Balmar Sterndrive 621 Series 120A Kit w/MC-618 Regulator, T-Sensor, K6 Pulley, Single Foot & Mounting Hardware – Marine Boat Replacement Part is organized for ignition & electrical engine parts shoppers who need a clear, professional marine parts buying experience.

621 Series 120A Kit with MC-618 Regulator, T-Sensor, K6 Pulley, Single Foot & Mounting Hardware Kit Includes: 621-120-K6 Alternator MC-618 Regulator Temperature Sensors Mounting Hardware 621-120-K6 Alternator: 120A, 12V, Spindle Mount (Single Foot), 1-2in, K6 Serpentine Pulley, Isolated Ground 1" 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 This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.

Fitment & Product Details

• Brand / Manufacturer: Balmar, Volvo Penta, MerCruiser
• Application: Sterndrive Parts
• Voltage: 12V

• Search-optimized by brand, system, part type, and fitment cues.
• Verify compatibility with your original part number, engine model, and application before ordering.
• Built for boat owners, e-commerce shoppers, and professional marine service teams.