# 0581366 511778 OMC Rectifier | Genuine Used Part

🔧 Product Description

  

Genuine OMC / Johnson / Evinrude Rectifier Lead Assembly - Part Number: 0581366

  

A genuine OMC rectifier / lead assembly used on Johnson and Evinrude small to mid-range two-stroke electric-start outboards. This rectifier family is commonly associated with the 0581778 / 581778 current replacement reference and is used on 4HP to 60HP two-stroke charging systems.

  

⚙️ Key Features

  

• Genuine OMC / Johnson / Evinrude rectifier assembly

• Correct OEM reference 0581366

• Supersedes into the 0581778 / 581778 rectifier-lead family

• Used on small and mid-range two-stroke charging systems

• Must be matched by charging system type and wiring connector layout

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 0581366 / 581366 to 0581778 / 581778

  

OEM / Related Numbers:

  

• 0581366

• 581366

• 0581778

• 581778

• 0582304

• 0173692

• Rectifier lead assembly

• Rectifier / lead housing assembly

  

Aftermarket / Verified Equivalents:

  

• Recmar REC581778

• ARCO AR104

• Outboard Spares OSR581

• CDI two-cylinder rectifier replacement listed against 581778

  

🚤 Compatibility

  

Commonly used on:

  

• Johnson / Evinrude electric-start two-stroke outboards

• 4HP to 60HP two-stroke charging systems

• 9.9HP to 60HP electric-start models using the 0581778 / 581778 rectifier family

  

Typically suits:

  

• Johnson / Evinrude 4HP to 60HP two-stroke outboards, 1974-2005

• Johnson / Evinrude 9.9HP to 60HP electric-start outboards

• Johnson / Evinrude 55HP two-cylinder 3.187 bore looper applications

• Johnson / Evinrude 15HP electric-start applications including 1977 model listings

• HP Range: 4HP / 9.9HP / 15HP / 55HP / 60HP

• Engine Type: Johnson / Evinrude two-stroke outboard with rectifier charging system

• Year Range: 1974-2005

• Serial Note: OMC applications are model-year and model-number controlled; confirm by exact parts diagram and rectifier lead layout.

  

🔌 Function

  

The rectifier converts stator AC output into DC charging voltage so the battery and electrical system receive usable charging current.

  

Common signs of failure:

  

• Battery not charging while engine is running

• Overcharging or unstable battery voltage

• Tachometer signal missing or erratic on systems using stator/rectifier tach feed

• Burnt or melted rectifier wiring

• Blown charging-system fuse

• Corroded terminals or cracked housing

• Electrical output changes after wiring is moved

  

📦 Condition

  

• Genuine used part

• Removed from running engine where applicable

• In good working condition unless otherwise stated

## Details

- **Price:** 15.0 AUD
- **Vendor:** Sawley's Auto and Marine
- **Tags:** Sawley’s AAM Used Parts – Electronic Components | ECU CDI & Electrical Parts

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 15.00 AUD | In stock |

## Images

- 0581366 511778 OMC Rectifier | Genuine Used Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/0581366-511778-omc-rectifier-genuine-used-part)
> Updated: 2026-06-29