Water Pump Impeller – Fits Yamaha F300A/F350A V8 Outboards (Replaces 6AW-44352-00-00)
Water Pump Impeller – Fits Yamaha F300A/F350A V8 Outboards (Replaces 6AW-44352-00-00) 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 Water Pump Impeller – Fits Yamaha F300A/F350A V8 Outboards (Replaces 6AW-44352-00-00) is designed for Yamaha F300A/F350A 5.3L V8 4-Stroke outboard engines from 2006 and newer. It is a critical cooling system component that ensures proper water circulation through the engine.
This part is a direct replacement for Yamaha part numbers 6AW-44352-00-00, 6AW-44352-00, 6AW-44352-01-00 and also interchanges with Sierra 18-8925, CEF500389N, and Red Rhino YA-113.
- Installs as a direct OEM replacement with no modifications needed.
- Engineered with a durable neoprene impeller for reliable performance in marine environments.
- Includes one water pump impeller assembly for a complete swap.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Yamaha | 6AW-44352-00-00 |
| Yamaha | 6AW-44352-00 |
| Yamaha | 6AW-44352-01-00 |
| Sierra | 18-8925 |
| Sierra | CEF500389N |
| Red Rhino | YA-113 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This impeller is compatible with a wide range of Yamaha V8 5.3L 4-Stroke outboards, including models from 2006 and newer.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Yamaha | F300A | 300 | 4-Stroke | 2006+ | 6AW-44352-00-00 | V8 5.3L |
| Yamaha | F350A | 350 | 4-Stroke | 2006+ | 6AW-44352-00-00 | V8 5.3L |
| Yamaha | F300TUR | 300 | 4-Stroke | 2007–2009 | 6AW-44352-00-00 | V8 |
| Yamaha | F300TXR | 300 | 4-Stroke | 2007–2009 | 6AW-44352-00-00 | V8 |
| Yamaha | LF300TUR | 300 | 4-Stroke | 2007–2009 | 6AW-44352-00-00 | V8 |
| Yamaha | LF300TXR | 300 | 4-Stroke | 2007–2009 | 6AW-44352-00-00 | V8 |
| Yamaha | F350TUR | 350 | 4-Stroke | 2007–2009 | 6AW-44352-00-00 | V8 |
| Yamaha | F350TXR | 350 | 4-Stroke | 2007–2009 | 6AW-44352-00-00 | V8 |
| Yamaha | LF350TUR | 350 | 4-Stroke | 2007–2009 | 6AW-44352-00-00 | V8 |
| Yamaha | LF350TXR | 350 | 4-Stroke | 2007–2009 | 6AW-44352-00-00 | V8 |
| Yamaha | F350UCA/XCA | 350 | 4-Stroke | 2010–2011 | 6AW-44352-00-00 | V8 |
| Yamaha | LF350UCA/XCA | 350 | 4-Stroke | 2010–2011 | 6AW-44352-00-00 | V8 |
| Yamaha | F350AET1U/X | 350 | 4-Stroke | 2010 | 6AW-44352-00-00 | V8 |
| Yamaha | FL350AET1U/X | 350 | 4-Stroke | 2010 | 6AW-44352-00-00 | V8 |
| Yamaha | F350UCB/XCB | 350 | 4-Stroke | 2012–2015 | 6AW-44352-00-00 | V8 |
| Yamaha | LF350UCB/XCB | 350 | 4-Stroke | 2012–2015 | 6AW-44352-00-00 | V8 |
| Yamaha | F350NCB | 350 | 4-Stroke | 2014–2015 | 6AW-44352-00-00 | V8 |
| Yamaha | F350UCC/XCC | 350 | 4-Stroke | 2016–2019 | 6AW-44352-00-00 | V8 |
| Yamaha | LF350UCC/XCC | 350 | 4-Stroke | 2016–2019 | 6AW-44352-00-00 | V8 |
| Yamaha | F350NCC | 350 | 4-Stroke | 2016–2019 | 6AW-44352-00-00 | V8 |
| Yamaha | F350NCC2 | 350 | 4-Stroke | 2018–2019 | 6AW-44352-00-00 | V8 |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Direct OEM Replacement
- Material
- Neoprene
- Color
- Black
- Weight
- 88 g (0.19 lb)
- Number of Blades
- 6
- Hub Type
- Plastic
- External Impeller Diameter
- 89 mm (3.50 in)
- Internal Shaft Insert Diameter
- 25 mm (0.98 in)
- Height
- 9.0 in
- Application
- Yamaha F300A/F350A V8 Outboards
- Warranty
- 1 Year (aftermarket)
What’s in the Box
- 1 x Water Pump Impeller (Replaces OEM 6AW-44352-00-00)
Installation Notes
- Disconnect the battery and remove the engine cover.
- Drain the lower unit gear lube.
- Remove the lower unit by unbolting it from the engine's midsection and disconnecting the shift linkage.
- Place the lower unit on a stable workbench.
- Unbolt and remove the water pump housing cover.
- Carefully inspect the housing and wear plate for scoring, warping, or corrosion. Replace if damage is found.
- Remove the old impeller, noting the direction of the vanes.
- Clean the driveshaft and housing interior. Lightly grease the shaft.
- Slide the new impeller onto the driveshaft, turning the shaft clockwise to bend the vanes correctly.
- Apply a thin layer of grease to the inside of the water pump housing.
- Reinstall the housing and torque the bolts to the manufacturer's specification.
- Re-install the lower unit, reconnect shift linkage, refill gear lube, and test the engine with a reliable water supply.
Troubleshooting & FAQ
How do I know if this impeller fits my Yamaha outboard?
Check your engine's model and year against the compatibility list on this page. This part is specifically designed for Yamaha F300A/F350A 5.3L V8 models from 2006 and newer. Always confirm your engine's OEM part number requirement is 6AW-44352-00-00 or one of its superseded versions.
What are the signs of a failing water pump impeller?
Common signs include the engine overheating at idle or low speeds, a weak or non-existent "telltale" water stream from the exhaust port, and a high-temperature alarm sounding. Reduced engine performance may also occur as the ECU limits RPM to prevent damage.
How often should I replace my water pump impeller?
For optimal engine protection and peace of mind, we recommend replacing the impeller every one to two years, or every 100-200 hours of operation. Service interval depends on usage conditions, especially operation in sandy, silty, or saltwater environments which can accelerate wear.
Can I install this impeller myself?
While DIY installation is possible for individuals with strong mechanical experience and the correct tools, it involves removing the lower unit from the outboard. We recommend professional installation to ensure all components are re-assembled and torqued correctly, preventing potential engine damage from improper cooling.
Is there a performance difference between this and the OEM Yamaha part?
This aftermarket impeller is manufactured to meet or exceed original equipment manufacturer (OEM) specifications. It uses a high-quality neoprene compound for durability and performance comparable to the original factory part, ensuring reliable cooling performance.
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.
Payment & Security
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