Balmar Alternator 100 AMP 12V 1-2" Single Foot Spindle Mount J10 Pulley w/Isolated Ground

The 621 Series 100 AMP 12V Alternator is engineered for optimal performance in marine and boating applications. Designed with durability and reliability in mind, this alternator provides consistent power to keep your vessel's electrical systems running smoothly, ensuring a safe and enjoyable boating experience.

Key Features

• High Output: Delivers 100 AMP at 12 volts, ensuring ample power for all your marine electrical needs.
• Versatile Mounting: Compatible with both 1" Motorola-Style and 2" Delco-Style engine mounts, catering to a wide range of marine engines.
• Isolated Ground: Reduces electrical interference and enhances system reliability.
• Durable Construction: Built to withstand the harsh marine environment, ensuring long-lasting performance.
• Easy Installation: Single foot spindle mount simplifies the installation process, saving time and effort.

Technical Specifications

Series	621 Series
Maximum Output	100 AMP
Voltage	12V
Mount Type	Single Foot Spindle Mount
Pulley Size	1-2"
Mounting Styles	J10 AltMount Serpentine Pulley Isolated Ground

Engine Compatibility

This alternator is compatible with a diverse range of marine engines, making it a versatile choice for various boating setups:

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

Replacement Information

The 621 Series 100 AMP Alternator is a direct replacement for the part number:

• 621-100-SR-IG

Warranty and Returns

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, refer to the product brochure:

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.