Sierra Rectifier – Johnson / Evinrude Outboards | 47-5708
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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 engine’s 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 Sierra’s 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 won’t hold a charge, or an engine that runs fine but drains the battery over time — are often blamed on the battery itself. If you’ve replaced the battery and still have charging issues, test the rectifier before going further. It’s a low-cost fix that’s easy to overlook. If the rectifier tests good and you’re 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.
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.