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 is designed for Johnson/Evinrude 85–235 HP V4 & V6 hydraulic shift outboard engines from 1976–1978. It provides a complete solution for replacing the entire water pump assembly to maintain proper engine cooling.

This kit is a direct replacement for multiple OEM and aftermarket part numbers, including Johnson/Evinrude (BRP) 395073, 388644, 389158, and 777813; Sierra 18-3393; GLM 12101; Mallory 9-48208; and others.

• Installs in the outboard's lower unit.
• Includes all necessary gaskets, seals, and hardware for a full replacement.
• Features a half-moon style impeller key, specific to these hydraulic shift models.

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. Safety First: Disconnect the battery and remove the propeller before starting.
2. Drain Gear Lube: Place a drain pan under the lower unit and remove the upper and lower drain screws to drain the gearcase oil.
3. Remove Lower Unit: Remove the bolts securing the lower unit (gearcase) to the engine's midsection. Carefully lower the unit.
4. Access Pump: The water pump is located on top of the lower unit, surrounding the driveshaft.
5. Disassemble Old Pump: Remove the bolts holding the pump housing. Slide the housing and old impeller off the driveshaft.
6. Clean Surfaces: Remove the old wear plate and gaskets. Thoroughly clean the mounting surfaces, ensuring they are free of old gasket material and corrosion.
7. Install New Components: Place the new gaskets and wear plate. Install the new half-moon key into the driveshaft and slide the new impeller on, turning it clockwise to seat the vanes.
8. Secure New Housing: Apply a light coat of marine grease to the inside of the new pump cup, then install it and the housing over the impeller. Secure with the new bolts and tighten to the manufacturer's torque specs.
9. Reinstall Lower Unit: Guide the lower unit back into place, ensuring the driveshaft, shift shaft, and water tube align correctly. Reinstall and tighten the mounting bolts.
10. Refill Gear Lube: Pump fresh marine gear lube into the lower drain hole until it seeps out of the upper vent hole. Reinstall both screws.
11. Test Operation: Reconnect the battery. Start the engine using a water source (flushing muffs or in water) and check for a strong, steady stream from the tell-tale outlet.

Troubleshooting & FAQ

Q: How do I confirm this kit will fit my engine?
A: This kit is specifically for Johnson/Evinrude V4 and V6 outboards with hydraulic shift from 1976–1978. Please verify your engine's model, horsepower, and year against the compatibility table. If you are unsure, use the Johnson/Evinrude serial number guide linked above.

Q: What are the common signs that my water pump needs to be replaced?
A: The most common signs of a failing water pump are a weak or non-existent water stream from the engine's tell-tale outlet and the engine overheating, which may trigger an alarm.

Q: How often should I replace my water pump impeller?
A: For preventative maintenance, it is recommended to replace your water pump impeller and gaskets every 1 to 2 years (or every 100-200 operating hours), regardless of visible wear. Proactive replacement prevents overheating and costly engine damage.

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.