Water Pump Impeller for Yamaha F300A/F350A V8 Outboards – Replaces 6AW-44352-00-00
Water Pump Impeller for 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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Water Pump Impeller for Yamaha F300A/F350A V8 Outboards – Replaces ...
Water Pump Impeller for Yamaha F300A/F350A V8 Outboards – Replaces 6AW-44352-00-00 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket water pump impeller is designed for Yamaha V8 F300A and F350A 4-Stroke outboard applications from 2006 onward. It is a replacement cooling-system impeller intended to maintain water circulation through the outboard water pump.
The impeller replaces Yamaha OEM part number 6AW-44352-00-00. Catalog references also identify the corresponding aftermarket numbers as Sierra 18-8925 and GLM 89960.
- Single replacement water pump impeller.
- For Yamaha V8 F300A and F350A 4-Stroke outboards, 2006+.
- High-volume, long-vane impeller design reference.
- Approximate outside diameter: 3.50 in (89 mm).
- Approximate inside diameter: 1.00 in (25.4 mm).
- Aftermarket replacement; not manufactured or branded by Yamaha.
Part Number Matrix
Use the following references to compare the impeller with the part removed from your outboard. Reference numbers do not replace confirmation of the complete engine model and application.
| Brand or source | Part number | Reference |
|---|---|---|
| Yamaha | 6AW-44352-00-00 | OEM replacement reference |
| Sierra Marine | 18-8925 | Aftermarket cross-reference |
| GLM | 89960 | Aftermarket cross-reference |
Engine & Model Compatibility
This impeller is listed for the following application range:
| Brand | Engine family | Rated horsepower | Stroke | Years | Application condition |
|---|---|---|---|---|---|
| Yamaha | F300A | 300 HP | 4-Stroke | 2006+ | V8 outboard; confirm the required OEM reference before installation. |
| Yamaha | F350A | 350 HP | 4-Stroke | 2006+ | V8 outboard; confirm the required OEM reference before installation. |
Model suffixes, production details, and lower-unit configurations can affect fitment. Confirm your engine identification and the required impeller reference before ordering.
Technical Specifications
- Product type
- Water pump impeller
- Product format
- Single impeller
- Application
- Yamaha V8 F300A and F350A 4-Stroke outboards, 2006+
- Replacement OEM reference
- 6AW-44352-00-00
- Aftermarket references
- Sierra 18-8925; GLM 89960
- Impeller style
- High-volume / long-vane design reference
- Outside diameter
- Approximately 3.50 in (89 mm)
- Inside diameter
- Approximately 1.00 in (25.4 mm)
What’s in the Box
- 1 x Water pump impeller
The impeller is sold as a single component. A drive key is not included unless specifically stated by the seller for the purchased item. GLM catalog information identifies the key as a separately ordered component, so inspect and replace the existing key as needed.
Installation Notes
- Confirm the engine model, year, OEM reference, and impeller dimensions before disassembly.
- Disconnect the battery and follow the applicable Yamaha service procedure for lower-unit removal.
- Remove the water-pump cover and inspect the housing, wear surfaces, drive key, and related seals for wear, scoring, corrosion, or damage.
- Remove the old impeller and verify that the drive key and shaft are correctly positioned.
- Clean the pump components and install the replacement impeller in the correct vane direction for the pump rotation.
- Reinstall the cover and related components using the manufacturer’s service-manual torque specifications.
- Reinstall the lower unit, reconnect all linkages, and test the outboard with a reliable water supply.
Professional installation is recommended if you are not experienced with outboard lower-unit and water-pump service.
Troubleshooting & FAQ
How do I confirm that this impeller fits my Yamaha outboard?
Confirm that your engine is a Yamaha V8 F300A or F350A 4-Stroke application from 2006 onward and that the required impeller reference is 6AW-44352-00-00. Also compare the old impeller’s dimensions and keyway arrangement before installation.
What symptoms can indicate a worn water-pump impeller?
Possible symptoms include a weak or missing telltale stream, overheating at idle or low speed, and a high-temperature warning. Stop operating the engine if cooling performance is abnormal and inspect the water-pump system.
Is the drive key included?
No drive key is listed as included with this single impeller. Check the existing key during service and replace it if worn or damaged.
Is this an OEM Yamaha part?
No. This is an aftermarket replacement impeller that references Yamaha OEM part number 6AW-44352-00-00 for application identification.
How often should the impeller be replaced?
Replacement timing depends on the engine manufacturer’s service schedule and operating conditions. Inspect the impeller during scheduled water-pump service and replace it when worn, damaged, hardened, cracked, or otherwise unable to maintain proper cooling flow.
Can I install it myself?
Installation requires water-pump service and lower-unit removal on many applications. Use the correct service manual and tools, or have the work performed by a qualified marine technician.
Safety & Important Information
- Verify the complete engine model, year, OEM reference, dimensions, and key arrangement before purchase.
- This listing is for one impeller only; housing, wear plate, gaskets, seals, and drive key are not included unless separately stated.
- Do not operate the outboard without an adequate water supply.
- This is an aftermarket replacement and is not an OEM Yamaha component.
About Sea Sierra
- Marine replacement parts — Carefully selected components for common outboard service applications.
- Application-focused listings — Product references and fitment details are provided to help you compare the replacement with your original part.
- Customer support — Contact support if you need help comparing the engine model or replacement reference before ordering.
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