impeller?
A weak or missing tell-tale stream, overheating alarm, rising engine temperature, or steam may indicate a cooling-system problem. Stop the engine if overheating or loss of cooling water is suspected.
How often should the impeller be replaced?
Replacement intervals vary by engine manufacturer, operating hours, and water conditions. Follow the owner's or service manual. Inspect the impeller regularly, especially after operation in saltwater, sand, silt, or debris.
Does this product include the water-pump key?
No. This listing is for one impeller only. The key and other water-pump service parts are not included unless specifically listed with the order.
Is this an OEM part?
No. This is an aftermarket replacement impeller that references the Yamaha and aftermarket part numbers listed above. Yamaha, Sierra, GLM, Mallory, Parsun, and Mercury Marine are referenced for identification only; this listing is not presented as a genuine OEM product.
Is professional installation recommended?
Yes, if you are not experienced with outboard lower-unit service. Impeller replacement requires access to the water-pump assembly and correct reassembly of the gearcase and cooling system.
Shipping speed and cost
Shipping options, delivery estimates, and cost are shown at checkout based on the destination and selected service.
Warranty and returns
Warranty coverage and return eligibility are governed by the applicable store policies. Contact support with your order details if you need assistance.
Safety & Important Info
- Verify the complete engine model, stroke, year or serial information, and impeller dimensions before ordering.
- Do not run the impeller dry; lack of water can damage the impeller and cooling system.
- Inspect the water-pump housing, wear plate, key, gasket, and related parts during installation.
- This is an aftermarket replacement, not a genuine OEM component.
- Professional installation is recommended when lower-unit service is outside your experience.
About Sea Sierra
- Marine Replacement Parts — Practical replacement components for outboard maintenance and repair.
- Fitment-Focused Listings — Part-number references and application details help you compare before ordering.
- Customer Support — Contact our team with your engine information and order details when you need assistance.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
