Water Pump Impeller Repair Kit – Fits Johnson/Evinrude 35-60 HP (Replaces 439077, 396933)

$45.00

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Water Pump Impeller Repair Kit – Fits Johnson/Evinrude 35-60 HP (Replaces 439077, 396933) is backordered and will ship as soon as it is back in stock.

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You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

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If you have any questions, feel free to email us at info@sierramarines.com, and we’ll get back to you within 20–36 hours.

Product Details

This Water Pump Impeller Repair Kit is designed for Johnson/Evinrude 35-60 HP, 2-Stroke outboard engines manufactured between 1979 and 1994. It provides all the necessary components for a complete water pump rebuild, restoring cooling performance and engine reliability.

It serves as a direct replacement for Johnson/Evinrude OEM part numbers 439077, 0439077, 396933, and 0396933, and interchanges with Sierra 18-3399 and Mallory 9-48207.

Engineered for direct-fit installation.
Includes all essential components for a full water pump service.
Constructed from durable metal alloy and high-grade neoprene rubber.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number
Johnson/Evinrude	439077 / 0439077
Johnson/Evinrude	396933 / 0396933
Sierra	18-3399
Mallory	9-48207

Engine & Model Compatibility

Confirm your engine model/year in the table below.

This kit is specifically designed for the following Johnson/Evinrude outboard models.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
Johnson/Evinrude	Outboard	35	2-Stroke	1986–1987	439077
Johnson/Evinrude	Outboard	40	2-Stroke	1984–1988	439077
Johnson/Evinrude	Outboard	45	2-Stroke	1986–1994	439077
Johnson/Evinrude	Outboard	48	2-Stroke	1987–1988	439077
Johnson/Evinrude	Outboard	50	2-Stroke	1979–1988	439077
Johnson/Evinrude	Outboard	55	2-Stroke	1979–1994	439077	Excludes 1982 models
Johnson/Evinrude	Outboard	60	2-Stroke	1980–1985	439077

Technical Specs

Product Type: Water Pump Impeller Repair Kit
Installation: Direct replacement
Housing Material: Metal alloy with neoprene rubber components
Housing Color: Silver/Black
Fitting Type: Direct fit
Other Technical Attributes: Complete water pump rebuild kit

What’s in the Box

1 x Water Pump Impeller (777214/396809)
2 x Impeller Key Wedge (Black and White)
1 x Housing (384087/18-3336)
1 x Liner (320775)
1 x Plate (320776)
1 x Wear Plate (320981/18-3343)
1 x Gasket (336530/18-2709)
1 x O-Ring (339543/303059/18-7134)
1 x Grommet, Water Tube (315837/18-3337)
1 x Housing Grommet (341732)
1 x Seal (315788)
1 x Bracket (315838)
2 x Screw (Short) (319126/18-3369)
2 x Screw (Long) (909533/18-3365)

Installation Notes

Disconnect the battery cables and ensure the engine is cool before starting.
Remove the lower unit (gearcase) from the outboard motor.
Unbolt and remove the old water pump housing to access the impeller.
Carefully inspect the orientation of the old components before removing them.
Thoroughly clean all mating surfaces, removing any old gasket residue or corrosion.
Install the new wear plate, seals, and gaskets as provided in the kit.
Slide the new impeller onto the driveshaft, aligning the keyway and inserting the correct key.
Lubricate the impeller and the inside of the new housing with marine grease.
Install the new housing and tighten the bolts to the manufacturer's specified torque.
Reinstall the lower unit onto the outboard.
Reconnect the battery and test the engine in water, checking for a strong, steady stream from the water pump indicator (tell-tale).

Troubleshooting & FAQ

How do I confirm this kit fits my specific engine?

The best way is to check the Part Number Matrix and Engine & Model Compatibility tables on this page against your engine's model, year, and original part number. If your information matches, the kit will fit.

What are the signs of a failing water pump impeller?

Common signs include a weak or non-existent water stream from the "tell-tale" outlet, engine overheating alarms, and reduced engine performance. Visible signs on the old impeller include cracked, brittle, or missing vanes.

How often should I replace my 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, depending on operating conditions (especially in saltwater or sandy/silty water).

Is this a complete kit for a full rebuild?

Yes, this is a comprehensive kit that includes the impeller, housing, plate, gaskets, seals, and hardware required for a full water pump service. Refer to the "What’s in the Box" section for a complete list of contents.

Do I need special tools for installation?

Standard mechanical tools, such as a socket/ratchet set and torque wrench, are required. A marine-safe lubricant for the impeller and gasket sealer may also be necessary. Professional installation is recommended if you are not experienced with outboard maintenance.

Why are there two different impeller keys included?

Different engine models and production years sometimes used slightly different key types. This kit includes both common variants (black and white) to ensure compatibility across the listed application range. Use the key that matches your original part.

OEM vs. Aftermarket?

This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.

Shipping speed & cost?

We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.

Warranty & returns?

Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.

Safety & Important Info

Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
This is an aftermarket replacement, not an OEM component.
Professional installation is recommended for safety and performance.

About Sea Sierra

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Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.

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