Balmar 120A Saddle Mount Alternator Kit, K6 Pulley

Description

The Balmar 120A Saddle Mount Alternator Kit combines a 12V high-output alternator, external MC-618 regulator, temperature sensors, and mounting hardware into a coordinated charging-system upgrade for engines using a 3.15-inch dual-foot Hitachi-style saddle mount. The kit is aimed at boat owners who want more charging capacity than a stock alternator can provide while also gaining intelligent external regulation and temperature-based charging protection.

The included 60-120-K6 alternator is rated for 120 amps at 12V, uses isolated grounding, and is configured with a K6 serpentine pulley. Its 3.15-inch saddle mount is commonly found on Yanmar, Westerbeke, Lehman, and Perkins-Sabre engines, making the kit particularly useful for repowers, cruising boats, and battery-bank upgrades built around those engine families.

Balmar’s MC-618 regulator gives the alternator a dedicated external charging controller rather than relying on a basic internal regulator. The included temperature sensors allow the charging system to monitor operating conditions and adjust charging behavior when temperatures rise, helping protect the alternator and battery system during extended high-output charging.

Mounting hardware is included so the major alternator and regulation components arrive as a matched package. This kit replaces 60-YP-MC-120-SR-KIT. For vessels needing a 120A serpentine-drive charging upgrade with a 3.15-inch saddle mount, this Balmar kit provides the alternator, regulator, sensing, and installation hardware in one system. See what else we carry in marine alternators.