Water Pump Impeller for Evinrude/Johnson OMC 55–75 HP, 1968–1978 – Replaces 382547, 765431, 777824
Water Pump Impeller for Evinrude/Johnson OMC 55–75 HP, 1968–1978 – Replaces 382547, 765431, 777824 is backordered and will ship as soon as it is back in stock.
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Water Pump Impeller for Evinrude/Johnson OMC 55–75 HP, 1968–1978 – ...
Water Pump Impeller for Evinrude/Johnson OMC 55–75 HP, 1968–1978 – Replaces 382547, 765431, 777824 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket water pump impeller is designed for specified Evinrude, Johnson, and OMC outboard applications from 55 to 75 HP. It is intended to restore water-pump circulation in the engine cooling system and help maintain proper operating temperature.
The impeller is listed as a replacement for OMC/Evinrude/Johnson references 382547, 765431, and 777824. Related aftermarket reference numbers listed for this application include Sierra Marine 18-3082, Mallory Marine 500307, GLM 9-45213, and SEI Marine 96-366-03AE. These references are provided for identification; always compare the original part and confirm the complete engine model before ordering.
- Single replacement water pump impeller.
- For specified Evinrude, Johnson, and OMC outboard applications.
- Designed for use in the outboard water-pump cooling system.
- Aftermarket replacement, not an OEM-manufactured component.
Part Number Matrix
Use the following references to help identify the correct replacement. Part-number listings do not replace model and year verification.
| Brand or Source | Reference Number | Reference Type |
|---|---|---|
| OMC / Evinrude / Johnson | 382547 | OEM reference |
| OMC / Evinrude / Johnson | 765431 | OEM reference |
| OMC / Evinrude / Johnson | 777824 | OEM reference |
| Sierra Marine | 18-3082 | Aftermarket reference |
| Mallory Marine | 500307 | Aftermarket reference |
| GLM | 9-45213 | Aftermarket reference |
| SEI Marine | 96-366-03AE | Aftermarket reference |
Engine & Model Compatibility
The company application data identifies the following Evinrude, Johnson, and OMC applications. The catalog occurrences reviewed for the listed OEM reference identify these applications as 2-stroke outboards. Confirm the exact model designation, year, shaft or gearcase configuration, and original impeller reference before installation.
| Brand | Rated HP | Stroke | Model Years | OEM Reference |
|---|---|---|---|---|
| Johnson / Evinrude / OMC | 55 HP | 2-Stroke | 1968–1969 | 382547 / 765431 / 777824 |
| Johnson / Evinrude / OMC | 60 HP | 2-Stroke | 1970–1971 | 382547 / 765431 / 777824 |
| Johnson / Evinrude / OMC | 65 HP | 2-Stroke | 1972–1973 | 382547 / 765431 / 777824 |
| Johnson / Evinrude / OMC | 70 HP | 2-Stroke | 1974–1978 | 382547 / 765431 / 777824 |
| Johnson / Evinrude / OMC | 75 HP | 2-Stroke | 1974–1978 | 382547 / 765431 / 777824 |
Technical Specs
- Product Type
- Water pump impeller
- Product Configuration
- Single replacement impeller
- Application
- Specified Evinrude, Johnson, and OMC outboard water-pump systems
- Engine Type
- Specified 2-stroke outboard applications
- Primary OEM Reference
- 382547
- Additional OEM References
- 765431 and 777824
- Replacement Type
- Aftermarket direct replacement for the listed applications
What’s in the Box
- 1 x Water pump impeller
No housing, water-pump cover, gasket, key, or other installation hardware is specified as included. Reuse or replace additional water-pump components only as required by the engine service procedure and their condition.
Installation Notes
- Use the service procedure for your exact Evinrude, Johnson, or OMC model.
- Disconnect the battery and place the engine in a safe, stable position before servicing.
- Remove the lower unit or water-pump components as required to access the impeller.
- Remove the old impeller and inspect the pump housing, wear plate, drive key, water tube, and seals for damage or excessive wear.
- Clean the pump components and confirm that the replacement impeller matches the removed part and the application reference.
- Install the impeller with the drive key correctly positioned and orient the vanes according to the engine manufacturer’s service instructions.
- Reassemble the water-pump and lower-unit components using the correct service specifications for the engine.
- Run the engine only in water or with an appropriate flushing device, and verify water flow and normal cooling operation before use.
Troubleshooting & FAQ
How do I know if the impeller needs replacing?
Common signs include a weak or intermittent tell-tale stream, an engine running hotter than normal, or impeller vanes that are cracked, brittle, damaged, or permanently set. Inspect the complete water-pump assembly when replacing the impeller.
Will this fit a 1976 Johnson 70 HP outboard?
The company application data lists 70 HP Johnson/Evinrude/OMC outboards from 1974 through 1978. Verify the exact model designation and compare the original impeller or OEM reference before ordering.
Does this fit every 40–75 HP Evinrude or Johnson engine?
No. The listed company applications begin at 55 HP and are limited to the specified year ranges: 55 HP for 1968–1969, 60 HP for 1970–1971, 65 HP for 1972–1973, and 70–75 HP for 1974–1978. A 40 HP application is not listed for this product.
Is this an OEM impeller?
No. This is an aftermarket replacement. The OEM and aftermarket numbers shown on this page are reference numbers used to identify compatible applications.
Does the package include a key or gasket?
The package is listed as one impeller only. A key, gasket, housing, cover, and other water-pump parts are not specified as included.
How often should a water-pump impeller be inspected?
Follow the maintenance schedule for your exact engine and inspect the impeller whenever cooling performance is reduced or the lower unit is serviced. Replacement intervals can vary with operating hours and water conditions.
Safety & Important Information
- Confirm the complete engine model, year, stroke, and original part number before ordering.
- Do not rely on horsepower alone; Evinrude and Johnson applications can vary by model and year.
- Do not run an outboard without an adequate water supply.
- Inspect the pump housing, wear plate, drive key, seals, and water tube during installation.
- Professional installation is recommended if you are not familiar with lower-unit or water-pump service.
About Sea Sierra
- Marine Replacement Parts — We provide aftermarket components for maintenance and repair of marine engines and systems.
- Application-Focused Information — Product references and fitment details are provided to help customers compare the replacement part with their original component.
- Installation Awareness — Correct model verification and adherence to the engine manufacturer’s service procedure are essential for reliable cooling performance.
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