Mercury - Race Vessel AGI Harness Performance Gauge Link 892486K05. OverviewThis Race Vessel AGI harness ties your trim tabs, engine trim, and both fuel-level circuits into the PCM using the 3-pin gauge link. It's built for race-engine setups already running a Race Engine AGI, giving those gauges a clean, steady signal. Out on the water, it helps keep the readings from bouncing around when the boat hits chop or settles into a hard run. Simple hookup, clean routing, and ready for any PCM family..