Balmar Alternator 100 Amp 12V 3.15" Dual foot Saddle Single K6 Pulley with Isolated Grounding - 60-120-K6
Manufacturer Part #: 60-120-K6
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Balmar Alternator 100 Amp 12V Dual Foot Saddle Mount with K6 Pulley & Isolated Ground – 60-120-K6
The Balmar 60 Series Alternator – 100 Amp, 12 Volt (60-120-K6) is a compact, high-output marine alternator engineered for reliable charging performance in demanding onboard electrical systems. Featuring a 3.15” dual-foot saddle mount, single K6 serpentine pulley, and isolated grounding, this alternator is ideal for vessels requiring dependable power with enhanced electrical safety and corrosion protection.
Designed for continuous-duty marine operation, the Balmar 60 Series delivers consistent charging at cruising RPMs, making it well suited for powering house battery banks, navigation electronics, refrigeration, lighting, and auxiliary systems. The 100-amp output at 12 volts provides efficient charging without excessive engine load, making it a popular choice for sailboats, powerboats, and light commercial applications.
The K6 serpentine pulley offers superior belt grip, reduced slippage, and quieter operation compared to traditional V-belt systems. Isolated grounding improves compatibility with aluminum hulls and multi-battery installations while helping reduce the risk of galvanic corrosion. The alternator is designed for use with external smart voltage regulators, allowing advanced multi-stage charging profiles to maximize battery life across AGM, gel, and lithium battery systems (with proper regulation).
Built with marine-grade, corrosion-resistant materials, Balmar alternators are trusted worldwide for their durability, thermal efficiency, and long-term reliability in harsh saltwater environments.
Featuring a pre-installed K6 Serpentine Pulley, this alternator is designed for boats that have been converted to, or originally equipped with, serpentine belt systems. This eliminates belt slippage and ensures maximum energy transfer to your battery banks.
Key Performance Features
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120 Amp Charging Power: Provides rapid replenishment for House and Start battery banks, even at low engine speeds.
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Dual Foot (Saddle) Mount: A precision 3.15-inch ID mount designed for a direct "bolt-on" fit for most Hitachi-style engine brackets.
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K6 Serpentine Pulley: The 6-groove design offers superior surface area contact, reducing heat and belt dust compared to traditional V-belts.
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Isolated Ground: Critical for hull protection, this feature provides a dedicated return path to the battery to prevent galvanic corrosion.
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Smart Ready® Technology: Features an internal regulator for immediate use or as a failsafe backup when paired with an external Balmar regulator.
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High-Flow Cooling: Equipped with dual internal fans and a high-airflow frame to maintain peak performance in hot engine rooms.
Technical Specifications
| Feature | Details |
| Model Number | 60-120-K6 |
| Output / Voltage | 120 Amps / 12 Volts |
| Mounting Style | Dual Foot Saddle Mount (3.15" ID) |
| Pulley Type | K6 Serpentine (6-Groove) |
| Grounding | Isolated Ground |
| Compliance | USCG Title 33, ISO 8846, SAE J1171 |
In The Box
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1 x Balmar 60-120-K6 Alternator
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1 x K6 Serpentine Pulley (Pre-installed)
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Isolated Ground Hardware Kit
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Technical Manual & Wiring Diagram
Note on Fitment: This model is the 120 Amp version of the 100 Amp (60-100-SV) we discussed earlier. While the mounts are identical, this unit requires a serpentine belt (K6) to handle the additional load.
The Balmar Alternator 100 Amp 12V Dual Foot Saddle Mount with K6 Pulley & Isolated Grounding – 60-120-K6 is an ideal upgrade for boat owners seeking efficient charging, improved electrical system safety, and proven Balmar reliability.
Manufacturer : Balmar
Manufacturer Part No : 60-120-K6
Balmar Alternator 100 Amp 12V 3.15" Dual foot Saddle Single K6 Pulley with Isolated Grounding - 60-120-K6 is backordered and will ship as soon as it is back in stock.
Balmar Alternator 100 Amp 12V 3.15" Dual foot Saddle Single K6...
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