Kit 621 Series 100A Single FT Alt MC Reg T SensorKit Includes: 621-100-SV Alternator, MC-618 Regulator, Temperature Sensors, Mounting Hardware; 621-100-SV Alternator: 100A, 12V, Spindle Mount (Single Foot), 1-2in, Single Deep Vee Pulley, Isolated Ground1" Motorola-Style Mounting; Typical for Westerbeke, Lehman, Hino & Pathfinder Engines2" Delco-Style Mounting; Typical for Volvo Penta (Gas & Diesel), John Deere, Perkins, Mercruiser, Pleasurecraft, Crusader, Indmar, Marine Power & other GM-based EnginesReplaces: 621-VUP-MC-100-SR-KIT; This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns. - cis2:mm5mnJlm -Brochure (pdf)