Water Pump Impeller for Yamaha E8D, 8B(M), 15A/E15A and Mercury/Mariner 2-Stroke 8–15 HP
Water Pump Impeller for Yamaha E8D, 8B(M), 15A/E15A and Mercury/Mariner 2-Stroke 8–15 HP is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
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Water Pump Impeller for Yamaha E8D, 8B(M), 15A/E15A and Mercury/Mar...
Water Pump Impeller for Yamaha E8D, 8B(M), 15A/E15A and Mercury/Mariner 2-Stroke 8–15 HP 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 outboard models and Mercury/Mariner 2-stroke outboards. It helps restore water-pump flow and maintain proper cooling-system operation when the original impeller is worn, cracked, or hardened.
The impeller is listed for Yamaha E8D, 8B(M), 15A, and E15A models, as well as Mercury/Mariner 2-stroke applications rated at 8, 9.9, and 15 HP. Always compare your engine model and the existing impeller before ordering.
- Direct-fit aftermarket replacement impeller for the listed applications.
- Flexible six-blade design for water-pump circulation.
- One impeller supplied; no housing, gasket, key, or additional water-pump components are included.
Part Number Matrix
The following manufacturer and aftermarket references are associated with this impeller. Part-number matching should be confirmed together with the engine model.
| Brand | Part Number |
|---|---|
| Yamaha | 662-44352-00-00; 662-44352-01-00 |
| Mercury Marine | 47-95611M; 47-95611; 47-81242; 95611M; 81242M |
| Sierra | 18-3063 |
| GLM | 89618 |
| Mallory | 9-45608 |
Engine & Model Compatibility
Fitment depends on the exact engine model and configuration. Use the following model and horsepower conditions as a guide, then verify the part number and impeller dimensions against your original component.
| Brand | Model or Application | Rated HP | Stroke | Reference Part Number |
|---|---|---|---|---|
| Yamaha | E8D | 8 | 2-Stroke | 662-44352-00-00 / 662-44352-01-00 |
| Yamaha | 8B(M) | 8 | 2-Stroke | 662-44352-00-00 / 662-44352-01-00 |
| Yamaha | 15A | 15 | 2-Stroke | 662-44352-00-00 / 662-44352-01-00 |
| Yamaha | E15A | 15 | 2-Stroke | 662-44352-00-00 / 662-44352-01-00 |
| Mercury/Mariner | 2-stroke applications | 8, 9.9, and 15 | 2-Stroke | 47-95611M / 47-81242 |
Technical Specs
- Product Type
- Water pump impeller
- Application
- Selected Yamaha and Mercury/Mariner 2-stroke outboards
- Blade Count
- 6 blades
- Inside Diameter
- 14 mm
- Outside Diameter
- 40 mm
- Width
- 22 mm
- Installation
- Replacement water-pump impeller; verify fitment before installation
What’s in the Box
- 1 x Water pump impeller
The package does not include a water-pump housing, gasket, drive key, wear plate, or other components unless specifically stated in the order options.
Installation Notes
- Turn the engine off, remove the ignition key, and follow the service-manual safety procedure for your outboard.
- Place the outboard in neutral and remove the lower unit according to the manufacturer’s instructions.
- Remove the water-pump housing cover to access the old impeller.
- Remove the old impeller and note the direction of blade flex and the position of the drive key.
- Clean debris from the impeller cavity and inspect the housing, wear plate, seals, and drive key for damage or wear.
- Install the replacement impeller with the correct drive-key position. Turn the driveshaft in the manufacturer-specified direction while seating the impeller blades.
- Reinstall the water-pump housing and lower unit using the correct service-manual procedures and torque specifications.
- Run the engine only with an appropriate water supply and confirm a strong cooling-water telltale stream before normal operation.
Troubleshooting & FAQ
How do I confirm this impeller fits my engine?
Match your engine’s exact model and horsepower with the compatibility table, then compare the existing impeller’s dimensions and part number with the listed references. If the model, serial range, or original impeller differs, confirm fitment before ordering.
What are the signs of a failing water-pump impeller?
Common symptoms include a weak or missing telltale stream, overheating, reduced cooling-water flow, or visible cracking, hardening, or deformation of the impeller. Do not operate an outboard that is overheating.
How often should I replace the impeller?
Inspect the impeller during routine maintenance and replace it when it shows wear, cracking, hardening, distortion, or reduced water flow. Replacement intervals vary with operating hours and exposure to salt, sand, and silt.
Is this an OEM part?
No. This is an aftermarket replacement impeller associated with the Yamaha, Mercury/Mariner, Sierra, GLM, and Mallory references listed above. It is not manufactured or branded by Yamaha or Mercury Marine.
What should I do if my part number is not listed?
Contact support with the complete engine model, horsepower, stroke type, serial number, and the number printed on your existing impeller. Do not rely on horsepower alone because different engines may use different impeller dimensions.
Safety & Important Information
- Verify the exact engine model, stroke, serial information, dimensions, and reference number before purchase.
- Do not run an outboard without an adequate water supply.
- Inspect the water-pump housing, wear plate, seals, and drive key whenever the impeller is replaced.
- Professional installation is recommended when lower-unit removal or water-pump service is unfamiliar.
- This is an aftermarket replacement, not an OEM component.
About Sea Sierra
- Marine replacement parts selected for practical service and repair applications.
- Clear part-number and fitment information to help simplify compatibility checks.
- Support is available when you need help comparing an existing part with the listed application details.
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