Water Pump Impeller Kit – Fits Johnson/Evinrude 14-28HP (Replaces 395270, 18-3383)

Water Pump Impeller Kit – Fits Johnson/Evinrude 14-28HP (Replaces 395270, 18-3383)

This water pump impeller repair kit is designed for Johnson and Evinrude outboard engines ranging from 14HP to 28HP 2-Stroke models manufactured between 1979 and 1997. The kit includes a complete set of components to rebuild the water pump assembly in the lower unit.

This kit is a direct replacement for Johnson/Evinrude part numbers 395270, 0395270, 395271, 0395271, 777809, 394393, 0394393, 394394, 0394394, 391390 and aftermarket part numbers Sierra 18-3383, 18-3401, Mallory 9-48212, and GLM 12060.

• Fits a wide range of Johnson and Evinrude 14HP, 25HP, and 28HP 2-stroke models.
• Includes all necessary components for a complete water pump rebuild.
• Engineered for direct OEM replacement fit and performance.

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

Installation Guide

1. Disconnect Power: Start by disconnecting the battery terminals to prevent any electrical accidents.
2. Drain Gear Oil: Place a drain pan under the lower unit and remove the upper and lower gear oil drain screws to drain the lubricant.
3. Remove Lower Unit: Unbolt the lower unit (gearcase) from the outboard's midsection. You may need to disconnect a speedometer tube or shift linkage.
4. Access Water Pump: With the lower unit removed, unbolt and lift the water pump housing to expose the old impeller.
5. Remove Old Components: Take note of the impeller's rotational direction. Remove the old impeller, gaskets, wear plate, and cup.
6. Clean Surfaces: Thoroughly clean all mating surfaces, removing any old gasket material or sealant residue.
7. Install New Components: Place the new gasket and water pump cup into position.
8. Install New Impeller: Slide the new impeller onto the driveshaft. Rotate the shaft in its normal operating direction (usually clockwise) to bend the vanes correctly as you lower the housing over it.
9. Secure Housing: Press the new housing down firmly and secure it with the new bolts, tightening them to the manufacturer's specified torque.
10. Reinstall Lower Unit: Guide the lower unit back into place, ensuring the driveshaft, water tube, and shift shaft align correctly. Bolt it securely.
11. Refill Gear Oil: Pump fresh gearcase oil into the lower drain hole until it seeps out of the upper hole, then replace both screws.
12. Test Operation: Reconnect the battery. Using a water source (flushing muffs), start the engine and confirm a steady stream of water from the "tell-tale" outlet.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my engine?

A: The best way is to verify your engine's model and year against our compatibility table. Also, cross-reference your existing part numbers with those listed in the "Part Number Cross-Reference" section. If you are unsure, contact us with your engine's serial number for assistance.

Q: What are the signs of a failing water pump?

A: The most common signs include the engine overheating at idle or low speeds, and a weak or nonexistent water stream from the tell-tale outlet. Reduced engine performance can also be an indicator.

Q: How often should the water pump impeller be replaced?

A: As a preventative maintenance measure, we recommend replacing the impeller every 1 to 2 years or every 100-200 hours of use, depending on operating conditions (e.g., saltwater vs. freshwater).

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.