Pulley Kit for Yanmar 3JH5, 3JH4-E, 4JH4-E, 4JH5, 4JH5-E AltMount® Serpentine Pulley Conversion Kit for Yanmar Diesel Engines Yanmar Engines Covered: 3JH5, 3JH4-E, 4JH4-E, 4JH5 Kit Includes: Three Ten-Groove (J10) Pulleys, Two J10, 44.5″ Circumference Serpentine Belts (one spare) & Mounting Hardware Note:  If you specify an AT-200A Alternator, a longer belt length may be required. This product may not be returned to the original point of purchase. Please contact the manufacturer directly with any issues or concerns.