Serpentine Alternator Pulley Kit for Westerbeke 13A, 21, 27

Mfr: Balmar

Serpentine Alternator Pulley Kit for Westerbeke 13A, 21, 27
SKU: 488012
Mfg# 48-WSP-21
UNIT: Each
Westerbeke Engine Models: 13A 21 27
Ships from Manufacturer (Typically Ships Out in 1-2 Business Days)


Balmar’s Patented AltMount Serpentine Pulley Kits Facilitate the use of Balmar High Power Alternators

AltMount Pulley Kits on this page are designed uniquely for Westerbeke engines. They include all the hardware required to complete the installation.

The system is installed by placing and fastening each conversion pulley over the existing crank and water pump pulleys. Two serpentine belts are provided with each kit.



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Balmar Limited Warranty covers defects in material or workmanship on new Balmar products generally for a period of two (2) years from the purchase date. Only consumers or dealers purchasing Balmar products from authorized Balmar retailers or resellers and installed by qualified installers may obtain coverage under Balmar’s Limited Warranty.


  • All returns must be recevied within 30 days of receipt of the order.
  • Manufacturer defects reported within 30 days of receipt will be supplied a pre-paid label for return shipping upon approval.
  • Please contact Go2marine LFS Marine and Outdoor for Manufacture Defects, Returns and help with Warranties.