Water Pump Repair Kit – Fits Evinrude/Johnson 25–35 HP 2-Stroke Outboards, 1976–1983
Water Pump Repair Kit – Fits Evinrude/Johnson 25–35 HP 2-Stroke Outboards, 1976–1983 is backordered and will ship as soon as it is back in stock.
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Water Pump Repair Kit – Fits Evinrude/Johnson 25–35 HP 2-Stroke Out...
Water Pump Repair Kit – Fits Evinrude/Johnson 25–35 HP 2-Stroke Outboards, 1976–1983 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 Evinrude and Johnson 2-Stroke outboards rated at 25 HP and 35 HP. It is intended for water pump service on 25 HP models from 1977–1983 and 35 HP models from 1976–1980.
The kit is listed for use with the OEM reference numbers shown below. Confirm your engine's exact model, year, and existing part number before ordering, because water pump components can vary between closely related outboard models.
- Aftermarket water pump service and repair component.
- Designed for installation in the outboard gearcase/lower-unit water pump assembly.
- For selected Evinrude and Johnson 2-Stroke 25 HP and 35 HP applications.
- Aftermarket reference: 18-3401.
Part Number Matrix
The following are company-listed OEM reference numbers associated with this water pump repair kit. They are provided for identification and cross-reference purposes only; they do not indicate that every number applies to every engine in the fitment range.
| Brand | OEM Reference Number | Reference Type |
|---|---|---|
| Evinrude / Johnson | 0389980 | Company-listed OEM reference |
| Evinrude / Johnson | 0388456 | Company-listed OEM reference |
| Evinrude / Johnson | 0389981 | Company-listed OEM reference |
| Evinrude / Johnson | 0319687 | Company-listed OEM reference |
| Evinrude / Johnson | 0387074 | Company-listed OEM reference |
| Evinrude / Johnson | 0388256 | Company-listed OEM reference |
| Evinrude / Johnson | 0388257 | Company-listed OEM reference |
| Evinrude / Johnson | 0319611 | Company-listed OEM reference |
| Evinrude / Johnson | 0387059 | Company-listed OEM reference |
| Aftermarket | 18-3401 | Aftermarket reference |
Engine & Model Compatibility
Use the horsepower, stroke, and year ranges below as an initial fitment guide. Always verify the complete engine model and the reference number on the original component before installation.
| Brand | Rated HP | Stroke | Model Years | Application |
|---|---|---|---|---|
| Evinrude / Johnson | 25 HP | 2-Stroke | 1977–1983 | Water pump service |
| Evinrude / Johnson | 35 HP | 2-Stroke | 1976–1980 | Water pump service |
Technical Specifications
- Product Type
- Water pump repair kit
- Application
- Selected Evinrude and Johnson 2-Stroke outboards
- Rated Horsepower
- 25 HP and 35 HP
- Installation Location
- Gearcase/lower-unit water pump assembly
- Model-Year Coverage
- 25 HP: 1977–1983; 35 HP: 1976–1980
- Product Status
- Aftermarket replacement
Package Information
This listing is for the water pump repair kit associated with the reference numbers and applications shown above. Exact component contents and quantities are not specified in the company catalog record. Please compare the product image and your existing water pump assembly before ordering.
Installation Notes
- Confirm the engine brand, horsepower, stroke, model year, and existing water pump reference number before beginning service.
- Disconnect the battery where applicable and prevent accidental engine starting.
- Remove the lower unit according to the engine manufacturer's service procedure.
- Disassemble the water pump carefully and note the position and orientation of the original components.
- Clean the driveshaft, water pump mating surfaces, and surrounding area before fitting replacement components.
- Install the repair components in the correct order and orientation for your specific engine model.
- Use the manufacturer's service-manual torque specifications when tightening fasteners.
- Reinstall the lower unit, ensuring that the water tube and shift mechanism are correctly aligned.
- After installation, run the engine only in an appropriate water source or with suitable flushing equipment and verify proper cooling-water flow.
Troubleshooting & FAQ
How do I confirm whether this kit fits my outboard?
Check that your engine is an Evinrude or Johnson 2-Stroke model within the listed range: 25 HP from 1977–1983 or 35 HP from 1976–1980. Also compare the complete engine model and the water pump reference number with the information in the part-number matrix.
What symptoms can indicate water pump service is needed?
Possible symptoms include weak or missing cooling-water flow, overheating, or a cooling-water warning. Inspect the complete cooling system and follow the engine manufacturer's troubleshooting procedure before replacing parts.
Does this listing represent an OEM part?
No. This is an aftermarket replacement water pump repair kit. The OEM reference numbers are included only to help identify the intended application.
Are all listed reference numbers interchangeable on every compatible engine?
No. The reference numbers are associated with different applications within the stated fitment range. Verify the exact engine model, year, and original component number before ordering.
Can I install the kit without a service manual?
Water pump service requires correct disassembly, component orientation, sealing, and fastener torque. Use the appropriate service information for your exact engine, and seek professional assistance if you are not familiar with lower-unit service.
Safety & Important Information
- Verify the engine model, year, horsepower, stroke, and reference number before purchase.
- Do not install the part if the original component or mounting arrangement differs from the product information.
- This is an aftermarket replacement, not an original equipment manufacturer component.
- Incorrect water pump installation can cause inadequate cooling and serious engine damage.
- Professional installation is recommended when lower-unit service experience or model-specific service information is unavailable.
About Sea Sierra
- Marine Replacement Parts — We provide aftermarket parts for a wide range of marine maintenance and repair applications.
- Application-Focused Information — Product references and fitment ranges are presented to help you compare parts before ordering.
- Service Support — Always use the correct service information for your specific engine when installing replacement components.
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