Balmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount J10 Pulley w/Isolated Ground

Enhance the reliability and performance of your marine engine with our high-quality Alternator 120 AMP 12V. Designed specifically for marine and boating applications, this alternator ensures consistent power supply to keep your onboard systems running smoothly.

Key Specifications

Feature	Details
Series	621 Series
Amperage	120 AMP
Voltage	12V
Mount Type	Single Foot Spindle Mount
Pulley Size	1-2 inches
Pulley Type	J10 AltMount Serpentine Pulley
Grounding	Isolated Ground
Mounting Style	1" Motorola-Style

Enhanced Features

• Durable Construction: Built to withstand the harsh marine environment, ensuring longevity and reliable performance.
• Efficient Power Output: Delivers a stable 120 AMP at 12V, perfect for powering various marine electrical systems.
• Advanced Mounting Options: Equipped with a Single Foot Spindle Mount and a Motorola-Style Mounting for easy installation.
• Isolated Ground: Minimizes electrical interference, enhancing the overall safety and efficiency of your engine’s electrical system.
• Versatile Pulley System: Features a J10 AltMount Serpentine Pulley compatible with 1-2 inch setups, ensuring a proper fit for your engine.

Compatibility

This alternator is compatible with a wide range of marine and GM-based engines, including:

• Westerbeke
• Lehman
• Hino
• Pathfinder
• Volvo Penta (Gas & Diesel)
• John Deere
• Perkins
• Mercruiser
• Pleasurecraft
• Crusader
• Indmar
• Marine Power

Replacement Information

This alternator serves as a direct replacement for the 621-120-SR-IG model, ensuring a seamless upgrade without the need for modifications.

Support and Warranty

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

Additional Resources

For more detailed information, please refer to our 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.