Water Pump Impeller for Johnson/Evinrude 40 HP 2-Stroke Outboards, 1983–1986 – Replaces 390286, 0390286, 777835 and 0777835
Water Pump Impeller for Johnson/Evinrude 40 HP 2-Stroke Outboards, 1983–1986 – Replaces 390286, 0390286, 777835 and 0777835 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Water Pump Impeller for Johnson/Evinrude 40 HP 2-Stroke Outboards, ...
Water Pump Impeller for Johnson/Evinrude 40 HP 2-Stroke Outboards, 1983–1986 – Replaces 390286, 0390286, 777835 and 0777835 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket Water Pump Impeller is a replacement impeller for selected Johnson and Evinrude 40 HP 2-stroke outboard engines from 1983 through 1986. It is intended for the water pump assembly and helps maintain the cooling-water flow required for normal engine operation.
Reference numbers listed for this impeller include Johnson/Evinrude/OMC/BRP Marine 0390286, 0777835, 390286 and 777835; Sierra Marine 18-3366; CEF 500353; Mallory Marine 9-45212; GLM 89990; and SEI Marine 96-399-05E.
- Replacement water pump impeller for selected 40 HP 2-stroke outboards.
- Designed for installation in the water pump assembly when the original impeller requires replacement.
- Single impeller supplied; no key or gasket is specified as included.
- Verify the complete engine model and year before ordering.
Part Number Matrix
Use the following reference numbers to compare the impeller with your existing part. These numbers identify reference or aftermarket cross-reference applications and should be confirmed against the engine model and water-pump assembly.
| Brand | Reference Part Number |
|---|---|
| Johnson/Evinrude/OMC/BRP Marine | 0390286 |
| Johnson/Evinrude/OMC/BRP Marine | 0777835 |
| Johnson/Evinrude/OMC/BRP Marine | 390286 |
| Johnson/Evinrude/OMC/BRP Marine | 777835 |
| Sierra Marine | 18-3366 |
| CEF | 500353 |
| Mallory Marine | 9-45212 |
| GLM | 89990 |
| SEI Marine | 96-399-05E |
Engine & Model Compatibility
This impeller is listed for the following selected 40 HP 2-stroke Johnson and Evinrude outboard models. Model, year, stroke type and part number must be considered together.
| Brand | Model | Rated HP | Stroke | Year | Reference Part No. |
|---|---|---|---|---|---|
| Evinrude | E40RSLR | 40 | 2-Stroke | 1983 | 0390286 |
| Evinrude | E40RSR | 40 | 2-Stroke | 1983 | 0390286 |
| Evinrude | E40RWLCTR | 40 | 2-Stroke | 1983 | 0390286 |
| Evinrude | E40RWLTR | 40 | 2-Stroke | 1983 | 0390286 |
| Evinrude | E40RWCDB, E40RWLCDB | 40 | 2-Stroke | 1986 | 0390286 |
| Evinrude | E40RWCOM, E40RWLCOM | 40 | 2-Stroke | 1985 | 0390286 |
| Evinrude | E40RWCRA, E40RWLCRA | 40 | 2-Stroke | 1984 | 0390286 |
| Johnson | J40RSLR | 40 | 2-Stroke | 1983 | 0390286 |
| Johnson | J40RSR | 40 | 2-Stroke | 1983 | 0390286 |
| Johnson | J40RWCTR | 40 | 2-Stroke | 1983 | 0390286 |
| Johnson | J40RWCDB, J40RWLCDB | 40 | 2-Stroke | 1986 | 0390286 |
| Johnson | J40RWCOM, J40RWLCOM | 40 | 2-Stroke | 1985 | 0390286 |
| Johnson | J40RWCRA, J40RWLCRA | 40 | 2-Stroke | 1984 | 0390286 |
Technical Specs
- Product Type
- Water pump impeller
- Application
- Selected Johnson and Evinrude 40 HP outboards
- Stroke
- 2-Stroke
- Model Years
- 1983–1986, according to the listed model applications
- Primary Reference Number
- 390286 / 0390286
- Package Type
- Single replacement impeller
What’s in the Box
- 1 x Water Pump Impeller
A drive key, gasket, O-ring or water-pump housing is not specified as included. Inspect the existing key and related pump components and replace them separately when required by the service procedure.
Installation Notes
- Disconnect the battery and follow the manufacturer’s safety procedure before beginning work.
- Shift the engine as required and remove the lower unit or gearcase according to the service manual.
- Remove the water-pump housing and retain the hardware and components in their original order.
- Remove the old impeller and inspect the key, keyway, housing, plate and gaskets for wear or damage.
- Clean the pump cavity and confirm that the replacement impeller matches the original part and housing before installation.
- Install the impeller on the driveshaft with the drive key correctly positioned. Do not assume that a key or gasket is included with this product.
- Install the pump housing over the impeller, turning the driveshaft in the direction specified by the engine service manual so the vanes seat correctly.
- Reinstall the pump housing, gaskets and related hardware using the manufacturer’s tightening procedure.
- Reinstall the lower unit, ensuring that the water tube, driveshaft and shift linkage are correctly aligned.
- Run the engine only according to the manufacturer’s procedure and verify proper cooling-water flow before normal operation.
Troubleshooting & FAQ
How can I confirm that this impeller fits my engine?
Check that your outboard is a Johnson or Evinrude 40 HP 2-stroke model covered by the compatibility table and that the existing impeller matches the listed reference numbers, including 390286 or 0390286. Model and year information should be read from the engine identification plate or service documentation.
Does this listing include a drive key?
No drive key is specified as included. Inspect the existing key and keyway during service and obtain the correct replacement key separately if the original is damaged, missing or worn.
How often should a water-pump impeller be replaced?
Impeller service intervals depend on the engine manufacturer, operating hours and water conditions. Inspect the impeller during the interval specified in your service manual, and replace it sooner if the engine overheats, cooling-water flow is weak or the impeller shows cracking, hardening or damaged vanes.
What are the signs of a failing impeller?
Common signs include engine overheating, weak or absent water flow from the tell-tale outlet, damaged or missing vanes, or impeller fragments found in the cooling system. Stop operating the engine if overheating occurs and diagnose the cooling system before continued use.
Do the vanes need to be bent in a specific direction during installation?
The vanes must be seated in the direction specified by the engine service manual. The correct direction depends on the pump and driveshaft rotation; do not rely on a generic clockwise instruction without confirming the procedure for your exact engine.
Is this an OEM impeller?
No. This listing is for an aftermarket replacement impeller. The reference numbers are provided to help compare the part with the original application.
What are the shipping options?
Standard and expedited shipping options, where available, are shown at checkout. Delivery time and cost vary by destination and selected service.
What is the warranty and return policy?
Warranty and return eligibility are subject to the current store policies. Contact customer support with your order details before returning or installing a part if you believe there is a problem.
Safety & Important Information
- Confirm the complete engine model, year, stroke type and reference part number before ordering.
- Compare the replacement impeller with the original part, pump housing and drive key before installation.
- This is an aftermarket replacement, not an OEM component.
- Follow the engine manufacturer’s service manual for lower-unit removal, installation direction, torque values and post-installation testing.
- Professional installation is recommended if you are not experienced with outboard lower-unit or water-pump service.
About Sea Sierra
- Marine replacement parts selected for practical repair and maintenance applications.
- Clear compatibility information to help customers compare model, year and reference-number requirements.
- Customer support for product and order questions.
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