Water Pump Impeller for Yamaha 6HP & 8HP 2-Stroke Outboards – Replaces 6G1-44352-00-00
Water Pump Impeller for Yamaha 6HP & 8HP 2-Stroke Outboards – Replaces 6G1-44352-00-00 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 Yamaha 6HP & 8HP 2-Stroke Outboards – R...
Water Pump Impeller for Yamaha 6HP & 8HP 2-Stroke Outboards – Replaces 6G1-44352-00-00 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket water pump impeller is designed for selected Yamaha 6HP and 8HP two-stroke outboard engines. It is a replacement impeller for the water pump and helps maintain the cooling-water flow required for normal engine operation.
The primary Yamaha reference is 6G1-44352-00-00. Catalog references also associate this impeller size and application with Sierra 18-3066, Mercury Marine 47-11590M, and CEF 500302. These references should be used together with the engine model and year, not as a substitute for verifying the complete application.
- Aftermarket water pump impeller for selected Yamaha 6HP and 8HP two-stroke outboards.
- Neoprene rubber construction for marine cooling-system service.
- Direct-replacement style installation; inspect the pump housing, wear surfaces, and drive/key arrangement before fitting.
- Single impeller supplied; pump housing, gasket, wear plate, and other water-pump components are not included unless separately stated.
Part Number Matrix
The following are manufacturer or aftermarket reference numbers associated with this replacement. Confirm the number and application against your engine before ordering.
| Brand | Reference Number | Reference Type |
|---|---|---|
| Yamaha | 6G1-44352-00-00 | OEM reference |
| Sierra | 18-3066 | Aftermarket reference |
| Mercury Marine | 47-11590M | Aftermarket/OEM-style reference |
| CEF | 500302 | Aftermarket reference |
Engine & Model Compatibility
Application information below is limited to model-year relationships found in the available engine catalog records. The listed engines are Yamaha two-stroke models. Always compare the complete model code, year, existing impeller, and drive/key arrangement before installation.
| Brand | Model | Rated HP | Stroke | Year(s) shown in catalog records | OEM Reference |
|---|---|---|---|---|---|
| Yamaha | 8LK, 8LN, 8SK, 8SN | 8 | 2-Stroke | 1984–1985 | 6G1-44352-00-00 |
| Yamaha | 6LH, 6LJ, 6SH, 6SJ | 6 | 2-Stroke | 1986–1987 | 6G1-44352-00-00 |
| Yamaha | Additional 6HP and 8HP model variants | 6 or 8 | 2-Stroke | Verify by exact model and year | 6G1-44352-00-00 |
Some aftermarket catalogs also list the related reference 47-11590M for Mercury/Mariner applications. Because model, year, and drive details were not established together for every Mercury/Mariner listing, Mercury and Mariner owners should confirm the exact engine model and original impeller dimensions before purchase.
Technical Specifications
- Product Type
- Water pump impeller
- Application
- Selected Yamaha 6HP and 8HP two-stroke outboards
- Material
- Neoprene rubber
- Outside Diameter
- Approximately 1.575 in / 39.56 mm
- Inside Diameter
- Approximately 0.453 in / 11.50 mm
- Drive Arrangement
- Verify the impeller slot, key, or drive shape against the original part before installation
- Installation
- Replacement installation in the existing water-pump housing
What’s in the Box
- 1 x Water pump impeller
Gaskets, pump cups, wear plates, bolts, seals, and drive keys are not included unless specifically listed with the product.
Installation Notes
- Stop the engine, disconnect the battery where applicable, shut off the fuel supply, and follow the service manual safety procedure.
- Place the outboard securely in neutral and remove the lower unit according to the manufacturer’s procedure.
- Open the water-pump housing and remove the old impeller.
- Inspect the pump housing, wear plate, cup, seals, and drive/key components for scoring, cracking, corrosion, or excessive wear. Replace damaged components before reassembly.
- Clean the housing and confirm that the replacement impeller matches the original diameter, height, slot, and drive arrangement.
- Install the impeller in the correct orientation and engage the shaft key or drive feature as required by the engine design. Do not force an incompatible key or slot.
- Reassemble the pump housing and lower unit using the manufacturer’s tightening sequence and torque specifications.
- Run the engine only in an appropriate test tank or in the water, and confirm a steady cooling-water tell-tale stream before normal operation.
Troubleshooting & FAQ
How do I confirm that this impeller fits my outboard?
Check the complete engine model code and year, then compare the OEM reference, outside diameter, inside diameter, height, slot, and drive/key arrangement with the original impeller. A horsepower match alone is not sufficient because different model years can use different cooling-system parts.
Does this product fit every Yamaha 6HP or 8HP outboard?
No. It is intended for selected Yamaha 6HP and 8HP two-stroke models associated with the 6G1-44352-00-00 reference. Confirm the exact model and year before ordering.
Can I use the Mercury reference to confirm fitment?
The related reference 47-11590M appears in aftermarket cross-reference catalogs, but a cross-reference number alone does not establish every Mercury or Mariner model application. Verify the complete engine model and the original impeller dimensions.
What are the signs of a worn impeller?
Common signs include a weak or missing tell-tale stream, overheating, an overheating alarm, steam, or reduced cooling-water flow. Inspect the pump and cooling passages promptly if any of these symptoms appear.
How often should a water-pump impeller be replaced?
Replacement intervals depend on the engine manufacturer’s maintenance schedule, operating hours, storage conditions, and water quality. Inspect the impeller during scheduled service and replace it sooner if the blades are hard, cracked, distorted, or damaged.
Is this an OEM Yamaha part?
No. This is an aftermarket replacement impeller intended to match the listed application and reference numbers. Yamaha is mentioned only to identify the compatible engine brand and OEM reference.
Safety & Important Information
- Verify the exact model, year, reference number, and dimensions before ordering.
- Do not operate an outboard with inadequate cooling-water flow.
- Use the manufacturer’s service manual for lower-unit removal, torque values, sealing procedures, and final testing.
- Professional installation is recommended when lower-unit or water-pump service experience is limited.
- This is an aftermarket replacement, not an OEM component.
About Sea Sierra
- Marine Replacement Parts — Practical aftermarket components for routine outboard maintenance and repair.
- Application-Focused Information — Reference numbers and model details are provided to support careful part selection.
- Value for Maintenance — Replacement parts for keeping marine equipment serviceable and ready for use.
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.
