This Alternator is specifically designed for Yanmar marine engines, providing a dependable 12 Volt 55 Amp power supply. It fits a wide range of models including 2GM20, 3JH3E, and 4JH3-TE, ensuring compatibility with various Yanmar applications. This alternator is essential for maintaining the performance of your marine engine, making it a crucial component for any marine enthusiast. Ensure to verify your engine model and old part layout for a perfect fit Cross-Reference Part Numbers: LR155-20, LR15520, LR155-20B, LR15520B, 129772-77200, 12977277200, ALT107, 84150, RA00121, 18-6278, 186278, 125012107, 2GMYE-EC, 3JH3E-YEU, 4JH-DTE, 4JH-HT-E, 4JH-TE, 4JH2-CE, 4JH2-DTE, 4JH2-HTE, 4JH2-TE, 4JH2-UTE, 4JH3-CE, 4JH3-DTE, 4JH3-HTE, 4JH3-TCE, 4JH3-TE-YEU, 4JM-7Z, 4LH-DTE, 4LH-HTE, 4LH-STE, 4LH-TE, 4LHA-DTE, 4LHA-DTZ, 4LHA-HTE, 4LHA-HTZE, 4LHA-STE, 4LHA-STZE, 6PH-HTZY, 6PHM-HTE