Bring new life to your classic Johnson or Evinrude outboard with this replacement impeller designed for 40 HP and 50 HP models from the late 1970s to late 1980s. These older twin-cylinder engines (such as those produced between 1977 and 1988) require a well-functioning water pump to stay cool, especially since many lacked modern temperature warning systems. This high-quality impeller is an exact match to the original (replacing OEM part number 396809), so it fits perfectly in the pump housing and restores optimal water circulation.
Each impeller comes with a new drive key to lock it onto the shaft – an important detail to ensure proper installation. By replacing your worn or cracked impeller, you’ll help your vintage 40–50HP outboard maintain stable operating temperatures during fishing, cruising, or towing. It’s a simple fix that can prevent severe overheating damage in older engines, allowing you to continue using your trusted Johnson/Evinrude motor for years to come.
- For Vintage 2-Cylinder Outboards: Tailored for older Johnson/Evinrude 40HP and 50HP 2-stroke engines common in the 1980s. Ensures these classic motors have adequate cooling as originally designed by OMC.
- Complete Replacement Kit: Comes with the impeller and drive key (pin), so you can replace the impeller and secure it properly. (We recommend also inspecting the pump housing and gasket during replacement.)
- Prevent Overheating Issues: Older engines can run hot if the impeller is weak or broken. This new impeller pumps plenty of water to the powerhead, protecting your engine when running at full throttle or in shallow, warm waters.
- Maintain Performance: A well-cooled engine runs better. If you’ve noticed your vintage 40/50HP running hotter or losing power, a fresh impeller can often solve the issue by improving water flow and cooling efficiency.
- Easy Maintenance: Installing this impeller is straightforward with basic tools. It’s a cost-effective maintenance step that can save you from much more expensive engine repairs on your classic outboard.
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Engine Brand:OMC / Johnson / Evinrude
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Blades:6 blades
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Inner diameter ø:16.04
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Outer diameter ø:70
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Height:22.3
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Impeller material:Neoprene




