Sierra International 18-2373 Trim Cylinder End Cap The Sierra 18-2373 Trim Cylinder End Cap is interchangeable with the following: Mercruiser 806191T, 8M0110717, 14698T10, 14698, 14698T. Each Sierra product meets or exceeds the original equipment part it replaces. Sierra Trim Cylinder End Cap Cap Diameter: 1.890 Sierra part number: 18-2373 Interchangeable with the following: Mercruiser 806191T, 8M0110717, 14698T10, 14698, 14698T