Water Pump Impeller – Fits Johnson/Evinrude 28–75 HP Outboards (Replaces 396725, 389557)
Water Pump Impeller – Fits Johnson/Evinrude 28–75 HP Outboards (Replaces 396725, 389557) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
Worry-free returns
Worry-free returns
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.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Water Pump Impeller – Fits Johnson/Evinrude 28–75 HP Outboards (Rep...
Product Details
This high-quality Water Pump Impeller – Fits Johnson/Evinrude 28–75 HP Outboards (Replaces 396725, 389557) is engineered for a wide range of 2-stroke, 4-stroke, and E-TEC engines from 1979 and newer. It offers a reliable and cost-effective solution for maintaining your outboard's cooling system for optimal performance and engine longevity.
It serves as a direct cross-reference for numerous OEM and aftermarket part numbers, including Johnson/Evinrude 396725, Sierra Marine 18-3053-1, GLM 89710, and Mallory 9-45207, ensuring broad compatibility.
- Installation: Designed for a direct OEM-equivalent fit, simplifying the replacement process.
- Material: Constructed from durable, high-performance neoprene with a corrosion-resistant brass hub for extended service life in marine environments.
- Design: Features a bi-directional design that works with both standard and counter-rotating lower units.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Johnson/Evinrude (OEM) | 396725 / 0396725 |
| Johnson/Evinrude (OEM) | 389557 / 0389557 |
| Johnson/Evinrude (OEM) | 432954 / 0432954 |
| Johnson/Evinrude (OEM) | 437080 / 0437080 |
| Johnson/Evinrude (OEM) | 777820 / 0777820 |
| Sierra Marine | 18-3053-1 |
| GLM | 89710 |
| Mallory | 9-45207 / 9-45207-10 |
| CEF | 500303C |
| AM | AM396725 |
| HJB-O | 117 |
| Mercury | 802123 / 802123A1 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Johnson/Evinrude | Various | 28 HP | 2-Stroke | Up to 2005 | 396725 | F-Type Gear Case |
| Johnson/Evinrude | Various | 40 HP | 2-Stroke | 1995–2005 (also 1999 & Up) | 396725/0396725 | F-Type Gear Case |
| Johnson/Evinrude | Various | 45 HP | 2-Stroke | 1986–2001 (COM large housing) | 396725/0396725 | Large housing, F-Type Gear Case |
| Johnson/Evinrude | Various | 50 HP | 2-Stroke | 1998 & Up (also 2005-2013 & Up) | 396725/0396725 | F-Type Gear Case |
| Johnson/Evinrude | Various | 55 HP | 2-Stroke | 1998 & Up (also 1999-2013 & Up) | 396725/0396725 | MFE Models, F-Type Gear Case |
| Johnson/Evinrude | Various | 60 HP | 2-Stroke | 1986 & Up (also 1989-2001, 2005-2013 & Up) | 396725/0396725 | F-Type Gear Case |
| Johnson/Evinrude | Various | 65 HP | 2-Stroke | 1979–2001 (also Commercial 1984 & Up, 1989-1994, 1997-2001) | 396725/0396725 | F-Type Gear Case; Not for AF 65 HP |
| Johnson/Evinrude | Various | 70 HP | 2-Stroke | 1979 & Up (also 1979-1994, 1989-2001) | 396725/0396725 | F-Type Gear Case |
| Johnson/Evinrude | Various | 75 HP | 2-Stroke | 1979–1988 (also 1979-1985) | 396725/0396725 | F-Type Gear Case |
| Johnson/Evinrude | Various | 40 HP | 4-Stroke | 1995–2005 | 396725 | F-Type Gear Case |
| Johnson/Evinrude | Various | 60 HP | 4-Stroke | 1989–2001 | 396725 | F-Type Gear Case |
| Johnson/Evinrude | Various | 60/70 HP | 4-Stroke | 1998 & Up | 396725 | F-Type Gear Case |
| Johnson/Evinrude | Various | 65 HP | 4-Stroke | 1979–2001 | 396725 | F-Type Gear Case |
| Johnson/Evinrude | Various | 70 HP | 4-Stroke | 1979–1994 | 396725 | F-Type Gear Case |
| Johnson/Evinrude | E-TEC | 40 HP | E-TEC | 2004 & Newer (also 2006 & Newer) | 396725 | F-Type Gear Case; Not for E-Tec 60HO |
| Johnson/Evinrude | E-TEC | 50 HP | E-TEC | 2004 & Newer (also 2006 & Newer) | 396725 | F-Type Gear Case |
| Johnson/Evinrude | E-TEC | 60 HP | E-TEC | 2004 & Newer (also 2006 & Newer) | 396725 | F-Type Gear Case |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Direct OEM replacement
- Material
- Neoprene with Brass Hub
- Blades
- 6
- Product Dimensions
- Height: 10.0 cm; Width: 18.0 cm; Length: 25.0 cm
- Weight
- Varies by manufacturer
- Operating Temperature
- -30°C to 120°C (-22°F to 248°F)
- Warranty
- 1-year against manufacturing defects
- Other Attributes
- Bi-directional design works with both standard and counter-rotating engines
What’s in the Box
- 1 x Water Pump Impeller (Replaces 396725 / 432954 / 437080)
- 1 x White Key (0331901)
- 1 x Black Key (0334897)
- 1 x Seal (0324981)
Installation Notes
- Disconnect the battery and drain the gearcase oil.
- Unbolt and carefully lower the gearcase (lower unit) from the outboard's midsection.
- Locate the water pump on top of the gearcase and remove the housing bolts.
- Lift the housing and remove the old impeller, taking note of the vane direction.
- Clean and inspect the pump housing, wear plate, and cup. Replace if excessively scored or warped.
- Install the new gasket and impeller seal.
- Slide the new impeller onto the driveshaft, using the correct key. Rotate the driveshaft clockwise while pushing down to correctly bend the vanes.
- Apply a light coat of marine grease or soapy water to the inside of the housing and reinstall it.
- Torque the housing bolts to the manufacturer's specified value.
- Reinstall the lower unit, ensuring the driveshaft, shift shaft, and water tube are properly aligned.
- Refill the gearcase with the correct type and amount of new lubricant.
- Reconnect the battery. Start the engine in water and verify a strong, consistent stream from the tell-tale port.
Troubleshooting & FAQ
How do I know if this impeller fits my specific engine model?
Check the compatibility table on this page. It lists the supported HP, stroke, and year ranges for Johnson/Evinrude outboards. Always verify your OEM part number against the ones listed in the Part Number Matrix to ensure a perfect match.
What are the signs of a failing water pump impeller?
Common signs include a weak or no water stream from the engine's tell-tale outlet, engine overheating alarms on the console, a "hot" smell, or steam coming from the exhaust when running.
How often should I replace my impeller?
For preventative maintenance, it is recommended to inspect the impeller annually and replace it every 1–2 years or 100–200 hours of use, whichever comes first. Service intervals should be shorter for boats used in saltwater or in water with heavy sediment.
What is the difference between the included white and black keys?
Johnson/Evinrude used different driveshaft key styles over the decades. The inclusion of both common types (white and black) ensures you will have the correct key for your specific model without needing a separate purchase.
My engine still overheats after replacing the impeller. What else could be wrong?
If overheating persists, check for other issues such as a clogged water intake screen, a worn-out water pump housing or wear plate, a stuck or faulty thermostat, or blockages within the engine's internal cooling passages.
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
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
