Water Pump Repair Kit for Johnson/Evinrude Outboards – 4–8 HP 2-Stroke and 5–6 HP 4-Stroke (Replaces 396644, 0396644, 18-4529)
Water Pump Repair Kit for Johnson/Evinrude Outboards – 4–8 HP 2-Stroke and 5–6 HP 4-Stroke (Replaces 396644, 0396644, 18-4529) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Water Pump Repair Kit for Johnson/Evinrude Outboards – 4–8 HP 2-Str...
Water Pump Repair Kit for Johnson/Evinrude Outboards – 4–8 HP 2-Stroke and 5–6 HP 4-Stroke (Replaces 396644, 0396644, 18-4529) is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket Water Pump Repair Kit is designed for selected Johnson and Evinrude outboards. It provides the key service components needed to refresh the water pump and restore dependable cooling-system performance on compatible 2-stroke and 4-stroke engines.
The kit is listed for selected 2-stroke 4–8 HP models and 4-stroke 5–6 HP models. It is associated with Johnson/Evinrude and OMC reference numbers 396644, 0396644, 0389844, 389844, 765603, and 0765603, plus aftermarket references Sierra 18-4529 and GLM Marine 12065.
- Replacement water pump service kit for selected Johnson/Evinrude outboards.
- Applies to the 2-stroke and 4-stroke fitments listed below; verify the complete model information before ordering.
- Service components are supplied for replacing worn water-pump parts.
- This listing is an aftermarket replacement, not an OEM-manufactured component.
Part Number Matrix
Use these references to compare the kit with the part number shown in your engine documentation or on the component being replaced. Number references identify application leads and should be confirmed against the exact engine model.
| Brand or Source | Part Number |
|---|---|
| Johnson/Evinrude/OMC | 0389844 |
| Johnson/Evinrude/OMC | 0396644 |
| Johnson/Evinrude/OMC | 396644 |
| Johnson/Evinrude/OMC | 389844 |
| Johnson/Evinrude/OMC | 765603 |
| Johnson/Evinrude/OMC | 0765603 |
| Sierra | 18-4529 |
| GLM Marine | 12065 |
Engine & Model Compatibility
Compatibility depends on the engine's model, year, stroke configuration, and other identification details. The ranges below reflect the available product fitment information. Always compare the full model designation and the original part number before installation.
| Brand | Model Description | Rated HP | Stroke | Years or Range | Reference Part No. |
|---|---|---|---|---|---|
| Johnson/Evinrude | Deluxe models | 4 | 2-Stroke | Year not specified | 0396644 / 396644 |
| Johnson/Evinrude | Outboards | 4.5 | 2-Stroke | 1980–1997 | 0396644 / 396644 |
| Johnson/Evinrude | Outboards | 6 | 2-Stroke | 1984–1997 | 0396644 / 396644 |
| Johnson/Evinrude | Outboards | 8 | 2-Stroke | 1986–1997 | 0396644 / 396644 |
| Johnson/Evinrude | Outboards | 5 | 4-Stroke | 1998–2001 | 0396644 / 396644 |
| Johnson/Evinrude | Outboards | 6 | 4-Stroke | 1998–2004 | 0396644 / 396644 |
Technical Specs
- Product Type
- Water pump repair kit
- Application
- Selected Johnson/Evinrude and OMC outboards
- Compatible Stroke Types
- 2-stroke and 4-stroke applications as listed in the compatibility table
- Installation
- Replacement service installation in the water pump and gearcase area
- Fitment Type
- Aftermarket replacement
- Housing
- Housing inclusion is not confirmed for this listing; compare the supplied parts with the original assembly before ordering
What’s in the Box
The kit is intended for water-pump service. Package contents may vary by application, so match each component with the parts removed from your engine before installation.
- Water pump impeller assembly
- Drive key
- Water-pump grommets and seals
- Water-pump gaskets
- Service screws or mounting hardware, where required by the application
Important: The water-pump housing or housing cup is not confirmed as included with this listing. Do not assume that the kit replaces the complete housing assembly.
Installation Notes
- Disconnect the battery and remove the spark-plug leads before beginning service.
- Remove the lower unit according to the service procedure for your exact engine model.
- Open the water-pump assembly and expose the existing impeller and related service parts.
- Remove the old impeller, drive key, gaskets, grommets, and seals as applicable.
- Clean the mating surfaces and inspect the housing, cup, plate, driveshaft, and water tube for wear or damage.
- Install the new key and impeller in the correct orientation for the driveshaft.
- Fit the replacement gaskets, grommets, and seals supplied for your application.
- Reassemble the water-pump components using the torque specifications in the engine service manual.
- Reinstall the lower unit, ensuring that the driveshaft, shift linkage, and water tube are correctly aligned.
- Run the engine in an appropriate water supply and confirm a strong cooling-water stream before normal operation.
Troubleshooting & FAQ
How do I confirm that this repair kit fits my outboard?
Compare the complete engine brand, model designation, horsepower, stroke type, year, and original water-pump part number with the compatibility information above. Do not rely on horsepower alone because similar engines can use different water-pump components.
What are common signs of a worn water-pump impeller?
Common symptoms include a weak or missing tell-tale stream, overheating, steam, or an overheating warning. Reduced cooling flow can damage the engine, so stop operation and inspect the water-pump system if these symptoms appear.
Does the kit include the complete water-pump housing?
Housing inclusion is not confirmed for this product listing. The kit should be treated as a water-pump service kit rather than a complete housing assembly. Inspect the original housing, cup, and plate and replace them separately if worn.
Is this an OEM part?
No. This is an aftermarket replacement associated with the listed Johnson/Evinrude, OMC, Sierra, and GLM reference numbers. Brand and reference numbers are provided for identification and fitment comparison only.
How often should a water-pump impeller be replaced?
Replacement timing depends on operating hours, storage conditions, and exposure to sand, silt, salt water, or debris. Follow the maintenance interval in your engine service literature and inspect the impeller whenever cooling-water flow is reduced.
Can a beginner install this kit?
Installation requires removal of the lower unit and correct reassembly of the water-pump and gearcase components. A qualified technician or an experienced DIY mechanic should perform the work if you do not have the correct service manual and tools.
Safety & Important Info
- Verify the exact model, year, stroke type, and original part number before purchase.
- Do not operate an outboard with insufficient cooling-water flow.
- Inspect the existing water-pump housing and related components for wear; housing parts are not confirmed as included.
- This is an aftermarket replacement and is not manufactured by Johnson, Evinrude, or OMC.
- Follow the engine manufacturer's service procedures and torque specifications.
About Sea Sierra
- Marine Replacement Parts — We supply aftermarket components for routine marine-engine maintenance and repair.
- Application-Focused Listings — Reference numbers and compatibility details are provided to help you compare replacement parts accurately.
- Service Support — Confirm the complete engine identification and original component before installation.
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