AT-DF-165-K6-KITXT-Series Alternators
Designed for Recreational Applications

  • 170A or 250A in a Small Case Package
  • Up to 180A at Idle Speeds
  • Patented Smart Ready® Technology
  • Dual Fan Cooling, High Airflow Frame
  • Ideal for Large Battery Banks
  • USCG Title 33, ISO 8846 and SAE J1171 Certified

New XT-Series Alternators from Balmar bring together the latest innovations in alternator design to deliver incredible charging power in a compact, Marine-friendly package.

Advanced Hairpin StatorThe New XT-Series Alternator family features a state-of-the-art, braided stator wire design to generate exceptional output in the smallest possible area. The XT-Series produces slightly more power than our previous AT-Series 165A design and operates 5o-10oC cooler.  In addition, we’ve added Balmar’s Smart Ready® internal regulator technology to provide an additional level of fault tolerance for cruising boaters.  Available XT-Series mounting styles have also expanded to include the “Vortec” 9Si design found on many GM gasoline engines.

XT-Series Alternators feature 96 slots – compared to 36 slots in a traditional S-wound stator – allowing the stator to develop superior electromagnetic energy and efficiency compared to traditional stator designs.  The XT-170 and XT-250 are designed to deliver superior performance at idle speeds – up to 128A and 186A, respectively for 12V applications.

XT-Series Alternators may require a Tachometer Signal Stabilizer (Part No. 15-TSS) if your current tach is not adjustable.  XT-Series Alternators should only be used in Dual Vee or Multi-Groove Serpentine belt configurations. Balmar’s growing range of AltMount® Serpentine Pulley Conversion Kits support all XT-Series Alternators


Take Off



 Individual Alternator 
Part Number(3)(4)(5)


Alternator Kit with
 Max Charge Regulator(1)(4) 


Pulley Kit

 170 A  5.2 HP 1-2″ Single Foot 
    XT-SF-170-DV     XT-SF-170-DV-KIT    


  If a Dual Vee or 
Serpentine Pulley
is Not Already

See the

 XT-SF-170-K6 XT-SF-170-K6-KIT
XT-SF-170-J10 XT-SF-170-J10-KIT
 3.15″ Dual Foot 
XT-DF-170-DV  XT-DF-170-DV-KIT
XT-DF-170-K6  XT-DF-170-K6-KIT
XT-DF-170-J10  XT-DF-170-J10-KIT
Vortec XT-VT-170-K6 XT-VT-170-K6-KIT
 250A 6.6 HP
 1-2″ Single Foot 
    XT-SF-250-DV     XT-SF-250-DV-KIT    
XT-SF-250-K6  XT-SF-250-K6-KIT
 XT-SF-250-J10 XT-SF-250-J10-KIT
3.15″ Dual Foot 
XT-DF-250-DV  XT-DF-250-DV-KIT  
XT-DF-250-K6   XT-DF-250-K6-KIT 
 XT-DF-250-J10 XT-DF-250-J10-KIT 
4″ Dual Foot 
XT-DF4-250-DV   XT-DF4-250-DV-KIT  
XT-DF4-250-K6    XT-DF4-250-K6-KIT 

(1) Kit includes XT-Series or AT-Series Alternator, Max Charge Regulator (MC-618-H) and Temperature Sensors (MC-TS-A, MC-TS-B).
(2) The XT-Series Alternator may require a Tachometer Signal Stabilizer (15-TSS) if your current tachometer is not adjustable.
(3) All Dual Foot Yanmar Kits include the 6-0020 Mounting Kit.
(4) Yanmar Common Rail and newer Volvo engines require the 61-0050K6 pulley.
(5) Yanmar 3YM engines require alternator part number XT-DV-170-K6-3YM