Mercury - Active Trim Kit (Without Trim Pad) 75-115 HP FourStroke Single Engine 8M0129442. Overview. The Mercury Active Trim Kit (8M0129442) automatically adjusts your engine's trim angle through your VesselView display - no separate trim pad required. Designed for single-engine non-tiller 75-115 HP Mercury FourStroke outboards, it continuously adjusts trim based on speed and RPM for better performance, fuel efficiency, and smoother handling.. All setup and adjustments are managed through your V