Kit 621 Series 100A Single FT Alt MC Reg T Sensor
Kit Includes:
- 621-100-SV Alternator, MC-618 Regulator, Temperature Sensors, Mounting Hardware
621-100-SV Alternator: 100A, 12V, Spindle Mount (Single Foot), 1-2in, Single 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-VUP-MC-100-SR-KIT
This product may not be returned to the original point of purchase.Please contact the manufacturer directly with any issues or concerns.
Specifications:
- Amperage: 100A
- Voltage: 12v
- Box Dimensions: 10″H x 11″W x 14″L WT: 16.2 lbs
- UPC: 676205000543
Brochure (pdf)
SKU:BAL-621-VUP-MC-100-SV

![ARCO Zeus A275L 1″-2″ Single Foot Alternator w/Isolated Ground, RegulatorZeus High-Energy Alternator Regulator [4030-AZ1000]](https://www.marineveststore.com/wp-content/uploads/2026/10/arco-zeus-a275l-1-2-single-foot-alternator-w-isolated-ground-regulatorzeus-high-.webp)
![Balmar Alternator 120 AMP Kit 12V 1-2" Single Foot Spindle Mount J10 Pulley RegulatorTemp Sensor [621-VUP-MC-120-J10]](https://www.marineveststore.com/wp-content/uploads/2026/10/balmar-alternator-120-amp-kit-12v-1-2-single-foot-spindle-mount-j10-pulley-regul.webp)
![Balmar Alternator 1-2" Single Foot J10 Serpentine Pulley RegulatorTemp Sensor - 170A Kit - 12V [XT-SF-170-J10-KIT]](https://www.marineveststore.com/wp-content/uploads/2026/10/balmar-alternator-1-2-single-foot-j10-serpentine-pulley-regulatortemp-sensor-170.webp)


![ARCO Zeus A275L Vortec Alternator w/Terminal BlockZeus High-Energy Alternator Regulator [4033-AZ1000]](https://www.marineveststore.com/wp-content/uploads/2026/10/arco-zeus-a275l-vortec-alternator-w-terminal-blockzeus-high-energy-alternator-re.webp)
![Balmar Dual MC612 Multi-Stage 12V Regulator w/Harness [MC-612-DUAL-H]](https://www.marineveststore.com/wp-content/uploads/2026/10/balmar-dual-mc612-multi-stage-12v-regulator-w-harness-mc-612-dual-h.webp)
