580740 OMC Coil | Genuine Used Part

🔧 Product Description

Genuine OMC / Johnson / Evinrude Ignition Coil and Yoke Assembly - Part Number: 0580740

A genuine OMC ignition coil and yoke assembly used on Johnson and Evinrude 3-cylinder and 4-cylinder ignition systems. This coil family is associated with 0580740 / 580740 and 0582382 / 582382 applications, including early V4 StarFlite and 100HP, 115HP and 125HP two-stroke ignition layouts.

⚙️ Key Features

• Genuine OMC / Johnson / Evinrude ignition coil
• Correct OEM reference 0580740 / 580740
• Coil and yoke assembly
• Used on 3-cylinder and 4-cylinder ignition systems
• Must be matched by coil mounting style and ignition lead layout

🚤 Compatibility

Commonly used on

• Johnson / Evinrude 3-cylinder and 4-cylinder two-stroke ignition systems
• Early V4 StarFlite ignition coil applications

Typically suits

• Johnson / Evinrude 100HP V4, including 1971 100HP applications
• Johnson / Evinrude 115HP V4 StarFlite applications
• Johnson / Evinrude 125HP V4 StarFlite applications
• 3-cylinder and 4-cylinder engines using the 0580740 / 0582382 coil family
• HP Range: 100HP / 115HP / 125HP confirmed family applications
• Engine Type: Johnson / Evinrude two-stroke ignition system
• Year Range: Early 1970s and model-diagram controlled replacement family
• Serial Note: Confirm by exact model number, coil/yoke mounting style and ignition diagram.

🔌 Function

The ignition coil transforms power-pack or ignition output into high-voltage spark for the assigned cylinder circuit.

⚠️ Common Signs of Failure

• Weak or missing spark
• Misfire under throttle
• Hard starting when cold or hot
• Cylinder drops out after warming up
• Cracked coil body or damaged yoke
• Carbon tracking at the coil tower
• Spark changes when the lead or coil is moved

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 0580740 / 580740 to 0582382 / 582382 family

OEM / Related Numbers

• 0580740
• 580740
• 0582382
• 582382
• 0502886
• 580847
• 802365
• Ignition coil and yoke assembly

Aftermarket / Verified Equivalents

• CDI Electronics 183-2382
• Sierra 18-5193
• Mallory 9-23108

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated