432941 Water Pump Impeller for Evinrude Johnson E40 TE40 VE40 E48 VE48 E50 TE50 VE50 J40 TJ40 J48 VJ48 J50 TJ50 VJ50 | JLM Marine

Water Pump Impeller 432941 – Fits Evinrude Johnson 40-50 HP Outboard Engines

This premium aftermarket water pump impeller is designed for Evinrude Johnson outboard motors rated 35-50 HP, including Jet, standard, and VRO models from 1989 to 1998. Engineered to OEM specifications, it ensures reliable coolant circulation to keep your engine running at optimal temperature.

Direct replacement for OEM part number 432941, and cross-compatible with Sierra 18-3104, CEF 500372, and Mallory 9-45204. This impeller fits a wide range of Evinrude E-series and Johnson J-series motors, making it a versatile choice for maintenance and repairs.

• Includes impeller with key/pin for complete installation
• Made from marine-grade neoprene rubber for superior chemical and corrosion resistance
• 3-blade design ensures continuous, efficient coolant flow

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Johnson/Evinrude owners, here's a guide to help you identify your engine's serial/model: Johnson/Evinrude Serial Number Guide.

Technical Specifications

Package Contents

• 1 × Outboard Rubber Impeller with Key/Pin

Installation Guide

1. Disconnect the fuel line and remove the lower unit from the outboard motor following your engine's service manual.
2. Remove the water pump housing by unscrewing the retaining bolts. Take note of the orientation of the old impeller.
3. Carefully extract the old impeller from the pump housing; inspect the housing for debris or damage.
4. Clean the pump housing thoroughly with a mild solvent and dry completely.
5. Apply a thin coat of water-resistant grease to the impeller blades and inner housing surface.
6. Insert the key/pin into the impeller shaft slot, ensuring it is seated properly.
7. Rotate the impeller blades in the direction of pump rotation and carefully slide it into the housing. All blades should flex in the same rotational direction.
8. Reinstall the water pump housing and tighten bolts to the manufacturer's torque specifications.
9. Reattach the lower unit to the motor, aligning the drive shaft and water tube.
10. Reconnect the fuel line and perform a water pump flow test before launching. Check for leaks and consistent water stream from the telltale.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my engine?
A: Cross-reference your engine model and year in the compatibility table above. Also verify that your original impeller matches OEM part number 432941 or the cross-reference numbers (Sierra 18-3104, CEF 500372, Mallory 9-45204).

Q: How often should I replace the water pump impeller?
A: Most manufacturers recommend replacing the impeller every 2-3 years or 200-300 hours of operation, whichever comes first. If you notice reduced cooling performance or irregular water flow from the telltale, inspect and replace immediately.

Q: What are the common signs of a failing impeller?
A: Warning signs include weak or no water discharge from the telltale port, engine overheating, steam from the exhaust, or loss of power. Impellers can crack, lose blades, or become brittle over time.

Q: Can I run the engine out of water to test the impeller?
A: No. Running an outboard without water—even for a few seconds—can damage the impeller and overheat the engine. Always use a flushing adapter or test tank with water when testing.

Q: Is this an OEM or aftermarket part?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.