Mercury - Power Trim Gauge Trim Position Monitoring Black Face Chrome Bezel 79-8M6020006. OverviewThis power trim gauge gives you a clear, steady idea of where the engine is sitting as you bump the trim up or down. The needle doesn't jump around-it moves in a slow, clean sweep that's easy to catch at a glance. Out on the water, it feels like second nature: trim a bit, glance down, and you're right back to the wheel. It's a simple, everyday gauge that just makes running the boat feel smoother.. K