Sierra International 18-5865 Stator The Sierra 18-5865 Stator is interchangeable with the following: Mallory 9-25506, Mercury 398-5704A7, 398-5704A2, 398-5704A5. Each Sierra product meets or exceeds the original equipment part it replaces. Sierra Stator Meets or exceeds the original equipment quality Sierra part number: 18-5865 Interchangeable with the following: Mallory 9-25506, Mercury 398-5704A7, 398-5704A2, 398-5704A5