CDI Unit for Johnson Evinrude 4–60 HP Electronic Control Units (1977–1984)

Product Details

This CDI Unit is an aftermarket replacement for the electronic control unit used on selected Johnson Evinrude outboard engines rated from 4 HP through 60 HP and produced from 1977 through 1984. It is intended to replace a failed or malfunctioning ignition control unit and help restore dependable ignition operation when the engine's wiring, charging components, ignition coils, and related systems are in suitable condition.

The company application for this product is Johnson Evinrude 4–60 HP electronic control units, 1977–1984. Confirm the exact engine model, production year, original unit configuration, connector arrangement, and reference number before ordering.

• Aftermarket CDI unit for Johnson Evinrude outboard applications
• Application range: 4–60 HP electronic control units
• Model-year range: 1977–1984
• Designed as a replacement component for the original ignition control unit

Part Number Matrix

The following manufacturer and aftermarket references are associated with this CDI unit. Part-number references alone do not replace checking the complete engine application.

Engine & Model Compatibility

Use the complete engine identification and the original unit's markings to confirm compatibility. The company-listed application is:

Technical Specs

Product Type

CDI unit

Application

Johnson Evinrude electronic control units

Horsepower Range

4 HP–60 HP

Year Range

1977–1984

Primary OEM Reference

582452

Additional OEM References

581649, 581924, 581926, 581927, 582453, 583380, 583453

Aftermarket Reference

18-5758

Brand Application

Johnson / Evinrude outboard

What's in the Box

• 1 × CDI unit

This listing is for a single CDI unit. Additional ignition, charging, wiring, mounting, or engine components are not included unless specifically shown or stated in the order details.

Installation Notes

1. Turn off the engine and isolate the boat's battery and electrical power according to the engine manufacturer's service procedure.
2. Record the engine model, year, wiring positions, connector locations, and the markings on the original CDI unit before disassembly.
3. Inspect the replacement unit, connectors, terminals, and mounting points. Do not install the part if the connector layout or physical configuration does not match the original application.
4. Label each wire or connector, then disconnect the original unit without pulling on the wiring.
5. Remove the original mounting hardware and install the replacement unit in the same position and orientation.
6. Reconnect the wiring exactly as documented. Make sure every connector is fully seated and protected from moisture and contamination.
7. Inspect related wiring, grounds, ignition coils, stator components, and connectors for corrosion, looseness, damaged insulation, or other faults before testing.
8. Reinstall all covers and protective components, restore electrical power, and perform the manufacturer's recommended ignition and starting checks.
9. Test the engine in a safe, ventilated area and verify stable starting, idle, and throttle response before returning the boat to service.

Troubleshooting & FAQ

What engines is this CDI unit intended for?

The company-listed application is Johnson Evinrude electronic control units used on 4–60 HP outboards from 1977–1984. Confirm the exact engine model and original unit references before ordering.

Is this an OEM component?

No. This is an aftermarket replacement CDI unit. It is associated with the OEM references listed on this page, but the original unit, connectors, and complete engine application should still be compared before installation.

How can I check whether my original unit has failed?

Symptoms may include no spark, hard starting, intermittent misfire, or loss of ignition output. Diagnose the complete ignition system before replacement, including wiring, grounds, ignition coils, stator components, connectors, and the manufacturer's specified test values.

Does the listing include a complete power pack or other ignition parts?

No. The company record identifies this product as a single CDI unit, not a kit. The box contains one CDI unit; ignition coils, stators, wiring, mounting hardware, and other components are not included unless separately specified.

Can I install this without checking the connector layout?

No. Do not rely on horsepower and year alone. Compare the original unit, connectors, wiring positions, mounting arrangement, and applicable part-number references before installation.

What should I do if the engine still has no spark after installation?

Switch off the engine and recheck connector seating, wiring order, grounds, battery isolation, and related ignition components. A replacement CDI unit will not correct faults elsewhere in the ignition or charging system.

Safety & Important Info

• Verify the exact Johnson Evinrude model, year, horsepower, original control unit, connector configuration, and reference number before purchase.
• Do not install a part with different connectors, wiring positions, or physical configuration from the original unit.
• Disconnect electrical power before servicing the ignition system and follow the engine manufacturer's service instructions.
• This is an aftermarket replacement, not an OEM component.
• Professional installation or qualified marine-technician diagnosis is recommended when the ignition fault has not been confirmed.

About Sea Sierra

• We supply marine replacement parts for maintenance and repair applications.
• Product information is organized around documented applications and reference numbers.
• Always compare the original component and complete engine application before installation.