Johnson & Evinrude 4-Cylinder Outboard Internal (Engine-Side) Wiring Harnesses

Keep your Johnson & Evinrude 4-cylinder outboard engine running at peak performance with a high-quality internal wiring harness replacement. Designed to match original equipment specifications, this harness ensures reliable power delivery, proper electrical connections, and long-lasting durability in marine conditions. Over time, outboard wiring can become brittle, corroded, or damaged, leading to misfires, electrical shorts, or complete engine failure. Replacing the harness restores safe, consistent connectivity between critical engine components, helping you avoid downtime on the water. Whether you’re repairing, upgrading, or restoring your 4-cylinder Johnson or Evinrude motor, this harness delivers the quality, reliability, and performance you need on the water.