Mercury – Trim Cylinder O-Ring Kit | Hydraulic Trim System | Rubber Seals | 87400A2Mercury Trim Cylinder O Ring Kit Hydraulic Trim System Rubber Seals 87400A2 Overview If youve spent enough hours on the water, you can feel when your trim system stops behaving the way it should. The stern doesnt lift as cleanly, the bow angle feels off, or you start seeing a bit of hydraulic film where it doesnt belong. Thats usually your trim cylinder telling you it needs some attention. The Quicksilver 87400A2 O Ring Kit is one of those small,