84‑86396A8 Harness Kit – Mercury / MerCruiser

The 84-86396A8 Harness Kit gives your Mercury/Mariner engine the correct wiring it needs for accurate tachometer and instrument readings. This OEM-style harness connects easily to your boat’s electric system and replaces older damaged or corroded wiring. It fits models listed under part numbers 84-86396A1, 84-86396A4 and 84-86396A8.

You’ll appreciate how the wires route cleanly and the connectors feature marine-grade materials for durability. When you install this kit, you remove the hassle of loose or faulty gauge performance. Make sure to follow the included wiring diagram and fit the correct ground for reliable operation.

This harness suits anyone restoring older Mercury and MerCruiser outboard controls or upgrading a worn dash harness. It provides a solid, tested foundation for your instruments. Shop at Arizona Outboard Dismantlers to keep your outboard on the water with trustworthy wiring and top-quality parts.

84-86396A8 Harness Kit