Mercury – Active Trim Mechanical Kit | MerCruiser Dual Engine | 8M0111554Mercury Active Trim Mechanical Kit MerCruiser Dual Engine 8M0111554 Overview The Mercury Active Trim Mechanical MerCruiser Dual Engine Kit (8M0111554) is designed for dual engine mechanical control MerCruiser sterndrives specifically the 4. 5L and 6. 2L 300 & 350 HP models. This system automatically adjusts your engine trim for smoother acceleration, consistent handling, and better overall fuel economy. With Active Trim, you can leave the trim buttons