Water Pump Impeller Kit for Johnson/Evinrude 35–50 HP 2-Stroke Outboards
Water Pump Impeller Kit for Johnson/Evinrude 35–50 HP 2-Stroke Outboards is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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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 Kit for Johnson/Evinrude 35–50 HP 2-Stroke Outb...
Water Pump Impeller Kit for Johnson/Evinrude 35–50 HP 2-Stroke Outboards is backordered and will ship as soon as it is back in stock.
Product Details
This water pump impeller kit is designed for selected Johnson and Evinrude 2-stroke outboards using the listed OEM impeller references. Confirm the exact OEM part number and model details before ordering.
Documented applications include the Evinrude/Johnson 35 HP Jet models from 1992–1993, 40 HP models from 1989–1998, 48 HP models from 1989–1996, and 50 HP models from 1989–1998.
- Installs in the lower unit or gear case as part of the outboard cooling-water pump.
- Replaces the listed Johnson/Evinrude and aftermarket impeller references when the application and dimensions match.
- Kit contents are intended for routine water-pump service; verify the contents against the product image before installation.
Part Number Matrix
These are reference numbers associated with this impeller application. They are provided for identification and cross-reference purposes only.
| Brand | Part Number |
|---|---|
| Johnson/Evinrude | 432941 / 0432941 |
| Johnson/Evinrude | 765350 / 0765350 |
| Johnson/Evinrude | 437059 / 0437059 |
| Johnson/Evinrude | 766433 / 0766435 |
| Johnson/Evinrude | 777825 / 0777825 |
| Sierra | 18-3104 / 18-3104-1 |
Engine & Model Compatibility
Keep the horsepower, stroke, model series, and year range together when checking fitment. Matching only one number or a broad horsepower range is not sufficient.
| Brand | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|
| Evinrude/Johnson | 35 HP Jet | 2-Stroke | 1992–1993 | 432941 |
| Evinrude/Johnson | 40 HP | 2-Stroke | 1989–1998 | 432941 |
| Evinrude/Johnson | 48 HP | 2-Stroke | 1989–1996 | 432941 |
| Evinrude/Johnson | 50 HP | 2-Stroke | 1989–1998 | 432941 |
Technical Specs
- Product Type
- Water Pump Impeller Kit
- Application
- Outboard lower unit / gear case water pump
- Engine Type
- Selected Johnson/Evinrude 2-stroke outboards
- Reference OEM Number
- 432941
- Aftermarket Reference
- Sierra 18-3104 / 18-3104-1
What’s in the Box
- 1 × Water pump impeller
- 1 × Drive shaft key
- 1 × Gasket
Package contents can vary by kit configuration. Compare the supplied parts with the product image and your original water-pump components before installation.
Installation Notes
- Disconnect the battery and place the outboard in neutral.
- Remove the fasteners securing the lower unit to the engine housing.
- Carefully lower and separate the gear case from the driveshaft housing.
- Locate the water-pump housing on the gear case and remove its mounting fasteners.
- Remove the old impeller, drive key, and gasket.
- Clean the pump housing, base plate, and sealing surfaces thoroughly.
- Install the new drive shaft key and slide the impeller into position, rotating the driveshaft as needed to seat the vanes.
- Install the new gasket on the clean base plate.
- Reinstall the water-pump housing and tighten the fasteners to the manufacturer’s torque specification.
- Reinstall the lower unit, ensuring correct driveshaft and water-tube alignment, then secure all fasteners.
Troubleshooting & FAQ
How often should I replace my water-pump impeller?
Inspect the impeller during regular maintenance and replace it when it shows wear, cracking, hardening, deformation, or damage. Service intervals may vary with operating hours and exposure to saltwater, sand, or silt; follow the engine manufacturer’s maintenance guidance.
What are the signs of a failing impeller?
Symptoms may include overheating, reduced cooling-water flow, a weak tell-tale stream, or brittle, cracked, or broken impeller vanes.
How can I confirm that this kit fits my engine?
Match your existing impeller or service-manual number with the references listed above, then confirm the complete engine brand, horsepower, stroke, model, and year combination. If the numbers or component design differ, do not assume that the kit is compatible.
Why might different catalogs show different year ranges?
Manufacturers may make running changes or use different model and serial-number breaks. The safest method is to match the OEM number and the complete model information for your specific engine.
Is installation difficult?
Water-pump service requires removal of the lower unit and correct alignment during reassembly. If you are not familiar with outboard repair, have the work performed by a qualified marine technician.
Is this an OEM part?
This listing is for an aftermarket replacement kit. The listed OEM and aftermarket numbers are reference numbers used to help identify the applicable replacement.
Shipping speed and cost
Available shipping methods, delivery estimates, and shipping charges are shown at checkout and may vary by destination.
Warranty and returns
Warranty coverage and return eligibility are governed by the applicable store policies. Contact support with your order details before returning a product.
Safety & Important Info
- Verify the complete engine model, year, stroke, and OEM part number before purchase.
- Inspect the replacement parts and compare them with the original components before installation.
- Do not operate the outboard without confirming that the cooling-water system is correctly assembled and functioning.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended when you do not have the required tools or service information.
About Sea Sierra
- Marine Replacement Parts — Practical replacement components for routine boat and outboard maintenance.
- Application-Focused Listings — Product references and fitment details are provided to support careful part-number matching.
- Customer Support — Contact support if you need help comparing your engine information with the listed application.
Payment & Security
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