Water Pump Impeller with Key for 2-Stroke Yamaha & Mariner 6C, 6D and 8C Outboards
Water Pump Impeller with Key for 2-Stroke Yamaha & Mariner 6C, 6D and 8C Outboards 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 with Key for 2-Stroke Yamaha & Mariner 6C, ...
Water Pump Impeller with Key for 2-Stroke Yamaha & Mariner 6C, 6D and 8C Outboards is backordered and will ship as soon as it is back in stock.
Product Details
This water pump impeller with key is an aftermarket replacement for specified 2-stroke Yamaha and Mariner outboards. It is intended for the 6C, 6D and 8C models listed below and helps restore water circulation through the outboard cooling system.
The product is supplied as one impeller together with one matching key. Confirm the exact engine model and compare the original impeller and key before ordering.
- Replacement water pump impeller for selected 2-stroke outboard applications.
- Includes one key for installation.
- Designed to support proper cooling-water circulation when correctly installed.
- Aftermarket replacement; not an OEM component.
Part Number References
The following manufacturer and aftermarket references are associated with this replacement. They are provided for identification and cross-reference purposes only.
| Brand | Part Number | Reference Type |
|---|---|---|
| Yamaha | 6G1-44352-00-00 | OEM reference |
| Mercury Marine | 47-11590M | OEM reference |
| Mercury Marine | 11590M | Reference number |
| Sierra Marine | 18-3066 | Aftermarket reference |
| Mallory Marine | 9-45610 | Aftermarket reference |
| SEI Marine | 96-499-03A | Aftermarket reference |
| GLM | 89870 | Aftermarket reference |
Engine Compatibility
This listing covers the following 2-stroke outboard model families. Year and serial-number coverage is not specified here, so verify the complete model designation and the original part before purchase.
| Brand | Model | Rated HP | Stroke | OEM Reference | Fitment Note |
|---|---|---|---|---|---|
| Yamaha | 6C | 6 HP | 2-Stroke | 6G1-44352-00-00 | Verify the complete model designation. |
| Yamaha | 6D | 6 HP | 2-Stroke | 6G1-44352-00-00 | Verify the complete model designation. |
| Yamaha | 8C | 8 HP | 2-Stroke | 6G1-44352-00-00 | Verify the complete model designation. |
| Mariner | 6C | 6 HP | 2-Stroke | 47-11590M | Verify the complete model designation. |
| Mariner | 6D | 6 HP | 2-Stroke | 47-11590M | Verify the complete model designation. |
| Mariner | 8C | 8 HP | 2-Stroke | 47-11590M | Verify the complete model designation. |
Technical Specifications
- Product Type
- Water pump impeller with key
- Application
- Selected 2-stroke Yamaha and Mariner outboards
- Supported Models
- 6C, 6D and 8C
- Rated Power Range
- 6 HP and 8 HP applications
- Material
- Rubber impeller material
- Included Key
- Yes; one key included
- Brand Type
- Aftermarket replacement
What’s in the Box
- 1 x Water pump impeller
- 1 x Matching installation key
Installation Notes
Installation requires access to the water pump housing and should follow the service procedure for the specific outboard. A qualified technician or the correct service manual is recommended if you are unfamiliar with lower-unit removal.
- Disconnect the engine from its starting system and place the outboard in a safe, stable position.
- Remove the lower unit according to the engine service procedure.
- Open the water pump housing and remove the old impeller and key.
- Inspect the housing, wear surfaces and base for scoring, corrosion or debris.
- Install the supplied key in the driveshaft slot and fit the new impeller over the key.
- Lubricate the impeller and housing with a suitable installation lubricant recommended by the service manual. Do not run the impeller dry.
- Reassemble the water pump and lower unit, then test the engine in water while checking for a steady cooling-water tell-tale stream.
Maintenance and Troubleshooting
Inspect the impeller whenever cooling performance is reduced, after extended storage, or according to the maintenance schedule for your engine. Replace it if the vanes are cracked, hardened, deformed or missing.
How do I confirm compatibility?
Match the complete engine brand and model designation to the compatibility table, then compare the original impeller, key and OEM or reference number. The model families listed do not establish every year or serial-number variation.
What are common signs of an impeller problem?
Possible symptoms include a weak or missing tell-tale stream, an overheating warning, rising engine temperature or reduced cooling performance. Stop the engine and investigate before continued operation.
Does this product include the key?
Yes. This listing includes one water pump impeller and one matching key.
Can I install it myself?
Impeller replacement is a common maintenance task, but it requires opening the water pump and may require lower-unit removal. Use the service manual for the exact engine and seek professional installation if needed.
Is this an OEM part?
No. This is an aftermarket replacement. The listed OEM and aftermarket numbers are reference numbers used to help identify the application.
Safety & Important Information
- Verify the complete engine model and the original impeller and key before ordering.
- Do not operate the engine without adequate cooling-water supply.
- Do not run a newly installed impeller dry.
- Stop operation immediately if the tell-tale stream is weak or absent or if the engine overheats.
- This is an aftermarket replacement, not an OEM component.
About Sea Sierra
- Marine Replacement Parts — Practical replacement components for routine outboard maintenance.
- Application-Focused Listings — Product references and model information are provided to support part identification.
- Customer Support — Contact us with your complete engine model details if you need help checking the application.
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