Balmar XTSF250K6 High Output Marine Alternator 250 Amp 12V Single Foot K6 Serpentine

The Balmar XT-SF-250-K6 is a high-performance 250-amp alternator designed for marine, RV, and powersports applications requiring exceptional charging power in a compact package. This 12-volt alternator features advanced braided stator wire design and delivers superior output, even at low engine speeds.

Advanced XT-Series Technology:

• State-of-the-art braided wire stator with 96 slots (versus 36 in traditional designs) for superior electromagnetic efficiency
• Industry-leading 85% copper winding density for maximum output in minimal space
• Delivers up to 186 amps at idle speeds for 12V applications
• Runs 5-10°C cooler than previous AT-Series designs
• Dual fan cooling system with high airflow frame design
• Smart Ready® internal regulator technology for enhanced fault tolerance

Mounting and Compatibility:

• Single foot spindle mount design (1-2 inch)
• K6 serpentine pulley configuration with case ground
• 1-inch Motorola-style mounting: Compatible with Westerbeke, Lehman, Hino, and Pathfinder engines
• 2-inch Delco-style mounting: Compatible with Volvo Penta (gas and diesel), John Deere, Perkins, Mercruiser, Pleasurecraft, Crusader, Indmar, Marine Power, and other GM-based engines
• Requires dual vee or multi-groove serpentine belt configuration

Certifications and Ratings:

• USCG Title 33, ISO 8846, and SAE J1171 certified for marine applications
• Ideal for lithium battery bank charging systems

This alternator is perfect for vessels and vehicles with high electrical demands, particularly those operating frequently at idle speeds. The XT-Series produces over 100 amps at idle, making it ideal for powersports applications with ballast pumps, high-output audio systems, and multiple instrumentation loads. May require a tachometer signal stabilizer (Part No. 15-TSS) if your current tachometer is not adjustable.