Alternator 100 AMP Kit 12V 1-2in Single Foot Spindle Mount K6 Pulley Regulator & Temp Sensor. Kit Includes: 621-100-K6 Alternator, MC-614 Regulator, Temperature Sensors, Mounting Hardware 621-100-K6 Alternator: 100A, 12V, Spindle Mount Single Foot, 1-2in, K6 Serpentine Pulley, Isolated Ground 1in Motorola-Style Mounting; Typical for Westerbeke, Lehman, Hino & Pathfinder Engines 2in Delco-Style Mounting; Typical for Volvo Penta Gas & Diesel, John Deere, Perkins, Mercruiser, Pleasurecraft, Crusader, Indmar, Marine Power & other GM-based Engines Replaces: 621-VUP-MC-100-SR-KIT