Description
Balmar 120A 12V Alternator Kit | Boat Supply Store
This kit delivers a robust electrical system upgrade designed to meet the demands of auxiliary power generation on a wide range of marine vessels. It provides a continuous 120 AMP output at 12V, managed by an intelligent MC-618 regulator that incorporates temperature sensing for extended component life and optimal battery conditioning. The single foot spindle mount with a 1-2" shaft and dual vee pulley ensures reliable power transfer and broad compatibility with common marine diesel and gasoline engines, making it ideal for extended cruising or liveaboard applications.
Key Features
- Delivers a substantial 120 AMP output for demanding electrical loads.
- Operates efficiently at 12V, standard for most marine DC systems.
- Features a secure single foot spindle mount for stable installation.
- Accommodates a 1-2" shaft diameter, common on many marine engines.
- Includes a dual deep vee pulley for enhanced belt grip and power transmission.
- Comes with the advanced MC-618 regulator for intelligent charge control.
- Integrated temperature sensors protect the system from overheating.
- Offers isolated ground configuration for system safety and reduced interference.
Specifications
| Product Specifications | |
|---|---|
| AMP Output | 120 AMP |
| Voltage | 12V |
| Mounting Type | Single Foot Spindle Mount |
| Shaft Diameter | 1-2" |
| Pulley Type | Dual Vee Pulley |
| Ground Type | Isolated Ground |
| Included Regulator | MC-618 |
| Included Sensors | Temperature Sensors |
Who This Is For
Boaters requiring a high-capacity 12V charging system for auxiliary power and battery bank maintenance. This unit is particularly suitable for owners of Westerbeke, John Deere, Volvo Penta diesel, and other commonly found marine engines needing a reliable, integrated alternator solution.
How It Compares
| Feature | Balmar 120A 12V Alternator Kit | Prestolite Electric 8MR2334C |
|---|---|---|
| Amperage Output | 120A | 120A |
| Voltage | 12V | 12V |
| Integrated Regulator | MC-618 | No |
| Temperature Sensor Included | Yes | No |
| Pulley Type | Dual Vee | Single V-belt |
| Mounting Style | Single Foot Spindle Mount (1-2" shaft) | Spindle Mount |
Common Concerns Answered
What is the return policy for this Balmar alternator?
Please be advised that this product may not be returnable to the original point of purchase. For any issues, direct contact with the manufacturer is typically required to initiate the warranty or return process.
Is installation of this alternator difficult?
Installation complexity is rated at 4 out of 5. It requires a solid understanding of marine electrical systems, including correct wiring, precise belt alignment, and potential modifications to existing engine mounts. Professional installation is strongly recommended for individuals lacking extensive experience in marine electrical work.
Why is this unit priced higher than other 120A alternators?
The elevated price point is directly attributable to the inclusion of the advanced MC-618 regulator and integrated temperature sensors, offering a comprehensive and intelligent charging solution out-of-the-box. This integrated system provides superior battery management and longevity compared to basic alternator-only units.
Frequently Asked Questions
What is the maximum amperage output of the Balmar 621-VUP-MC-120-DV alternator?
The Balmar 621-VUP-MC-120-DV alternator provides a maximum output of 120 AMP.
What type of mounting does the Balmar 621-VUP-MC-120-DV alternator utilize?
This alternator features a single foot spindle mount with a 1-2 inch shaft diameter, offering compatibility with both 1" Motorola-style and 2" Delco-style mounting configurations.
Is a regulator included with the Balmar 621-VUP-MC-120-DV alternator?
Yes, the Balmar 621-VUP-MC-120-DV alternator kit includes the intelligent MC-618 regulator.
Which common marine engines are compatible with the 1" Motorola-style mounting on this alternator?
The 1" Motorola-style mounting is typically found on engines from brands such as Westerbeke, Lehman, Hino, Perkins, and many GM-based marine power plants.
Which common marine engines are compatible with the 2" Delco-style mounting on this alternator?
The 2" Delco-style mounting is frequently encountered on engines from brands like Volvo Penta (Gas & Diesel), John Deere, Mercruiser, Pleasurecraft, Crusader, Indmar, and Marine Power.
