Balmar 621 Series 120A Kit w/MC-618 Regulator, T-Sensor, K6 Pulley, Single Foot Mounting Hardware

The 621 Series 120A Kit is the perfect solution for marine enthusiasts seeking reliable power management for their vessels. Designed for compatibility with a wide range of marine engines, this comprehensive kit ensures optimal performance and easy installation.

What’s Included

• 621-120-K6 Alternator
• MC-618 Regulator
• Temperature Sensors
• Mounting Hardware

Product Details

Component	Specifications
Alternator Model	621-120-K6
Output	120A
Voltage	12V
Mount Type	Spindle Mount (Single Foot)
Pulley Size	1-2 in
Pulley Type	K6 Serpentine Pulley
Ground Type	Isolated Ground

Mounting Options

The 621 Series 120A Kit offers versatile mounting options to ensure compatibility with various marine engines:

• 1" Motorola-Style Mounting: Typically used with Westerbeke, Lehman, Hino, and Pathfinder engines.
• 2" Delco-Style Mounting: Commonly found on Volvo Penta (Gas & Diesel), John Deere, Perkins, Mercruiser, Pleasurecraft, Crusader, Indmar, Marine Power, and other GM-based engines.

Installation and Usage

Installing the 621 Series 120A Kit is straightforward with the included mounting hardware. Whether you’re upgrading your current setup or installing a new alternator, this kit provides all necessary components for a seamless installation process. The MC-618 Regulator ensures stable voltage control, while the temperature sensors monitor engine performance to prevent overheating.

Important Information

Please note:

This product may not be returned to the original point of purchase. For any issues or concerns, please contact the manufacturer directly.

Additional Resources

For detailed installation instructions and product information, please refer to the Quick Guide (PDF).

Orders of physical products placed by 3 PM EST M-F typically ships the same day, if all requested items are in stock. Weekend orders will typically ship on Monday.

Shipping takes 2-7 days.

We currently ship to the Contiguous 48 States.

Life of Sailing merch is custom made for the customer after an order is placed. Total turnaround is typically 7-14 days from order to doorstep.