Water Pump Impeller Kit – Fits Johnson/Evinrude 14-28 HP Outboards (Replaces 395270/395271)

Water Pump Impeller Kit – Fits Johnson/Evinrude 14-28 HP Outboards

This complete water pump impeller kit provides a reliable solution for maintaining the cooling system on Johnson and Evinrude outboard engines. It is designed as a direct replacement for original parts on 14HP, 18HP, 25HP, and 28HP 2-stroke engines manufactured between 1984 and 1997.

This assembly replaces Johnson/Evinrude part numbers 395270, 395271, 777809, 394393, 394394, and 391390.

• Installation Location: Lower Unit / Gearcase
• Materials: Features a durable plastic/composite housing and a robust rubber impeller to ensure longevity and performance.
• Complete Kit: Includes the housing, impeller, wear plate, and all necessary gaskets, o-rings, and bolts for a full service.

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 Impeller (Replaces 395289 / 18-3051)
• 1 x Housing (Replaces 330560 / 18-3363)
• 1 x Pump Cup (Replaces 328751 / 18-3358)
• 1 x Gasket (Replaces 329390 / 18-3360)
• 1 x Grommet (Replaces 302497 / 18-3329)
• 4 x Bolts (Replaces 331979 / 18-3133)
• 2 x O-rings (Replaces 301967 / 18-7440-1)
• 1 x Wear Plate
• 1 x Impeller Key

Installation Guide

1. Disconnect the battery and remove the propeller.
2. Drain the gearcase oil from the lower unit.
3. Unbolt and carefully remove the lower unit (gearcase) from the outboard's driveshaft housing.
4. Locate and remove the bolts securing the water pump housing.
5. Slide the old water pump assembly off the driveshaft, noting the position of all components.
6. Clean the mating surfaces on the gearcase and driveshaft.
7. Assemble the new kit components in reverse order, starting with the new gasket and wear plate.
8. Install the new impeller, ensuring the key is in place and the vanes are oriented correctly (typically clockwise).
9. Slide the new housing over the impeller. You may need to rotate the driveshaft to align the impeller vanes.
10. Install the new pump cup, o-rings, and grommet as required.
11. Securely fasten the new housing with the provided bolts, tightening to the manufacturer's torque specifications.
12. Reinstall the lower unit, refill with fresh gearcase oil, and re-attach the propeller before testing.

Troubleshooting & FAQ

Q: How do I confirm this kit will fit my engine?
A: The best way to ensure fitment is to check your engine's model number against our detailed compatibility table. Even if your engine's horsepower and year are listed, the model number is the most accurate way to confirm. You can also compare your old part numbers to those in our cross-reference list.

Q: How often should I replace the water pump impeller?
A: For optimal performance and to prevent overheating, it's recommended to inspect the impeller annually and replace it every 2-3 years or after 200-300 hours of use, depending on operating conditions (e.g., saltwater vs. freshwater).

Q: What are the signs of a failing water pump?
A: Common symptoms include the engine overheating at idle or low speeds, a weak or non-existent stream of water from the "telltale" outlet, and visible cracking or brittleness on the old impeller's rubber vanes during inspection.

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.