Balmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley w/Isolated Ground

Ensure your marine engine operates at peak performance with our high-quality 120 AMP 12V Alternator. Designed for durability and efficiency, this alternator features a single foot spindle mount and dual deep vee pulleys, providing reliable power and long-lasting performance for a wide range of marine applications.

Key Features

• High Output: 120 Amp, 12 Volt for a reliable power supply
• Spindle Mount: Single Foot Spindle Mount for easy installation
• Pulley System: Dual Deep Vee Pulley enhances belt grip and longevity
• Isolated Ground: Reduces electrical noise and interference
• Mounting Options:
  • 1" Motorola-Style Mounting – Compatible with Westerbeke, Lehman, Hino & Pathfinder Engines
  • 2" Delco-Style Mounting – Compatible with Volvo Penta (Gas & Diesel), John Deere, Perkins, Mercruiser, Pleasurecraft, Crusader, Indmar, Marine Power & other GM-based Engines

Compatibility

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

Specifications

• Series: 621 Series
• Output: 120 Amp
• Voltage: 12V
• Pulley Size: 1-2 inches
• Replacement Part Number: 621-120-SR-IG

Replacement Information

This alternator is a direct replacement for part number 621-120-SR-IG, ensuring seamless integration with your existing marine engine setup.

Warranty and Returns

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

Download 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.