Water Pump Impeller – Fits Yamaha 8–20 HP 2 & 4 Stroke Outboards (Replaces 63V-44352-01-00)
Water Pump Impeller – Fits Yamaha 8–20 HP 2 & 4 Stroke Outboards (Replaces 63V-44352-01-00) is backordered and will ship as soon as it is back in stock.
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Water Pump Impeller – Fits Yamaha 8–20 HP 2 & 4 Stroke Outboard...
Water Pump Impeller – Fits Yamaha 8–20 HP 2 & 4 Stroke Outboards (Replaces 63V-44352-01-00) is backordered and will ship as soon as it is back in stock.
Product Details
This is a direct replacement Water Pump Impeller – Fits Yamaha 8–20 HP 2 & 4 Stroke Outboards (Replaces 63V-44352-01-00). It is designed for select Yamaha 2-Stroke 9.9–15 HP models (1996–2001) and Yamaha 4-Stroke 8–20 HP models, including T8, T9.9, F9.9, F15, and F20 (1998–2021). Its durable, 6-blade design ensures reliable cooling performance.
This part provides a direct interchange for Yamaha OEM part 63V-44352-01-00 (superseding 63V-44352-00-00) and aftermarket numbers including Sierra 18-3040, Mallory 9-45607, and GLM Marine 89619.
- Method: Direct Replacement
- Material: High-strength Rubber/Neoprene
- Blades: 6
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Yamaha | 63V-44352-01-00 | Current OEM part |
| Yamaha | 63V-44352-00-00 | Superseded by 63V-44352-01-00 |
| Sierra | 18-3040 | Aftermarket Interchange |
| Mallory | 9-45607 | Aftermarket Interchange |
| GLM Marine | 89619 | Aftermarket Interchange |
| SEI Marine | 96-499-03E | Aftermarket Interchange |
| Red Rhino | YA-107 | Aftermarket Interchange |
| CEF | 500363 | Aftermarket Interchange |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Yamaha owners, please verify your engine's model, horsepower, and year range to ensure correct fitment. This impeller fits both 2-stroke and 4-stroke applications as listed.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | 9.9 | 9.9 | 2-Stroke | 1996–2001 | 63V-44352-01-00 | Supersedes 63V-44352-00-00 |
| Yamaha | 15 | 15 | 2-Stroke | 1996–1998 | 63V-44352-01-00 | Supersedes 63V-44352-00-00 |
| Yamaha | T8 | 8 | 4-Stroke | 2002–2009 | 63V-44352-01-00 | Supersedes 63V-44352-00-00 |
| Yamaha | T9.9 | 9.9 | 4-Stroke | 2005–2021 | 63V-44352-01-00 | Supersedes 63V-44352-00-00 |
| Yamaha | F9.9 | 9.9 | 4-Stroke | 2005 | 63V-44352-01-00 | Supersedes 63V-44352-00-00 |
| Yamaha | F15 | 15 | 4-Stroke | 1998–2021 | 63V-44352-01-00 | Supersedes 63V-44352-00-00 |
| Yamaha | F20 | 20 | 4-Stroke | 2006–2021 | 63V-44352-01-00 | Supersedes 63V-44352-00-00 |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Direct Replacement
- Number of Blades
- 6
- Material
- Rubber/Neoprene
- Height
- 14.22 mm (0.56 in)
- Overall Diameter
- 52.83 mm (2.08 in)
- Shaft Diameter
- 13 mm (0.51 in)
- Weight
- 14 g (0.49 oz)
- Color
- Black
What’s in the Box
- 1 x Water Pump Impeller (63V-44352-01-00)
Installation Notes
- Disconnect the battery and spark plug wires for safety.
- Place the outboard in neutral and remove the lower unit (gearcase) bolts.
- Carefully lower and remove the gearcase, disconnecting the shift shaft if necessary.
- Locate the water pump housing on top of the gearcase and remove its bolts.
- Slide the housing up to expose the old impeller. Note the direction of the old blades.
- Remove the old impeller, key, and any gaskets from the driveshaft.
- Lightly grease the new impeller and install it onto the driveshaft, ensuring the blades are oriented correctly (typically clockwise).
- Reinstall the water pump housing, gaskets, and faceplate.
- Reattach the lower unit to the engine, aligning the driveshaft, water tube, and shift shaft.
- Once reassembled, test the engine in water to confirm proper water flow from the tell-tale outlet.
Troubleshooting & FAQ
How do I know this impeller fits my specific Yamaha outboard?
The best way to confirm fitment is to check your engine's model and serial number against the compatibility table provided. This impeller fits a wide range of Yamaha 2-stroke (9.9-15 HP) and 4-stroke (8-20 HP) models. Always verify your OEM part number (63V-44352-01-00 or 63V-44352-00-00) if possible.
What are the signs of a failing water pump impeller?
Common signs include a weak or non-existent water stream from the "tell-tale" outlet, engine overheating alarms, and in severe cases, steam from the exhaust. Reduced cooling efficiency is the primary indicator.
How often should I replace my impeller?
For preventative maintenance, it is recommended to replace the impeller every 1-2 years or every 100-200 hours of use, whichever comes first. Usage in saltwater or sandy/murky water may require more frequent changes.
Is any special grease required for installation?
Yes, applying a thin layer of marine-grade grease or a soap-and-water solution to the inside of the pump housing and the impeller blades can ease installation and provide a good initial seal. Do not use petroleum-based grease, as it can damage the rubber.
Can I reuse the old water pump housing and gaskets?
It is highly recommended to inspect the water pump housing, wear plate, and gaskets for scoring, warping, or corrosion. For a complete and reliable repair, consider using a full water pump repair kit that includes these components, especially if they show signs of wear.
What is the main difference between this impeller and the OEM version?
This aftermarket impeller is engineered to meet or exceed OEM specifications for fit, material, and performance. The primary difference is the price point. It offers a cost-effective solution without compromising on the quality and durability required for reliable engine cooling.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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