Water Pump Impeller Kit with Housing for Johnson/Evinrude V4 & V6 Hydraulic-Shift Outboards
Water Pump Impeller Kit with Housing for Johnson/Evinrude V4 & V6 Hydraulic-Shift Outboards is backordered and will ship as soon as it is back in stock.
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Water Pump Impeller Kit with Housing for Johnson/Evinrude V4 & ...
Water Pump Impeller Kit with Housing for Johnson/Evinrude V4 & V6 Hydraulic-Shift Outboards is backordered and will ship as soon as it is back in stock.
Product Details
This water pump impeller kit with housing is an aftermarket replacement assembly for selected Johnson and Evinrude V4 and V6 hydraulic-shift, two-stroke outboard engines from approximately 1976–1978. It is installed in the lower unit and replaces the impeller, pump housing, wear surfaces, gaskets, seals, and related hardware needed to service the water pump.
Replacing the complete pump assembly can help restore water-pump performance when the impeller, cup, plate, housing, or sealing surfaces are worn. Confirm the engine model, year, shift type, and original part number before ordering.
- Water pump service kit with housing and related components.
- Designed for selected Johnson/Evinrude V4 and V6 hydraulic-shift outboards.
- Installs in the outboard lower unit.
- Includes a half-moon-style impeller key for the applicable pump design.
Part Number References
The following numbers are commonly used as reference points for this replacement application. Verify the original part and engine model before purchase; reference numbers alone do not establish fitment for every engine configuration.
| Brand or Source | Reference Number |
|---|---|
| Johnson/Evinrude | 395073 |
| Johnson/Evinrude | 388644 |
| Johnson/Evinrude | 389158 |
| Johnson/Evinrude | 777813 |
| Sierra | 18-3393 |
| GLM | 12101 |
| Mallory | 9-48208 |
| SEI | 96-306-01K |
| EMP | 46-00095 |
Engine Compatibility
This kit is intended for selected Johnson/Evinrude 85–235 HP V4 and V6 two-stroke outboards with hydraulic shifting, primarily model years 1976–1978. Compatibility must be confirmed using the complete engine model number and original water-pump part number.
| Brand | Engine Family | Rated HP Range | Stroke | Approximate Years | Shift Type |
|---|---|---|---|---|---|
| Johnson/Evinrude | V4 outboards | 85–140 HP | 2-Stroke | 1976–1978 | Hydraulic shift |
| Johnson/Evinrude | V6 outboards | 150–235 HP | 2-Stroke | 1976–1978 | Hydraulic shift |
Example model designations associated with the listed application include selected 85, 115, 140, 150, 175, 200, and 235 HP models such as 85790S, 85890C, 85ETLR78C, 115790S, 140740S, 150840S, 175740S, 200740C, 200840R, and 235840R. These examples are not a substitute for checking the complete model number, year, and gearcase configuration.
Technical Specifications
- Product Type
- Water pump impeller kit with housing
- Application
- Selected Johnson/Evinrude V4 and V6 hydraulic-shift outboard lower units
- Stroke
- Two-stroke
- Installation Location
- Outboard lower unit
- Impeller Key
- Half-moon style, for the applicable hydraulic-shift pump design
- Product Type
- Aftermarket replacement, not an OEM component
What's in the Box
- 1 × Cup and plate assembly
- 1 × Water pump impeller
- 1 × Impeller gasket, reference 325537
- 1 × Pump housing
- 1 × Wear plate
- 4 × Installation bolts
- 1 × Half-moon-style impeller key
- 1 × Seal
- 3 × O-rings
- 3 × Gaskets
Component appearance may vary slightly by production batch. Compare the included components with the original pump assembly before installation.
Installation Notes
- Disconnect the battery and place the outboard in neutral.
- Place a drain pan under the lower unit and remove the gearcase drain and fill screws to drain the lubricant.
- Remove the fasteners securing the lower unit to the upper leg, then carefully lower and detach the gearcase.
- Remove the old water-pump housing to expose the impeller, wear plate, and related seals.
- Clean the mounting surfaces, driveshaft, water-pump cavity, and water-tube area. Remove old gasket material and debris.
- Install the new wear plate and gasket, fit the impeller key, install the impeller, and fit the housing, seals, and O-rings in the correct order.
- Tighten the housing fasteners according to the engine manufacturer's service specifications.
- Reinstall the lower unit, ensuring that the driveshaft, shift shaft, and water tube are correctly aligned.
- Refill the gearcase with the correct marine gear lubricant and specified quantity.
- Run the engine only with an appropriate water supply, such as flushing muffs, and confirm a steady tell-tale stream before normal operation.
Use the manufacturer's service manual for torque values, lubricant specifications, shift-linkage procedures, and model-specific disassembly instructions.
Troubleshooting & FAQ
How do I confirm whether this kit fits my engine?
Check the complete engine model number, year, horsepower, stroke, shift type, and original water-pump part number. This kit is intended for selected Johnson/Evinrude V4 and V6 two-stroke hydraulic-shift applications from approximately 1976–1978. Do not rely on horsepower alone.
What are the signs of a failing water pump?
Common symptoms include a weak or absent tell-tale stream, an overheating warning, excessive engine temperature, or steam near the exhaust. Stop the engine if overheating occurs and investigate the cooling system before further operation.
How often should the impeller be replaced?
Inspect the impeller during regular maintenance and replace it when the vanes are damaged, permanently set, cracked, or hardened. Replacement intervals depend on operating hours, storage conditions, and exposure to saltwater, sand, or silt.
Is this kit for mechanical, electric, or hydraulic shifting?
This application is for the specified hydraulic-shift gearcases. It is not confirmed for electric-shift or standard mechanical-shift gearcases unless the complete model and original pump references match.
Why replace the housing instead of only the impeller?
The pump housing, cup, and wear plate can develop scoring or wear over time. Replacing these parts together with the impeller helps restore the sealing and contact surfaces needed for efficient water-pump operation.
Is this an OEM part?
No. This is an aftermarket replacement kit intended to correspond to the listed application and reference numbers. It is not manufactured or supplied by Johnson or Evinrude.
Safety & Important Information
- Confirm the complete engine model, year, horsepower, stroke, shift type, and original part number before ordering.
- Compare the new components with the original pump assembly before installation.
- Follow the applicable factory service manual for disassembly, torque, lubrication, and testing procedures.
- Professional installation is recommended when lower-unit or shift-linkage service is unfamiliar.
- This is an aftermarket replacement, not an OEM component.
About Sea Sierra
- Marine Replacement Parts — Practical replacement components for common marine service applications.
- Application-Focused Information — Use model, year, engine configuration, and original part references to verify fitment.
- Support for Maintenance Projects — Replacement kits designed to help restore serviceable marine systems when correctly matched and installed.
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