![Balmar Alternator 120 AMP 12V 1-2" Single Foot Spindle Mount Dual Vee Pulley w/Isolated Ground [621-120-DV]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/balmar-alternator-120-amp-12v-1-2-single-foot-spindle-mount-dual-vee-pulley-w-is.webp)
Description
Alternator 120 AMP 12V 1-2″ Single Foot Spindle Mount Dual Vee Pulley with Isolated Ground
Alternator, 621 Series, 120A, 12V, Spindle Mount (Single Foot), 1-2in, Dual Deep Vee 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.
Specifications:
- Amperage: 120A
- Voltage: 12v
- Box Dimensions: 9″H x 10″W x 10″L WT: 13.6 lbs
- UPC: 676205131087
Brochure (pdf)
![Balmar Pulley Kit Yanmar f/3YM30 [48-YSP-3YM-B]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/balmar-pulley-kit-yanmar-f-3ym30-48-ysp-3ym-b.webp)
![Balmar Alternator 250 AMP Kit 12V 4" Dual Foot Saddle Dual Vee Pulley RegulatorTemp Sensor [XT-DF4-250-DV-KIT ]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/balmar-alternator-250-amp-kit-12v-4-dual-foot-saddle-dual-vee-pulley-regulatorte.webp)
![Balmar Alternator 1-2″ Single Foot Dual V Pulley RegulatorTemp Sensor – 170A Kit – 12V [XT-SF-170-DV-KIT]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/balmar-alternator-1-2-single-foot-dual-v-pulley-regulatortemp-sensor-170a-kit-12.webp)
![Balmar Alternator 170 AMP 12V 3.15" Dual Foot Saddle K6 Pulley [XT-CR-170-K6]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/balmar-alternator-170-amp-12v-3-15-dual-foot-saddle-k6-pulley-xt-cr-170-k6.webp)
