Balmar Alternator 1-2" Single Foot J10 Serpentine Pulley Regulator & Temp Sensor - 170A Kit - 12V - XT-SF-170-J10-KIT
Manufacturer Part #: XT-SF-170-J10-KIT
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Balmar Alternator Kit 170 Amp 12V Single Foot with J10 Pulley, Regulator & Temp Sensor – XT-SF-170-J10-KIT
The Balmar Alternator Kit – 170 Amp, 12 Volt (XT-SF-170-J10-KIT) is a complete, high-output marine charging system designed for boats with advanced electrical demands and large house battery banks. Featuring a 1–2” single-foot mount, J10 serpentine pulley, external smart voltage regulator, and temperature sensors, this kit delivers intelligent, efficient, and reliable charging performance for cruising, offshore, and performance vessels.
Built for continuous-duty marine operation, the 170-amp alternator delivers strong charging output at cruising RPMs, ensuring reliable power for inverters, refrigeration, navigation electronics, lighting, and other onboard systems. The single-foot mounting configuration provides broad engine compatibility while maintaining a compact installation footprint.
The J10 serpentine pulley offers increased belt contact area for maximum torque transfer, reduced slippage, and improved durability—ideal for high-output alternator applications. The included smart external regulator enables advanced multi-stage charging, optimizing performance and extending battery life for AGM, gel, and lithium battery systems (with proper configuration). Alternator and battery temperature sensors protect the system by automatically adjusting output to prevent overheating and overcharging.
Constructed with marine-grade, corrosion-resistant materials, Balmar alternators are trusted by professional installers and long-range cruisers worldwide for their durability, thermal efficiency, and reliable performance in harsh saltwater environments.
Key Performance Features
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170 Amp XT-Series Alternator: Delivers massive 12V charging power in a compact frame, ideal for tight engine compartments.
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J10 Serpentine Pulley: Features a 10-groove "J" profile pulley for maximum surface contact, virtually eliminating belt slippage and "dusting" under heavy electrical loads.
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MC-618 Smart Regulator: Provides 100% programmable multi-stage charging with specific profiles for Lithium, AGM, Gel, and Flooded batteries.
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Single Foot (Spool) Mount: Comes as a 1" mount with a 2" spacer kit, making it a direct replacement for many Delco, Motorola, and Mercruiser style alternators.
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Thermal Intelligence: Includes dual temperature sensors that monitor the alternator and battery bank to prevent heat damage during long charging cycles.
Technical Specifications
| Feature | Details |
| Model Number | XT-SF-170-J10-KIT |
| Output / Voltage | 170 Amps / 12 Volts |
| Mounting Style | 1" or 2" Single Foot (Spool) |
| Pulley Type | J10 Serpentine (10-Groove) |
| Regulation | External MC-618 (Included) |
| Grounding | Case Ground |
| Best For | Large Lithium Banks & High-Load Trawlers/Sailboats |
In The Box
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1 x Balmar XT-170 Alternator (Single Foot Mount)
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1 x J10 Serpentine Pulley (Pre-installed)
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1 x MC-618 Multi-Stage Smart Regulator
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1 x Alternator Temperature Sensor (MC-TS-A)
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1 x Battery Temperature Sensor (MC-TS-B)
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1 x 1" to 2" Spool Spacer Kit
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Wiring Harness & Detailed Installation Manuals
The Balmar Alternator 1–2” Single Foot J10 Serpentine Pulley Regulator & Temp Sensor – 170A Kit – 12V – XT-SF-170-J10-KIT is an ideal turnkey solution for boat owners seeking maximum charging power, intelligent regulation, and long-term Balmar reliability.
Balmar Alternator 1-2" Single Foot J10 Serpentine Pulley Regulator & Temp Sensor - 170A Kit - 12V - XT-SF-170-J10-KIT is backordered and will ship as soon as it is back in stock.
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