621 Series 120A Kit with MC-614 Regulator, T-Sensor, K6 Pulley, Single Foot & Mounting HardwareKit Includes:. 621-120-K6 Alternator. MC-614 Regulator. Temperature Sensors. Mounting Hardware. 621-120-K6 Alternator: 120A, 12V, Spindle Mount (Single Foot), 1-2in, K6 Serpentine Pulley, Isolated Ground1" Motorola-Style Mounting; Typical for Westerbeke, Lehman, Hino & Pathfinder Engines. 2" Delco-Style Mounting; Typical for Volvo Penta (Gas & Diesel), John Deere, Perkins, Mercruiser, Pleasurecraft, Crusader, Indmar, Marine Power & other GM-based Engines