Balmar 120A Saddle Mount Alternator Kit, J10 Pulley

Description

The Balmar 120A Saddle Mount Alternator Kit combines a 12V high-output alternator with external regulation, temperature sensing, and installation hardware for engines using a 3.15-inch dual-foot Hitachi-style saddle mount. It is intended for cruising boats and other marine systems that need stronger battery-bank charging than a standard alternator can provide.

The included 60-120-J10 alternator is rated for 120 amps, uses isolated grounding, and is equipped with Balmar’s J10 AltMount serpentine pulley. The 3.15-inch saddle configuration is typical of many Yanmar, Westerbeke, Lehman, and Perkins-Sabre engines, allowing the kit to serve as a coordinated charging upgrade for several common diesel installations.

An MC-618 external regulator is included to control charging behavior more precisely than a basic internal regulator. Temperature sensors are also supplied, allowing the charging system to react to temperature conditions during extended high-output operation and helping protect both the alternator and batteries.

Mounting hardware is included with the alternator, regulator, and sensors so the main charging-system components arrive as a matched package. The kit replaces 60-YP-MC-120-SR-KIT. For owners moving to a J10 serpentine drive while upgrading to 120A charging capacity, this Balmar kit provides a comprehensive foundation for the installation. More options in our marine alternators.