Water Pump Impeller with Key – Fits Johnson/Evinrude 85–235 HP (Replaces 385528, 389642, 777212)
Water Pump Impeller with Key – Fits Johnson/Evinrude 85–235 HP (Replaces 385528, 389642, 777212) 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 with Key – Fits Johnson/Evinrude 85–235 HP (Rep...
Water Pump Impeller with Key – Fits Johnson/Evinrude 85–235 HP (Replaces 385528, 389642, 777212) is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket water pump impeller with key is designed for specified Evinrude and Johnson outboard engines from 1973–1978. The impeller helps circulate cooling water through the engine to support proper operating temperature and reduce the risk of overheating.
The product is supplied with a drive key for installation. It is listed for use with Evinrude/Johnson/OMC/BRP references 0777212, 0777823, 0389642, 0385528, 777212, 777823, 389642, and 385528. Listed aftermarket reference numbers include Mallory Marine 9-45203, Sierra Marine 18-3043, GLM Marine 89680, SEI Marine 96-399-07E, and CEF 500305.
- Aftermarket replacement water pump impeller for specified Johnson and Evinrude outboards.
- Includes the drive key required for the keyed shaft connection.
- Helps restore water-pump circulation when the original impeller is worn, cracked, hardened, or damaged.
- Inspect the original impeller, keyway, housing, wear plate, and sealing surfaces before installation.
Part Number Matrix
Use the following numbers as reference points when comparing your original part and engine application. Always confirm the exact model and year before ordering.
| Brand or source | Part number | Reference |
|---|---|---|
| Evinrude / Johnson / OMC / BRP | 0777212 | Listed manufacturer reference |
| Evinrude / Johnson / OMC / BRP | 0777823 | Listed manufacturer reference |
| Evinrude / Johnson / OMC / BRP | 0389642 | Listed manufacturer reference |
| Evinrude / Johnson / OMC / BRP | 0385528 | Listed manufacturer reference |
| Evinrude / Johnson / OMC / BRP | 777212 | Listed manufacturer reference |
| Evinrude / Johnson / OMC / BRP | 777823 | Listed manufacturer reference |
| Evinrude / Johnson / OMC / BRP | 389642 | Listed manufacturer reference |
| Evinrude / Johnson / OMC / BRP | 385528 | Listed manufacturer reference |
| Mallory Marine | 9-45203 | Listed aftermarket reference |
| Sierra Marine | 18-3043 | Listed aftermarket reference |
| GLM Marine | 89680 | Listed aftermarket reference |
| SEI Marine | 96-399-07E | Listed aftermarket reference |
| CEF | 500305 | Listed aftermarket reference |
Engine & Model Compatibility
The company application data lists this impeller with key for the following Evinrude and Johnson outboard horsepower and year ranges. Confirm your exact engine model, year, and original part number before installation.
| Brand | Rated horsepower | Years | Application note |
|---|---|---|---|
| Evinrude / Johnson | 85 HP | 1973–1978 | Specified application range |
| Evinrude / Johnson | 115 HP | 1973–1978 | Specified application range |
| Evinrude / Johnson | 135 HP | 1973–1976 | Specified application range |
| Evinrude / Johnson | 140 HP | 1977–1978 | Specified application range |
| Evinrude / Johnson | 150 HP | 1976–1978 | Specified application range |
| Evinrude / Johnson | 175 HP | 1976–1978 | Specified application range |
| Evinrude / Johnson | 200 HP | 1976–1978 | Specified application range |
| Evinrude / Johnson | 235 HP | 1978 | Specified application range |
Technical Specs
- Product type
- Water pump impeller with drive key
- Application
- Specified Evinrude and Johnson outboard water-pump systems
- Connection
- Keyed drive shaft
- Product status
- Aftermarket replacement; not an OEM component
What’s in the Box
- 1 x Water pump impeller
- 1 x Drive key
Gaskets, seals, housing, wear plates, and other water-pump components are not listed as included and may need to be purchased separately.
Installation Notes
- Disconnect the battery and follow the safety procedures in your engine service manual.
- Remove the lower unit according to the manufacturer’s procedure, taking care around the shift shaft and water tube.
- Remove the water-pump housing and inspect the housing, wear plate, seals, and sealing surfaces.
- Remove the old impeller and inspect the drive-shaft keyway. Remove debris and corrosion before fitting the new key.
- Install the supplied drive key securely in the shaft keyway, then position the impeller over the key and shaft.
- Install the impeller into the housing while rotating the drive shaft in the direction specified by the engine service manual. Do not force or fold the blades against the wrong rotation.
- Reassemble the water-pump housing with the correct gasket or seal as required by your engine. Tighten fasteners to the manufacturer’s specifications.
- Reinstall the lower unit and confirm that the drive shaft, water tube, and shift linkage are properly aligned.
- Test the engine using the manufacturer’s recommended procedure and verify a strong cooling-water tell-tale stream before normal operation.
Troubleshooting & FAQ
How do I know if my impeller needs replacement?
Common signs include a weak or missing tell-tale stream, overheating, or impeller blades that are cracked, brittle, permanently bent, or missing during inspection. Replace the impeller according to the engine manufacturer’s maintenance schedule and inspect it more often when the engine has been run in sandy or debris-filled water.
Will this fit an engine outside the listed range?
Do not assume fitment based only on horsepower. If your exact engine year and application are not listed, compare the original impeller and manufacturer part number with the references above before purchasing.
What causes premature impeller failure?
Running an outboard without an adequate water supply, operating in sandy or debris-heavy water, a damaged water-pump housing, debris in the cooling system, or incorrect installation can shorten impeller life.
Is the drive key included?
Yes. This product is the impeller-with-key version and includes one drive key. Gaskets, seals, housing, and wear plates are not listed as included.
Is this an OEM part?
No. This is an aftermarket replacement impeller with a supplied drive key. The manufacturer and aftermarket reference numbers are provided only to help with application and part comparison.
Safety & Important Information
- Verify the exact engine model, year, horsepower, and original part number before ordering.
- Do not operate the outboard without an adequate cooling-water supply.
- Inspect the water-pump housing, wear plate, seals, and keyway whenever the impeller is replaced.
- Use the engine manufacturer’s service manual for torque values, shaft-rotation direction, and lower-unit installation procedures.
- Professional installation is recommended if you are not familiar with outboard lower-unit service.
About Sea Sierra
- Marine Replacement Parts — We supply aftermarket components for maintenance and repair applications.
- Application-Focused Listings — Product references and engine ranges are provided to support careful part comparison.
- Practical Service Support — Always verify the original component and follow the engine manufacturer’s installation procedures.
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