Balmar 48YSP4LHA AltMount Serpentine Pulley Conversion Kit for Yanmar 4LH-A

The Balmar 48YSP4LHA AltMount Serpentine Pulley Conversion Kit provides an easily-installed solution for upgrading your Yanmar 4LH-A marine diesel engine to a more efficient serpentine belt system. This conversion kit enables better power transfer, reduced engine vibration and belt dust, and quieter operation compared to traditional single V-belt systems.

Key Features:

• Designed specifically for Yanmar 4LH-A marine diesel engines
• Three ten-groove (J10) serpentine pulleys for improved load distribution
• Two J10 serpentine belts with 47-inch circumference (includes one spare belt)
• Complete mounting hardware included for straightforward installation
• Facilitates use of high-output Balmar alternators up to 200 amps
• Significantly reduces belt noise and vibration during operation

This AltMount pulley conversion kit is essential when upgrading to higher capacity alternators, as traditional single V-belt pulleys can only support alternator loads up to 100 amps for 12V applications. The serpentine belt system provides superior grip and power transfer while extending belt life and reducing maintenance requirements.

Note: If installing an AT-200A alternator, a longer belt length may be required. Contact Balmar technical support for specific belt sizing recommendations for your alternator configuration.