Sierra Rectifier Johnson / Evinrude Outboards | 47-5708

Sierra Rectifier Johnson / Evinrude Outboards | 47-5708

Keep your battery charging properly with this Sierra replacement rectifier for Johnson and Evinrude outboards. The rectifier converts the AC output from the engines stator into DC current to charge the battery while the engine runs when it fails, the battery drains progressively and the engine may eventually refuse to start. This Sierra unit is built to OEM specifications for a direct-fit replacement on a wide range of Johnson and Evinrude outboards.

Compatible Applications

• Johnson and Evinrude (OMC) outboard engines with AC charging systems
• Replaces OMC: 0581778
• Refer to Sierras current application guide to confirm fitment for your specific engine model and year

Key Features

• Converts stator AC output to DC for battery charging
• Built to OEM specifications for reliable charging performance
• Direct-fit replacement design
• Compact and lightweight for easy installation

Parts Desk Insights

A failing rectifier is one of the most commonly misdiagnosed electrical problems on older Johnson and Evinrude outboards. The symptoms a battery that wont hold a charge, or an engine that runs fine but drains the battery over time are often blamed on the battery itself. If youve replaced the battery and still have charging issues, test the rectifier before going further. Its a low-cost fix thats easy to overlook. If the rectifier tests good and youre still not getting a charge, the stator is the next component to investigate. For other Johnson/Evinrude electrical components, see the Sierra Starter Solenoid for Johnson / Evinrude Outboards or the Sierra Hi-Performance Starter for Johnson / Evinrude Outboards.