Mercury - Quicksilver Carburetor Gasket Kit Fuel System Rebuild Kit V6 2-Stroke Outboards 6452. Overview. A good seal is the difference between a smooth-running outboard and one that stumbles. The Mercury Marine 6452 Quicksilver Carburetor Gasket Kit gives your Mercury or Mariner 135-200HP V6 2-stroke outboard the fresh seals it needs for reliable performance. Old gaskets dry out, shrink, or crack over time, letting air and fuel mix unevenly. This OEM kit includes everything - gaskets, seals, an