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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Delivery and Shipping
Delivery and Shipping
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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 F300A and F350A V8 four-stroke outboard applications from 2006 onward. The impeller is a service replacement for the water-pump system and helps maintain the cooling-water flow required for normal engine operation.
It replaces Yamaha OEM part number 6AW-44352-00-00. Catalog references identify the corresponding Sierra Marine impeller as 18-8925 and the corresponding GLM impeller as 89960.
- Aftermarket replacement water pump impeller.
- Single impeller supplied; this is not a complete water pump repair kit.
- Intended for Yamaha F300A and F350A V8 four-stroke outboards, 2006 and newer.
- Confirm the engine model, year and existing OEM part number before ordering.
Part Number Matrix
Use the following references to compare the replacement impeller with the original or an aftermarket catalog listing.
| Brand or Source | Part Number | Reference |
|---|---|---|
| Yamaha | 6AW-44352-00-00 | OEM replacement reference |
| Sierra Marine | 18-8925 | Aftermarket catalog reference |
| GLM | 89960 | Aftermarket catalog reference |
Engine & Model Compatibility
The company fitment record specifies Yamaha V8 F300A and F350A four-stroke outboards from 2006 onward. Engine model codes, production years and serial-number ranges can vary, so verify the identification plate and the part number removed from your engine before installation.
| Brand | Model Family | Rated HP | Engine Type | Years | OEM Part No. | Fitment Note |
|---|---|---|---|---|---|---|
| Yamaha | F300A | 300 | V8, 4-Stroke | 2006+ | 6AW-44352-00-00 | Confirm model code and serial number |
| Yamaha | F350A | 350 | V8, 4-Stroke | 2006+ | 6AW-44352-00-00 | Confirm model code and serial number |
| Yamaha | F300TUR, F300TXR, LF300TUR, LF300TXR | 300 | 4-Stroke | Catalog examples include 2008–2009 | 6AW-44352-00-00 | Catalog occurrences; verify the specific engine |
| Yamaha | F350TUR, F350TXR, LF350TUR, LF350TXR | 350 | 4-Stroke | Catalog examples include 2008–2009 | 6AW-44352-00-00 | Catalog occurrences; verify the specific engine |
Model-family references outside the primary F300A/F350A company fitment should be treated as catalog leads until the exact engine identification and OEM number are confirmed.
Technical Specs
- Product Type
- Water pump impeller
- Construction
- Aftermarket replacement component
- Installation
- Replacement for the water-pump impeller in the applicable engine
- Application
- Yamaha F300A and F350A V8 four-stroke outboards, 2006+
- OEM Replacement Number
- 6AW-44352-00-00
- Aftermarket References
- Sierra Marine 18-8925; GLM 89960
What’s in the Box
- 1 x aftermarket water pump impeller
The impeller is sold as a single replacement component. The key, gaskets, O-rings, housing, wear plate and other water-pump service parts are not included unless specifically stated in the order details.
Installation Notes
- Disconnect the battery, remove the engine cowling and follow the applicable service-manual safety procedures.
- Place the outboard gear shift in the neutral position and support the engine and lower unit securely.
- Remove the lower unit according to the manufacturer’s service procedure.
- Remove the water-pump housing and expose the existing impeller.
- Note the original impeller orientation and remove the impeller and key as required.
- Clean the water-pump mating surfaces and inspect the housing, wear plate, key, gaskets and O-rings for wear or damage.
- Install the replacement impeller using the original or a suitable new key. Use only lubricant approved for marine water-pump installation.
- Reinstall the water-pump housing and related components in the correct orientation, using the manufacturer’s torque specifications.
- Reinstall the lower unit and confirm that the shift linkage and water tube are correctly aligned.
- Start the engine only in an appropriate water supply or with the correct flushing equipment, then verify a strong telltale stream and normal cooling-system operation.
Installation should be performed by a qualified marine technician when the lower unit or water-pump assembly is unfamiliar to the installer.
Troubleshooting & FAQ
How do I know if the water-pump impeller needs replacement?
Possible signs include a weak or absent telltale stream, an overheating warning, reduced cooling performance or visibly cracked, stiff, damaged or missing impeller vanes. Inspect the complete water-pump assembly if cooling flow is poor.
Is the key included with this impeller?
No key is listed as included. This product is supplied as one impeller only. Inspect the existing key and replace it if it is worn or damaged.
Does this include a complete water-pump repair kit?
No. This listing is for a single impeller. A complete repair kit, housing, gaskets, O-rings and other water-pump components are separate parts.
Will this fit my Yamaha F300A or F350A?
The company fitment record specifies V8 Yamaha F300A and F350A four-stroke outboards from 2006 onward. Verify the exact model code, year, serial number and existing OEM part number 6AW-44352-00-00 before ordering.
Is this an OEM Yamaha part?
No. This is an aftermarket replacement impeller intended to replace the Yamaha OEM reference listed above.
Can I use the aftermarket reference numbers to confirm fitment?
Sierra 18-8925 and GLM 89960 are catalog references associated with the same Yamaha OEM replacement number. Use the original engine part number and model identification as the final fitment check.
How often should the impeller be inspected?
Inspect the impeller according to the engine manufacturer’s maintenance schedule and whenever the engine shows signs of reduced cooling flow or overheating. Frequent operation in sandy, silty or saltwater conditions may require more frequent inspection.
Shipping speed and cost
Available shipping methods, delivery estimates and costs are displayed at checkout based on the destination and selected service.
Warranty and returns
Warranty and return eligibility are governed by the current store policies. Contact support with your order details before returning a product.
Safety & Important Information
- Confirm the engine brand, model, year, serial number and existing OEM part number before purchase.
- Do not operate an outboard that is overheating or has inadequate cooling-water flow.
- Inspect associated water-pump components during installation; replacing the impeller alone may not correct damage elsewhere in the cooling system.
- This is an aftermarket replacement, not an OEM Yamaha component.
- Professional installation is recommended when removing the lower unit or servicing the water-pump assembly.
About Sea Sierra
- Marine Replacement Parts — We supply aftermarket marine components for routine service and repair applications.
- Fitment-Focused Listings — Product pages identify applicable engine models and replacement references to support careful part selection.
- Global Fulfillment — Available delivery options and estimated transit times are shown at checkout for the shipping destination.
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