Balmar AltMount Serpentine Pulley Kit – Yanmar
This AltMount serpentine pulley kit fits Yanmar 3YM20, 2YM-15 marine diesel engines. It allows you to install a high output marine alternator in the alternator original position. These kits are the ideal upgrade for serious cruisers and others looking to maximize their charging capacity delivered by their main engine.
AltMount®Serpentine Pulley Conversion Kit for Yanmar Diesel Engines
Yanmar Engines Covered: 3YM20, 2YM-15
Kit Includes: Three Ten-Groove (J10) Pulleys, Two J10, 40″ Circumference Serpentine Belts (one spare) & Mounting Hardware
Note: If you specify an AT-200A Alternator, a longer belt length may be required.