Water Pump Impeller Repair Kit – Fits Johnson/Evinrude V4/V6/V8 90-225 HP (Replaces 5001594, 390768)

Water Pump Impeller Repair Kit – Fits Johnson/Evinrude V4/V6/V8 90-225 HP

This water pump impeller repair kit provides a comprehensive solution for servicing the cooling system on a wide range of Johnson and Evinrude V4, V6, and V8 outboard engines from 1979 to 2006, including both 2-Stroke and looper models from 85 HP to 300 HP.

It serves as a direct replacement for multiple OEM and aftermarket part numbers, ensuring broad compatibility and restoring original performance. All components are manufactured from marine-grade materials for durability and corrosion resistance.

• Installation: Direct fit replacement for a straightforward installation.
• Complete Kit: Includes a new housing, impeller, gaskets, plates, and all necessary hardware.
• Fuel Compatibility: Designed for use with gasoline-powered marine outboard 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

This comprehensive kit includes all components needed for a full water pump rebuild:

• 1 x Cup, Insert (338486)
• 1 x Housing (435485)
• 1 x Gasket (338484)
• 1 x Plate, Outer Wear (338485)
• 1 x Seal (331353)
• 1 x Impeller Kit (5001593/777816)
• 1 x Cover (354578)
• 1 x O-Ring (302035)
• 1 x Sleeve, Extension 25" & 30" Models (354580/338637)
• 1 x Grommet, Water Tube to Cover (314008)
• 1 x Grommet, Pump to Exhaust Housing (320943)
• 2 x Screw (306643)
• 4 x Screw (302325)
• 1 x Install Instructions

Installation Guide

Follow the included instructions for detailed steps. A general guide is as follows:

1. Disconnect Power: Disconnect the battery before beginning work.
2. Remove Lower Unit: Drain the gearcase oil and unbolt the lower unit (gearcase) from the midsection.
3. Access Pump: With the lower unit removed, unbolt and detach the old water pump housing to access the impeller.
4. Clean Surfaces: Thoroughly clean the mounting surfaces of any old gasket material or debris.
5. Assemble Kit: Assemble the new components from the kit, including the insert cup, plate, gaskets, and seals, inside the new housing.
6. Install Impeller: Slide the new impeller onto the driveshaft, ensuring the fins are oriented in the correct rotational direction.
7. Reinstall Housing: Secure the new housing assembly over the impeller, ensuring all gaskets are aligned. Torque bolts to manufacturer specifications.
8. Reattach Lower Unit: Reinstall the lower unit, refill the gearcase oil, and reconnect all linkages.
9. Test Operation: Reconnect the battery and test the engine in water to confirm proper water flow from the tell-tale outlet.

Troubleshooting & FAQ

How do I confirm this kit fits my engine?
Start by checking your engine's model, year, and HP against our compatibility table. You can also use the Part Number Cross-Reference table to match your existing part number with the numbers this kit replaces. When in doubt, consult your service manual or a professional mechanic.

What are the signs of a failing water pump impeller?
Common symptoms include the engine overheating at idle or low speeds, a weak or non-existent water stream from the "tell-tale" outlet, and a melted water pump housing. Proactive replacement is recommended to avoid engine damage.

How often should I replace the water pump impeller?
For preventative maintenance, it is recommended to inspect and/or replace the water pump impeller every 1-2 years or every 100-200 hours of operation, depending on usage conditions (e.g., more frequently in saltwater or sandy/silty environments).

Is this an OEM part or an aftermarket replacement?
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.

How fast do you ship and how much does it cost?
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.

What is your warranty and return policy?
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.