Water Pump Impeller with Key for Johnson/Evinrude 40–75 HP
Water Pump Impeller with Key for Johnson/Evinrude 40–75 HP is backordered and will ship as soon as it is back in stock.
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Water Pump Impeller with Key for Johnson/Evinrude 40–75 HP
Water Pump Impeller with Key for Johnson/Evinrude 40–75 HP 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 selected Johnson/Evinrude outboard water-pump applications. The supplier lists it for 40 HP and 50–75 HP Johnson/Evinrude engines and specifies that the replacement includes the impeller key.
The application range supplied for this part is: Johnson/Evinrude 40 HP from 1999 and newer; 50 HP from 1998 and newer; 55 HP from 1998 and newer; 60 HP from 1986 and newer; 65 HP Commercial from 1984 and newer; 70 HP from 1979 and newer; and 75 HP from 1979 through 1988.
- Aftermarket water pump impeller supplied with one matching key.
- Designed for the Johnson/Evinrude applications listed on this page.
- Use the engine model, year, serial number, and existing part number to confirm compatibility before installation.
Part Number Matrix
The following manufacturer and aftermarket references are listed by the supplier for identification and cross-reference purposes. Part-number cross-references do not replace model-specific fitment verification.
| Reference Type | Brand or Manufacturer | Part Number |
|---|---|---|
| Manufacturer reference | Evinrude / Johnson / OMC / BRP Marine | 0396725 / 0389557 / 0437080 / 0432954 / 396725 / 389557 / 437080 / 432954 / 777820 / 0777820 |
| Aftermarket reference | CEF Marine | 500303 |
| Aftermarket reference | Mallory Marine | 9-45207 |
| Aftermarket reference | Sierra Marine | 18-3053 |
| Aftermarket reference | GLM Marine | 89710 |
| Aftermarket reference | SEI Marine | 96-366-03BE |
Engine & Model Compatibility
Compatibility below follows the supplier's listed application range. Because Johnson/Evinrude fitment can vary by model code, gearcase configuration, year, and serial number, compare your engine identification plate and service-manual information before ordering.
| Brand | Rated HP | Year or Application Range | Application Notes |
|---|---|---|---|
| Johnson/Evinrude | 40 HP | 1999 and newer | Verify the exact model and serial number. |
| Johnson/Evinrude | 50 HP | 1998 and newer | Verify the exact model and serial number. |
| Johnson/Evinrude | 55 HP | 1998 and newer | Verify the exact model and serial number. |
| Johnson/Evinrude | 60 HP | 1986 and newer | Verify the exact model and serial number. |
| Johnson/Evinrude | 65 HP | Commercial models from 1984 and newer | Commercial application; confirm the model code. |
| Johnson/Evinrude | 70 HP | 1979 and newer | Verify the exact model and serial number. |
| Johnson/Evinrude | 75 HP | 1979 through 1988 | Verify the exact model and serial number. |
Technical Specs
- Product Type
- Water pump impeller with key
- Product Construction
- Aftermarket replacement component
- Included Key
- Yes; one key is included with the impeller
- Primary Application
- Selected Johnson/Evinrude outboard water-pump applications
- Reference Impeller
- 396725 and the additional manufacturer references listed in the Part Number Matrix
What’s in the Box
- 1 x aftermarket water pump impeller
- 1 x impeller key
Gaskets, seals, wear plates, pump housings, and other water-pump components are not included unless specifically stated in the order details.
Installation Notes
- Disconnect the battery or ignition system as appropriate, remove the spark-plug leads, and place the engine in neutral.
- Remove the gearcase or lower unit according to the engine service manual. Support the assembly and take care around the shift-shaft linkage and water tube.
- Remove the water-pump housing and note the installed orientation of the old impeller blades.
- Remove the old impeller and key, then clean the pump housing, wear plate, and keyway. Inspect related components for wear or damage.
- Install the supplied key in the driveshaft groove and fit the new impeller over the key.
- Use the lubricant and blade-installation direction specified by the engine manufacturer. Do not force the impeller into the housing.
- Reinstall the pump housing and all removed components using the service manual's sealing and torque procedures.
- Reinstall the gearcase, correctly aligning the driveshaft, shift shaft, and water tube.
- Run the engine only in an appropriate water supply or test tank and confirm a steady tell-tale stream before normal operation.
Troubleshooting & FAQ
How do I verify this impeller is correct for my engine?
Compare your engine brand, horsepower, model code, year, and serial number with the application range above. Also compare the old impeller and the part number shown in your service manual. Horsepower alone is not sufficient for final confirmation.
Does this product include the key?
Yes. The supplier identifies this product as a water pump impeller with key, and one impeller key is included in the package.
What are signs of a worn or failing impeller?
Common symptoms include weak or absent water flow from the tell-tale outlet, an overheating warning, or rising engine temperature. Stop operating the engine if overheating occurs and inspect the complete cooling system.
How often should a water pump impeller be replaced?
Replacement timing depends on the engine manufacturer's maintenance schedule and operating conditions. Inspect and replace it at the interval specified in your service manual, especially after operation in saltwater, sand, silt, or debris.
Can I install this without replacing the gaskets?
Use new gaskets, seals, and other related components when required by the service manual. This listing includes the impeller and key only; other water-pump service parts are not included.
Is this an OEM component?
No. This is an aftermarket replacement. The listed manufacturer and aftermarket numbers are provided for identification and compatibility cross-reference.
Safety & Important Information
- Confirm the complete engine model, year, and serial-number conditions before ordering.
- Do not rely on horsepower alone when selecting an impeller.
- Follow the engine manufacturer's service manual for removal, installation, sealant, torque, and testing procedures.
- Inspect the pump housing, wear plate, keyway, driveshaft, and related seals before installation.
- Professional installation is recommended when you are not familiar with outboard lower-unit or water-pump service.
About Sea Sierra
- Marine Replacement Parts — We provide aftermarket components for routine marine maintenance and repair.
- Application-Focused Listings — Product references and engine applications are presented to help you compare the part with your service information.
- Support for Maintenance Projects — Verify the exact model and part-number requirements before installation for the best fit.
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