Mercury To Yamaha Outboard Harness Adapter – 858740T4 (Aftermarket)

This is an aftermarket harness adapter that lets you connect a Mercury outboard to a Yamaha compatible harness.

It's new other, meaning it's aftermarket unless stated otherwise.

The manufacturer part number is 858740.

It's made by Quality Aftermarket.

If you're doing a swap or need to adapt between these two brands, this is the part you need.

Double-check compatibility before buying.

It's a simple solution for mixing and matching marine electronics.

No OEM here, just a solid aftermarket option.