Mercury - Analog Gauge Harness DTS Engine Link 84-8M0095827. OverviewThis 25-foot analog gauge harness plugs right into the engine's 4-pin lead and gives you clean signals for trim, coolant temp, oil pressure, and tach. The extra length makes it a solid choice for bigger boats, longer rigging paths, or consoles mounted well forward. On the water, it helps the gauges stay steady instead of flickering or dropping out the way old wiring sometimes does. It's a simple, long-reach harness made for DTS