Mercury - Trim Limit Switch Kit Controlled Tilt-Up Range 899625K08. Overview. When an engine tilts too far, it can bump into brackets, rigging, or the transom-especially on smaller outboards. The Mercury 899625K08 Trim Limit Switch Kit keeps that from happening. It gives you a reliable upper stop so the engine lifts only as high as it should, protecting both the motor and anything nearby. Once installed, trimming and tilting feel more controlled and predictable, making day-to-day operation a lot