![Balmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount J10 Pulley w\/Isolated Ground [621-120-J10]](https://cdn11.bigcommerce.com/s-e6ht4dde3g/images/stencil/1280x1280/products/37985/49248/97461XL__69423.1669670537.jpg?c=2 "Balmar Alternator 120 AMP 12V 1-2\" Single Foot Spindle Mount J10 Pulley w\/Isolated Ground [621-120-J10]")
Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount J10 Pulley with Isolated Ground
Alternator, 621 Series, 120A, 12V, Spindle Mount (Single Foot), 1-2in, J10 AltMount Serpentine Pulley, Isolated Ground 1" Motorola-Style Mounting.
Typical for Westerbeke, Lehman, Hino & Pathfinder Engines 2" Delco-Style Mounting; Typical for Volvo Penta (Gas & Diesel), John Deere, Perkins, Mercruiser, Pleasurecraft, Crusader, Indmar, Marine Power & other GM-based Engines.
Replaces: 621-120-SR-IG
This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.Brochure (pdf)
![Balmar Alternator 100 AMP 12V 1-2" Single Foot Spindle Mount J10 Pulley w\/Isolated Ground [621-100-J10]](https://cdn11.bigcommerce.com/s-e6ht4dde3g/images/stencil/500x659/products/37957/49213/97459XL__73632.1668792757.jpg?c=2 "Balmar Alternator 100 AMP 12V 1-2\" Single Foot Spindle Mount J10 Pulley w\/Isolated Ground [621-100-J10]")
![Balmar Alternator 120 AMP Kit 12V 1-2" Single Foot Spindle Mount J10 Pulley Regulator Temp Sensor [621-VUP-MC-120-J10]](https://cdn11.bigcommerce.com/s-e6ht4dde3g/images/stencil/500x659/products/37930/49181/79805XL__60483.1668727628.jpg?c=2 "Balmar Alternator 120 AMP Kit 12V 1-2\" Single Foot Spindle Mount J10 Pulley Regulator Temp Sensor [621-VUP-MC-120-J10]")
![Balmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley w\/Isolated Ground [621-120-DV]](https://cdn11.bigcommerce.com/s-e6ht4dde3g/images/stencil/500x659/products/37938/49190/95720XL__80179.1668727740.jpg?c=2 "Balmar Alternator 120 AMP 12V 1-2\" Single Foot Spindle Mount Dual Vee Pulley w\/Isolated Ground [621-120-DV]")