# 396725 Evinrude Johnson Impeller and Key Assembly | Genuine OEM BRP Outboard Part

## 🔧 Product Description

**Genuine BRP Evinrude Johnson Water-Pump Impeller and Drive-Key Assembly - Part Number: 0396725**

A genuine BRP flexible water-pump impeller for selected Johnson and Evinrude 40HP through 70HP two-stroke outboards, with additional applications determined by the fitted gearcase.

The impeller rotates inside the stainless water-pump cup and draws cooling water through the lower-unit intake. It is normally installed with drive key 0331107, which locks the impeller to the driveshaft. Sierra packages its corresponding replacement with the drive key included.

## ⚙️ Key Features

-   Genuine BRP six-blade water-pump impeller
-   Correct OEM reference 0396725
-   Flexible neoprene-style impeller construction
-   Driven directly by the vertical driveshaft
-   Sierra, GLM and Mallory replacements available

## 🚤 Compatibility

### Commonly used on

-   Johnson and Evinrude midrange two-stroke outboards
-   Standard mechanical-shift gearcases
-   Water pumps using the large six-blade impeller

### Typically suits

-   Engine models:
-   Johnson / Evinrude 40HP
-   Johnson / Evinrude 45HP commercial and jet applications where specified
-   Johnson / Evinrude 50HP
-   Johnson / Evinrude 55HP
-   Johnson / Evinrude 60HP
-   Johnson / Evinrude 65HP
-   Johnson / Evinrude 70HP
-   Selected 75HP engines using the same water-pump housing
-   HP Range: Primarily 40HP - 70HP, with selected 75HP applications
-   Engine Type: Inline two- or three-cylinder two-stroke outboard
-   Year Range: Primarily late-1970s through early-2000s, dependent on gearcase

## 🔌 Function

The impeller creates the suction and pressure needed to circulate raw cooling water through the powerhead, exhaust passages and thermostat system.

## ⚠️ Common Signs of Failure

-   Weak or absent tell-tale stream
-   Engine overheats at idle or low speed
-   Impeller blades are cracked or permanently curved
-   Rubber fragments appear in cooling passages
-   Impeller hub spins without turning the blades
-   Drive key is worn, sheared or missing
-   Water-pump pressure falls at higher rpm
-   Impeller has taken a permanent set after storage

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   0396725 later OMC / BRP impeller reference
-   0389557 earlier related impeller reference

### OEM / Related Numbers

-   0396725
-   396725
-   0389557
-   389557
-   Impeller drive key: 0331107
-   Sierra drive key: 18-3299
-   Related three-blade impeller: 0437059

### Aftermarket / Verified Equivalents

-   Sierra: 18-3053-1
-   Sierra: 18-3053
-   GLM: 89710
-   Mallory: 9-45207
-   Mallory: 9-45207-10
-   HJB / aftermarket reference: O-117

## 📦 Condition

-   Genuine BRP part
-   Brand new
-   Supplied in original or equivalent packaging

## Details

- **Price:** 82.3 AUD
- **Vendor:** BRP (Evinrude/Johnson)
- **Type:** Pumps
- **Tags:** BRP (Evinrude/Johnson)

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 82.30 AUD | In stock |

## Images

- 396725 Evinrude Johnson Impeller and Key Assembly | Genuine OEM BRP Outboard Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/396725-impeller-and-key-assembly)
> Updated: 2026-09-05