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

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

This high-performance water pump impeller is designed for Evinrude Johnson outboard motors ranging from 35HP Jet to 50HP models. Engineered to ensure a continuous supply of coolant to your engine, this critical component helps maintain optimal operating temperatures and prevents overheating damage.

Direct Replacement for OEM Part Number: 432941. This impeller is also compatible with Sierra 18-3104, CEF 500372, and Mallory 9-45204, offering broad aftermarket coverage for your Johnson Evinrude OMC outboard.

• Constructed from marine-grade neoprene rubber for superior chemical and corrosion resistance
• 3-blade design engineered for high-performance cooling efficiency
• Essential spare part recommended to carry on board for peace of mind

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 Serial Number Guide.

Technical Specifications

Package Contents

Your purchase includes:

• 1 × Outboard Water Pump Impeller (Replacement for Johnson Evinrude OMC OEM P/N# 432941)

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 bolts and carefully separate the housing to access the old impeller.
3. Extract the worn impeller from the pump housing, noting the orientation of the blades.
4. Inspect the pump housing and liner for wear, scoring, or damage; replace if necessary.
5. Lubricate the new impeller and housing with glycerin or soapy water (never use petroleum-based lubricants).
6. Install the new impeller onto the driveshaft, ensuring blades are oriented in the correct rotation direction.
7. Carefully slide the pump housing over the impeller, taking care not to damage the blades.
8. Reinstall all housing bolts and torque to manufacturer specifications.
9. Reattach the lower unit to the outboard motor and reconnect all components.
10. Test the cooling system by running the engine in water and verifying proper water discharge from the tell-tale.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my engine?
A: Verify your engine model and year against the compatibility table above. Additionally, compare the OEM part number 432941 with your original impeller's part number to ensure a proper match.

Q: How often should I replace my 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 frequently operate in sandy or debris-filled water, inspect and replace more often.

Q: What are the signs that my impeller is failing?
A: Common symptoms include overheating, reduced or no water flow from the tell-tale, loss of engine power, and steam from the engine. If you notice any of these signs, inspect and replace the impeller immediately to prevent engine damage.

Q: Can I use petroleum-based grease when installing this impeller?
A: No, never use petroleum-based products as they will damage the neoprene rubber. Always use glycerin, soapy water, or a water-based lubricant specifically designed for impeller installation.

Q: What's the difference between OEM and aftermarket impellers?
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.