Water Pump Impeller Kit – Fits Johnson/Evinrude 14HP, 18HP, 25HP & 28HP (Replaces 395270)

Water Pump Impeller Kit – Fits Johnson/Evinrude 14HP, 18HP, 25HP & 28HP (Replaces 395270)

This water pump impeller repair kit provides a reliable solution for maintaining the cooling system on a range of Johnson and Evinrude outboard engines. It is designed to fit specific 14HP, 18HP, 25HP, and 28HP 2-Stroke models produced between 1979 and 2005.

Engineered as a direct replacement for multiple OEM and aftermarket part numbers, this kit ensures proper fit and function, restoring your engine's cooling performance. It includes all necessary components for a complete water pump overhaul.

• Complete Repair Kit: Includes the impeller, housing, cup, gasket, grommet, and bolts for a full service.
• Installation Location: Mounts on the lower unit of the outboard engine.
• Direct Fitment: Designed to replace Johnson/Evinrude part number 395270 and other equivalents without modification.

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 Water Pump Impeller (Replaces 395289, 18-3051)
• 1 x Housing (Replaces 330560, 18-3363)
• 1 x Water Pump Cup (Replaces 328751, 18-3358)
• 1 x Impeller Housing Gasket (Replaces 329390, 18-3360)
• 1 x Grommet (Replaces 302497, 18-3329)
• 4 x Bolts (Replaces 331979, 18-3133)

Installation Guide

1. Safety First: Disconnect the battery and remove the spark plug wires to prevent accidental starting.
2. Drain Gearcase Oil: Place a drain pan under the lower unit and remove the upper and lower gearcase plugs to drain the oil.
3. Remove the Lower Unit: Unbolt the lower unit from the engine housing. You may also need to disconnect the shift linkage.
4. Access the Water Pump: With the lower unit removed, unbolt and remove the water pump housing to expose the impeller.
5. Inspect and Remove Old Parts: Take note of the old parts' orientation. Remove the old impeller, key, cup, and gaskets. Clean all surfaces thoroughly.
6. Install New Components: Install the new gasket, cup, and impeller. Ensure the impeller key is in place and the vanes are oriented correctly (typically clockwise).
7. Reassemble Pump Housing: Lightly grease the inside of the housing and slide it down over the impeller while turning the driveshaft clockwise. Secure with the new bolts.
8. Reattach Lower Unit: Reinstall the lower unit, ensuring the driveshaft, water tube, and shift shaft align correctly. Tighten bolts to the manufacturer's torque specs.
9. Refill Gearcase Oil: Fill the gearcase with fresh marine gear lube from the bottom plug until it seeps out the top plug, then replace both plugs.
10. Final Checks: Reconnect the battery and start the engine in water. Verify a steady stream of water is exiting the tell-tale port.

Troubleshooting & FAQ

How do I confirm this kit fits my engine?
Start by checking your engine's model number and year against the detailed compatibility chart above. This kit is a direct replacement for multiple OEM part numbers, including Johnson/Evinrude 395270. Verifying your part number is the most reliable method.

What are the signs of a failing water pump impeller?
Key signs include the engine overheating, an alarm sounding (if equipped), or a weak/non-existent water stream from the "telltale" outlet port. Visually, a worn impeller may have cracked, brittle, or completely broken vanes.

How often should I replace the water pump impeller?
For preventative maintenance, it is recommended to inspect the impeller annually and replace it every 1-2 years or every 100-200 hours of use. Replacement frequency should be increased if you operate in saltwater or water with high levels of sand or silt.

OEM vs. Aftermarket?
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.