New Mercury and Mariner 3-Cylinder Internal Outboard Wiring Harnesses

This OBParts product page features internal wiring harnesses for 3-cylinder Mercury & Mariner outboard engines. Compatible with multiple engine years and designs, these harnesses deliver OEM-level reliability and seamless integration for maintenance or rebuild projects. Explore a range of dependable wiring components designed to uphold performance, safety, and precision in marine applications. Whether you're upgrading, replacing, or repairing, our 3-cylinder wiring harnesses combine quality manufacturing, compatibility, and ease of installation to get you back on the water with confidence.