Balmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley Regulator Temp Sensor

The 120 AMP 12V Alternator is engineered specifically for marine and boating applications, delivering reliable power generation and optimal performance to keep your vessel's electrical systems running smoothly. With a robust single foot spindle mount and dual deep Vee pulley, this alternator is built to withstand the harsh conditions of marine environments, ensuring longevity and efficiency on every voyage.

Product Features

• High Output: Delivers 120A at 12V to support all your marine electrical needs.
• Spindle Mount: Single foot spindle mount for secure and easy installation.
• Dual Deep Vee Pulley: Ensures reliable belt grip and efficient power transfer.
• Isolated Ground: Reduces electrical noise and interference for stable performance.

What’s Included

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

Technical Specifications

Specification	Details
Current	120 AMP
Voltage	12V
Mount Type	Single Foot Spindle Mount
Pulley Size	1-2 inch Dual Deep Vee Pulley
Grounding	Isolated Ground

Mounting Compatibility

This alternator features two mounting styles to accommodate a wide range of marine and boating engines:

Mounting Type	Compatible Engines
1" Motorola-Style	Westerbeke, Lehman, Hino, Pathfinder Engines
2" Delco-Style	Volvo Penta (Gas & Diesel), John Deere, Perkins, Mercruiser, Pleasurecraft, Crusader, Indmar, Marine Power, and other GM-based Engines

Replacement Information

This alternator replaces the 621-VUP-MC-120-SR-KIT.

Important Information

Please note: This product may not be returned to the original point of purchase. If you encounter any issues or have concerns, please contact the manufacturer directly.

Additional Resources

Download the Brochure (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.