Mercury - Trim Limit Switch Kit Digital Tilt-Up Control 8M0059532. Overview. When a motor climbs too high on tilt, it can run into brackets or rigging that were never meant to carry that load. The Mercury 8M0059532 Trim Limit Switch Kit prevents that. Designed as a digital limit device for the 150 horsepower Four Stroke, it sets a clear upper stop so the engine tilts only as far as it should. You get a cleaner, more predictable lift, and the hardware around the engine stays protected every time