New Mercury & Mariner 6-Cylinder Outboard Internal Wiring Harnesses

At OBParts, we provide a complete selection of internal wiring harnesses for Mercury and Mariner 6-cylinder outboard motors. These OEM-quality harnesses are designed to deliver reliable electrical connectivity for V6 engines ranging from 150 HP to 250 HP. Each harness is organized by horsepower, year, and engine style to ensure you find the exact fit for your outboard. Built to endure the harsh marine environment, these harnesses provide corrosion resistance, precise connections, and long-lasting durability. Whether you’re replacing an old, worn, or faulty harness or performing a complete outboard restoration, our catalog makes it easy to identify the correct part for your Mercury or Mariner 6-cylinder V6 engine.