Sierra Rectifier – Johnson / Evinrude Outboards | 47-5709
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Sierra Rectifier – Johnson / Evinrude Outboards | 47-5709
Restore proper battery charging to your Johnson or Evinrude outboard with this Sierra replacement rectifier. The rectifier converts AC output from the engine’s stator into DC current to keep the battery charged while the engine runs — when it fails, the battery drains progressively and the engine may eventually refuse to start. Built to OEM specifications, this unit is a direct-fit replacement for the applicable Johnson and Evinrude outboard applications.
Compatible Applications
- Johnson and Evinrude (OMC) outboard engines with AC charging systems
- Replaces OMC: 0582058
- 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
This is the sibling to the Sierra 47-5708 Rectifier — both fit Johnson and Evinrude outboards, but they cover different engine applications. Use the OEM part number (OMC 0582058 for this unit, OMC 0581778 for the 47-5708) to confirm which one matches your engine before ordering. A failing rectifier is one of the most commonly misdiagnosed electrical problems on older OMC outboards — if your battery keeps draining despite being in good condition, test the rectifier before replacing anything else. 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.