Water Pump Impeller for 2-Stroke 6 HP & 8 HP Outboards – Replaces Yamaha 6G1-44352-00 and Mercury 47-11590M
Water Pump Impeller for 2-Stroke 6 HP & 8 HP Outboards – Replaces Yamaha 6G1-44352-00 and Mercury 47-11590M 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 2-Stroke 6 HP & 8 HP Outboards – Replac...
Water Pump Impeller for 2-Stroke 6 HP & 8 HP Outboards – Replaces Yamaha 6G1-44352-00 and Mercury 47-11590M is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket water pump impeller is designed for selected 2-stroke 6 HP and 8 HP outboards, including Mercury/Mariner 6C, 6D, and 8C applications. It is a six-blade impeller intended to restore water-pump performance when the original impeller is worn, cracked, stiff, or damaged.
The primary OEM reference is Yamaha 6G1-44352-00. The impeller is also cross-referenced with Mercury 47-11590M and selected aftermarket references listed below. Always compare the original impeller dimensions, hub bore, keyway, and engine application before ordering.
- Aftermarket replacement water pump impeller.
- Six-blade design for the specified 2-stroke applications.
- Sold as one impeller; the water-pump key is not included.
- Suitable for routine water-pump service when the application and dimensions match.
Part Number References
These manufacturer and aftermarket numbers are provided as cross-reference identifiers. They are not a substitute for verifying the complete engine application.
| Brand or source | Part number |
|---|---|
| Yamaha OEM | 6G1-44352-00 |
| Mercury OEM | 47-11590M |
| Mercury reference | 11590M |
| Sierra Marine | 18-3066 |
| Mallory Marine | 9-45610 |
| SEI Marine | 96-499-03A |
| GLM | 89870 |
Engine Compatibility
Company fitment information identifies the following selected 2-stroke 6 HP and 8 HP applications. Confirm the model designation and physical dimensions before installation.
| Brand | Model | Rated horsepower | Stroke | Primary reference |
|---|---|---|---|---|
| Mercury / Mariner | 6C | 6 HP | 2-Stroke | 47-11590M |
| Mercury / Mariner | 6D | 6 HP | 2-Stroke | 47-11590M |
| Mercury / Mariner | 8C | 8 HP | 2-Stroke | 47-11590M |
| Yamaha | Selected 6 HP and 8 HP applications | 6–8 HP | 2-Stroke | 6G1-44352-00 |
Model, year, shaft length, serial range, and regional specifications can affect fitment. Do not rely on horsepower alone; compare the original impeller and water-pump assembly before purchase.
Technical Specifications
- Product type
- Water pump impeller
- Application
- Selected 2-stroke 6 HP and 8 HP outboards
- Number of blades
- 6
- Outside diameter
- 1.565 in
- Hub bore diameter
- 0.470 in
- Impeller thickness
- 0.725 in
- Keyway width
- 0.095 in
- Drive key
- Not included
What's in the Box
- 1 x Water pump impeller
Important: The drive key is not included. Reuse the correct serviceable key only if it matches the engine manufacturer's specification, or obtain a replacement separately.
Installation Notes
- Turn the engine off, remove the ignition key, and follow the safety procedures in the service manual for your outboard.
- Place the engine in a stable position and remove the lower unit according to the manufacturer's procedure.
- Remove the water-pump housing and take out the old impeller.
- Inspect the pump housing, wear plate, cup, shaft, and drive key for wear or damage. Replace damaged components before reassembly.
- Clean the pump components and confirm that the replacement impeller dimensions match the original.
- Install the impeller with the correct drive key and orient the vanes in the direction specified by the service manual.
- Reassemble the pump housing and lower unit using the manufacturer's seals, fasteners, and torque specifications.
- Run the engine only with an appropriate water supply or flushing device and verify a steady cooling-water tell-tale stream.
Maintenance & Troubleshooting
When should a water pump impeller be replaced?
Inspect the impeller during scheduled water-pump service and replace it if the blades are cracked, hardened, permanently bent, damaged, or missing. Follow the replacement interval specified for your engine and operating conditions.
What are common signs of impeller problems?
A weak or absent tell-tale stream, overheating warnings, or visible blade damage can indicate a worn or failed impeller. Stop operating the engine if it overheats and investigate the complete cooling system.
Does this product include the drive key?
No. This listing includes one impeller only. The drive key is not included and must be verified or sourced separately for the specific engine.
Is this an OEM impeller?
No. This is an aftermarket replacement impeller cross-referenced to the OEM and aftermarket part numbers shown on this page.
Can I install it myself?
Installation may be possible for an experienced owner, but the lower unit and water-pump assembly must be serviced correctly. Use the service manual for the exact engine and consult a qualified marine technician if you are unsure.
Safety & Important Information
- Verify the complete engine model, stroke, application, and original impeller dimensions before ordering.
- Do not operate an outboard without an adequate cooling-water supply.
- Replace damaged water-pump components and use the manufacturer's installation and torque procedures.
- This is an aftermarket replacement, not an OEM component.
About Sea Sierra
Sea Sierra supplies aftermarket marine replacement parts for routine maintenance and repair. For the best fit, compare the original part and confirm the engine application before purchase.
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.
