Water Pump Impeller for Johnson/Evinrude OMC 40 HP 2-Stroke Outboards, 1983–1986 – Replaces 390286, 0390286, 777835 and 0777835
Water Pump Impeller for Johnson/Evinrude OMC 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.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
Water Pump Impeller for Johnson/Evinrude OMC 40 HP 2-Stroke Outboar...
Water Pump Impeller for Johnson/Evinrude OMC 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 is a direct-replacement water pump impeller for 40 HP 2-stroke Johnson and Evinrude outboard engines from 1983–1986. It is intended for the specific model applications listed below and helps restore water-pump circulation for proper engine cooling.
This impeller replaces the listed Johnson/Evinrude/OMC references 390286, 0390286, 777835, and 0777835. Additional aftermarket cross-references listed for this application include Sierra 18-3366, CEF 500353, Mallory 9-45212, GLM 89990, SEI Marine 96-399-05E, and 183366.
- Replacement water-pump impeller for the specified Johnson and Evinrude applications.
- Designed for direct installation when the engine, model, year, and existing pump dimensions match.
- Sold as one water-pump impeller; a key is not included with this product.
Part Number Matrix
Use the following references to compare the impeller with your existing part before ordering. Part-number references do not replace checking the complete engine model and year.
| Brand or Reference | Part Number |
|---|---|
| Johnson/Evinrude/OMC | 390286 |
| Johnson/Evinrude/OMC | 0390286 |
| Johnson/Evinrude/OMC | 777835 |
| Johnson/Evinrude/OMC | 0777835 |
| Sierra | 18-3366 |
| CEF | 500353 |
| Mallory | 9-45212 |
| GLM | 89990 |
| SEI Marine | 96-399-05E |
| Additional reference | 183366 |
Engine & Model Compatibility
Compatibility is limited to the listed 40 HP 2-stroke Johnson and Evinrude outboard models manufactured from 1983 through 1986. Verify the complete model designation before installation.
| Brand | Rated HP | Stroke | Years | Compatible Models | OEM Reference |
|---|---|---|---|---|---|
| Evinrude | 40 | 2-Stroke | 1983–1986 | E40RSLR, E40RSR, E40RWCDB, E40RWCOM, E40RWCRA, E40RWLCDB, E40RWLCOM, E40RWLCRA, E40RWLCTR, E40RWLTR | 0390286 |
| Johnson | 40 | 2-Stroke | 1983–1986 | J40RSLR, J40RSR, J40RWCDB, J40RWCOM, J40RWCRA, J40RWCTR, J40RWLCDB, J40RWLCOM, J40RWLCRA, J40RWLCTR | 0390286 |
Important: The compatibility information above does not confirm every serial-number variation. Check your engine identification label, service manual, original impeller, and water-pump housing before ordering.
Technical Specs
- Product Type
- Water pump impeller
- Application
- Johnson/Evinrude 40 HP 2-stroke outboards, 1983–1986 applications listed above
- Installation
- Direct replacement
- Outside Diameter
- 2.00 in
- Inside Diameter
- 0.690 in
- Primary OEM Reference
- 390286 / 0390286
- Product Configuration
- Single impeller; key not included
What’s in the Box
- 1 x Water pump impeller
A separate water-pump key, gasket, O-ring, housing, or complete water-pump service kit is not included unless specifically stated in the order details.
Installation Notes
- Confirm the engine model, year, stroke, and original impeller dimensions before beginning work. Allow the engine to cool completely.
- Disconnect the battery if applicable and follow the engine manufacturer’s service-manual safety procedures.
- Remove the lower unit from the outboard according to the applicable service manual.
- Remove the water-pump housing and carefully remove the old impeller from the driveshaft.
- Inspect the housing, wear plate, drive key, gaskets, and O-rings. Replace worn or damaged related components as required.
- Clean debris and corrosion from the pump cavity and mating surfaces.
- Install the replacement impeller with the drive key correctly seated. Use clean water or a lubricant approved for water-pump impeller installation; do not run the pump dry.
- Reinstall the water-pump housing and related components in the correct order, then tighten fasteners according to the service manual.
- Reinstall the lower unit and reconnect any removed linkages, wiring, or battery connections.
- Run the engine only with an adequate water supply and confirm a steady tell-tale stream. Stop the engine immediately if the cooling-water flow is weak or absent.
Troubleshooting & FAQ
How do I know if this impeller fits my Johnson or Evinrude 40 HP outboard?
Confirm that your engine is a 40 HP 2-stroke Johnson or Evinrude model from 1983–1986 and that its exact model designation appears in the compatibility table. Also compare the original impeller and pump dimensions, including the approximately 2.00-inch outside diameter and 0.690-inch inside diameter.
What are common signs of a failing water-pump impeller?
Common signs include a weak or missing tell-tale stream, overheating, temperature warnings, steam, or damaged, brittle, cracked, or missing impeller vanes during inspection. Do not continue operating an engine that is overheating.
Should the impeller be replaced during routine maintenance?
Inspect the impeller according to the engine manufacturer’s maintenance schedule and replace it whenever it shows wear or damage. Replacement intervals can vary with use, storage conditions, water quality, and the manufacturer’s recommendations.
Does this product include the water-pump key?
No. This listing is for one impeller only. The key is not included, so inspect and reuse the original key only if it is in suitable condition, or obtain the correct replacement separately.
Is this a complete water-pump kit?
No. This is a single replacement impeller, not a complete water-pump repair kit. Housing, wear plate, gaskets, O-rings, and key are not included.
Can this impeller be used on a 4-stroke engine?
The documented fitment for this listing is the specified 40 HP 2-stroke Johnson and Evinrude models from 1983–1986. Do not use it on a 4-stroke engine unless the exact engine catalog and dimensions separately confirm compatibility.
Safety & Important Information
- Verify the complete engine model and year before ordering; horsepower alone is not sufficient to establish fitment.
- Compare the original part, pump housing, drive key, and dimensions before installation.
- Follow the applicable manufacturer service manual and use proper cooling-water supply during testing.
- Professional installation is recommended if you are not familiar with outboard lower-unit or water-pump service.
About Sea Sierra
- Marine Replacement Parts — Practical replacement components for outboard maintenance and repair.
- Application-Focused Listings — Product information is organized around engine model, year, and part-number references.
- Customer Support — Contact support with your engine model and original-part information if you need help comparing fitment.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
