Description
Balmar 120A 12V Marine Alternator | Boat Supply Store
This Balmar 604-120-K6 alternator is engineered to deliver a robust 120 Amp output at 12 Volts, ensuring efficient battery charging for demanding marine diesel applications. Its specific 4-inch dual foot saddle mount (J-180-style) and K6 serpentine pulley system facilitate precise integration with common heavy-duty diesel engines. The isolated ground design significantly mitigates electrical interference, crucial for maintaining clean power systems on vessels operating in challenging offshore environments.
Key Features
- High Output: Delivers a substantial 120 Amp charging capacity for rapid battery replenishment.
- 12V System: Engineered for seamless integration into standard 12-volt marine electrical systems.
- Secure Mount: Features a 4-inch J-180-style dual foot saddle mount for exceptionally stable and reliable installation.
- Efficient Drive: Utilizes a K6 serpentine pulley for optimized power transfer and reduced belt slippage.
- Noise Reduction: Isolated ground configuration prevents ground loops and minimizes radio frequency interference.
- Heavy-Duty Design: Built to withstand the rigorous demands of continuous operation in marine environments.
- Precision Fitment: Direct replacement for Balmar 604-120-SR-IG, simplifying upgrade processes.
- Reliable Performance: Trusted for its durability and consistent performance on commercial and recreational vessels.
Specifications
| Product Specifications | |
|---|---|
| Amp Output | 120 Amp |
| Voltage | 12 Volt |
| Mounting Style | 4-inch Dual Foot Saddle Mount (J-180-Style) |
| Pulley Type | K6 Serpentine Pulley |
| Ground Type | Isolated Ground |
Who This Is For
Marine vessel owners and technicians requiring a high-output, reliable 12V alternator for charging batteries on boats with Caterpillar, Cummins, Detroit Diesel, or John Deere engines, particularly those needing a 4-inch dual foot saddle mount and K6 serpentine pulley system. This unit is ideal for upgrading older systems or replacing worn components on vessels where consistent and ample power generation is critical.
How It Compares
| Feature | Balmar 120A 12V Marine Alternator | Prestolite Electric 120 |
|---|---|---|
| Amperage Output | 120A | 120A, 105A |
| Voltage | 12V | 12V, 12V |
| Mounting Style | 4" Dual Foot Saddle Mount | Saddle Mount, Saddle Mount |
| Pulley Type | K6 Serpentine | V-Belt, V-Belt |
| Ground Type | Isolated Ground | Grounded, Grounded |
Common Concerns Answered
Why is the Balmar 604-120-K6 more expensive than some alternatives?
The higher initial investment reflects Balmar's commitment to superior engineering, robust construction materials, and advanced technologies like the isolated ground system, ensuring greater longevity and reliability in harsh marine environments. This translates to a lower total cost of ownership through reduced maintenance and fewer failures.
I have an older diesel engine; will this alternator fit and function correctly?
The Balmar 604-120-K6 is designed for heavy-duty marine diesel applications and is a direct replacement for specific Balmar models. While its 4-inch dual foot saddle mount and K6 serpentine pulley are precise specifications, verifying your engine's existing mount type and pulley system against these dimensions is crucial for ensuring perfect compatibility.
What are the benefits of an isolated ground system in a marine alternator?
An isolated ground system prevents unwanted electrical currents from flowing through the engine block and hull, significantly reducing the risk of galvanic corrosion and mitigating interference with sensitive onboard electronics, such as radios and navigation equipment. This leads to a cleaner, more reliable electrical system.
Frequently Asked Questions
What is the amperage output of the Balmar 604-120-K6 alternator?
The Balmar 604-120-K6 alternator provides a high output of 120 Amps.
What voltage is the Balmar 604-120-K6 alternator designed for?
This alternator is designed for use in 12-volt marine electrical systems.
What type of pulley system does the Balmar 604-120-K6 alternator use?
The Balmar 604-120-K6 utilizes a K6 serpentine pulley system for efficient belt drive.
What is the mounting style of the Balmar 604-120-K6 alternator?
It features a 4-inch dual foot saddle mount, specifically the J-180-style, for secure engine attachment.
What does 'isolated ground' mean for this alternator?
An isolated ground means the alternator's negative terminal is not directly connected to the engine block or vessel's ground system, helping to prevent electrical interference and corrosion issues.
