Water Pump Impeller Kit with Housing – Fits Johnson/Evinrude V4 & V6 Outboards (Replaces 395073, 388644, 389158, 777813)

Water Pump Impeller Kit with Housing – Fits Johnson/Evinrude V4 & V6 Outboards

This water pump impeller repair kit includes the housing and is designed for Johnson and Evinrude 85–235 HP V4 & V6 outboard engines with hydraulic shifts from 1976–1978. It provides all necessary components for a complete overhaul of the lower unit water pump.

This kit is a direct replacement for Johnson/Evinrude OEM part numbers 395073, 388644, 389158, and 777813, ensuring proper fit and function for the specified vintage models.

• Includes a complete set of components: impeller, housing, wear plate, gaskets, seals, and bolts.
• Specifically designed for V4 & V6 hydraulic shift models manufactured between 1976 and 1978.
• Features the required half-moon style impeller key for proper installation on these engines.

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 x Cup & Plate Assembly
• 1 x Impeller
• 1 x Impeller Gasket (325537)
• 1 x Pump Housing
• 1 x Wear Plate
• 4 x Install Bolts
• 1 x Key (Half-moon style)
• 1 x Seal
• 3 x O-Rings
• 3 x Gaskets

Installation Guide

1. Prepare the Engine: Disconnect the negative battery cable for safety. Remove the shift linkage connection to the lower unit.
2. Remove Lower Unit: Loosen and remove the bolts securing the lower unit (gearcase) to the upper casing. Carefully lower and remove the unit.
3. Access the Water Pump: With the lower unit removed, locate the water pump assembly on top. Unscrew the bolts holding the pump housing in place.
4. Disassemble Old Pump: Remove the old housing, impeller, wear plate, gaskets, and seals. Take note of the order of components.
5. Clean Surfaces: Thoroughly clean the mounting base and driveshaft. Ensure no old gasket material or debris remains.
6. Install New Components: Place the new gasket and wear plate onto the lower unit. Slide the half-moon key into the driveshaft slot.
7. Install Impeller: Align the new impeller with the key and slide it down. Rotate the driveshaft clockwise to seat the impeller vanes correctly inside the new housing cup.
8. Secure Housing: Place the new housing over the impeller and bolt it down evenly, tightening to the manufacturer's torque specifications.
9. Reinstall Lower Unit: Guide the lower unit back into place, ensuring the driveshaft, water tube, and shift shaft align correctly. Secure with bolts.
10. Final Checks: Reconnect the shift linkage and battery. Start the engine using a water supply (flushing muffs) and verify a steady stream from the telltale outlet.

Troubleshooting & FAQ

Q: How do I confirm this kit will fit my Johnson/Evinrude engine?
A: This kit is specifically made for V4 and V6 hydraulic shift outboards from 1976–1978. It's critical that your engine has a hydraulic shift mechanism, as this kit will not work with mechanical shift models. Please review the detailed "Compatible Engine Models" table to match your specific model and year before ordering.

Q: What are the common symptoms of a failing water pump that this kit would fix?
A: Key indicators include the engine overheating (especially at idle), a weak or nonexistent water stream from the "telltale" exhaust port, or a melted water pump housing. If you find brittle, cracked, or missing vanes on your old impeller, a full replacement is needed.

Q: How does this aftermarket kit compare to an original OEM part?
A: This is a high-quality aftermarket kit designed to meet or exceed OEM specifications for fit and performance. It includes all the necessary components for a complete pump rebuild, including the housing and the specific half-moon style key required for these vintage hydraulic shift engines.

Q: How often should I replace my water pump impeller and housing?
A: As a general rule for preventative maintenance, you should inspect the impeller annually and plan for a full replacement every 2-3 years or 200-300 hours of operation. This interval can be shorter if you frequently operate in sandy, silty, or saltwater environments.

Q: OEM vs. Aftermarket?
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.