Water Pump Impeller – Fits Johnson/Evinrude 40–75 HP (Replaces 396725, 389557)
Water Pump Impeller – Fits Johnson/Evinrude 40–75 HP (Replaces 396725, 389557) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Water Pump Impeller – Fits Johnson/Evinrude 40–75 HP (Replaces 3967...
Water Pump Impeller – Fits Johnson/Evinrude 40–75 HP (Replaces 396725, 389557) is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket Water Pump Impeller – Fits Johnson/Evinrude 40–75 HP (Replaces 396725, 389557) is designed for Johnson & Evinrude 2-Stroke engines from 40–75 HP (1979–2006). It also fits select 60 HP 4-Stroke models (1989–2001) and 40–60 HP E-TEC outboard models.
This impeller is a direct replacement for multiple OEM and aftermarket part numbers, including Johnson/Evinrude 396725, Mercury 802123, and Sierra 18-3053-1.
- Designed for direct, factory-style fitment.
- Constructed from durable neoprene for reliable performance in marine environments.
- Includes the drive key for a complete installation (verify package contents).
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Johnson/Evinrude | 396725 |
| Johnson/Evinrude | 389557 |
| Johnson/Evinrude | 432952 |
| Johnson/Evinrude | 437080 |
| Johnson/Evinrude | 0396725 |
| Johnson/Evinrude | 0432952 |
| Johnson/Evinrude | 0437080 |
| Mercury | 802123 |
| Mercury | 802123A1 |
| Sierra | 18-3053-1 |
| GLM | 89710 |
| Mallory | 9-45207 |
| CEF | 500303C |
Engine & Model Compatibility
Confirm your engine model/year in the table below. This impeller fits a wide range of Johnson and Evinrude engines, including 2-stroke, 4-stroke, and E-TEC models.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Johnson | 40HP | 40 | 2-Stroke | 1995–2005 | 396725 | |
| Johnson | 45HP COM | 45 | 2-Stroke | 1986–2001 | 396725 | Large housing |
| Evinrude | 40HP | 40 | 2-Stroke | 1995–2005 | 396725 | |
| Johnson | 65HP | 65 | 2-Stroke | 1979–2001 | 396725 | |
| Evinrude | 65HP | 65 | 2-Stroke | 1979–2001 | 396725 | |
| Johnson | 70HP | 70 | 2-Stroke | 1979–1994 | 396725 | |
| Evinrude | 70HP | 70 | 2-Stroke | 1979–1994 | 396725 | |
| Johnson | 75HP | 75 | 2-Stroke | 1979–1988 | 396725 | |
| Evinrude | 75HP | 75 | 2-Stroke | 1979–1988 | 396725 | |
| Johnson | 60HP | 60 | 4-Stroke | 1989–2001 | 396725 | |
| Evinrude | 60HP | 60 | 4-Stroke | 1989–2001 | 396725 | |
| Johnson | 60/70HP | 60/70 | 4-Stroke | 1998+ | 396725 | |
| Evinrude | 60/70HP | 60/70 | 4-Stroke | 1998+ | 396725 | |
| Johnson | 40/50/60HP | 40/50/60 | E-TEC | 2004+ | 396725 | |
| Evinrude | 40/50/60HP | 40/50/60 | E-TEC | 2004+ | 396725 |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Direct replacement
- Dimensions
- A: 19.13 mm, B: 91.5 mm, C: 25.4 mm
- Material
- Neoprene (rubber)
- Blade Configuration
- 6 blades
- Color
- Black
- Key Included
- Yes (with some packages)
- Other Technical Attributes
- Factory OEM-style replacement
What’s in the Box
- 1 x Water Pump Impeller (0396725)
- 1 x Key (0334897) - included with some packages
Installation Notes
- Disconnect the battery and remove the lower unit from the outboard motor.
- Unbolt and remove the water pump housing. Note the blade orientation of the old impeller.
- Remove the old impeller, gaskets, and drive key.
- Thoroughly clean the water pump housing and wear plate surfaces.
- Install the new drive key and lubricate the new impeller with a marine-safe lubricant.
- Install the new impeller, turning the driveshaft clockwise to bend the blades into the correct orientation.
- Reinstall the water pump housing with new gaskets and torque bolts to manufacturer specifications.
- Reattach the lower unit, reconnect the battery, and test the engine with a water supply to ensure proper cooling system function.
Troubleshooting & FAQ
How do I know if this impeller fits my specific engine model?
While this impeller fits a wide range of 40–75 HP Johnson/Evinrude models, it's critical to verify your engine's part number. Cross-reference the numbers in our Part Number Matrix and check the compatible models in the Engine Compatibility table. When in doubt, compare images to your old part.
What are the signs of a failing impeller?
Common signs include the engine overheating at idle or low speeds, a weak or non-existent "telltale" water stream, or brittle/cracked blades on the old impeller upon inspection.
How often should I replace my water pump impeller?
For preventative maintenance, it is recommended to inspect your impeller annually and replace it every 1-2 years or every 100-200 hours of operation, depending on usage conditions (e.g., saltwater vs. freshwater).
Does this impeller come with the drive key?
Yes, most packages include the required drive key (part 0334897). However, please check the "What’s in the Box" section for confirmation, as packaging can vary.
What's the difference between this impeller and the OEM version?
This is an aftermarket part designed to meet or exceed OEM specifications. It is made from high-quality neoprene for durability, offering reliable performance at a great value.
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.
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