Sierra 18-5863 Stator The Sierra 18-5863 Stator is interchangeable with the following: CDI 174-6617K1, Mercury 86617A17. Each Sierra product meets or exceeds the original equipment part it replaces. Sierra Stator Meets or exceeds the original equipment quality Sierra part number: 18-5863 Interchangeable with the following: CDI 174-6617K1, Mercury 86617A17