AltMount Serpentine Pulley Conversion Kits

Balmar’s Patented AltMount Serpentine Pulley Kits Facilitate the use of Balmar High Power Alternators
Single Vee pulleys can only support alternator power loads (PTO) of up to 100A for 12V applications (45A for 24V applications). A serpentine pulley provides greater surface contact between the belt and pulley, and thus can accommodate much higher PTO requirements.

• Better Power Transfer
• Reduced Vibration and Belt Dust
• Quieter Motoring

AltMount® Pulley Kits are designed uniquely for each engine, including all the hardware required to complete the installation. The system is installed by placing and fastening a conversion pulley over the existing crank pulley and replacing the water pump pulley. Two serpentine belts are provided with each kit. 

AltMount® Pulley Kits are designed to be used with Balmar 6-Series and XT-Series Alternators.  We cannot guarantee fit with other brands of alternators.   For 95-Series Alternators, use the 48-AM-39 alternator pulley. For 7-Series Alternators, use the 48-AM-102 alternator pulley.  For Hitachi Alternators, use the 48-AM-97 alternator pulley.

Note: Engine manufacturers often make minor changes in their engine platforms which may require minor changes to the AltMount© Kit. Also, a previous boat owner may have made changes to the pulley scheme which must be overcome. As a result, we recommend that every AltMount© Kit be installed by a qualified professional.

Find the correct kit for your engine and view the Balmar installation video.