The Hitachi 12921177920 Glow Timer is a genuine OEM component, also cross-referenced as Yanmar 129211-77920. This 12V timer precisely controls the preheating cycle of glow plugs, ensuring reliable cold starts and optimal engine performance. It is compatible with various Yanmar engines (3TNV70, 3TNV76, 4TNV84T, 4TNV88, 4TNV94L, 4TNV98, 4TNV98T, 4TNV106, 4TNV106T) and is used in specific John Deere compact utility tractors (2025R, 2032R, 2036R, 2038R, 3025E, 3032E, 3033R, 3038E, 3039R, 3045R, 3046R, 17G, 26G, 30G, 35G, 50G, 60G) and Hitachi excavators (ZX17U-2, ZX27U-2, ZX30U-2, ZX35U-2, ZX40U-2, ZX50U-2, ZX50U-3, ZX50U-5A, ZX50U-5N, ZX50U-6, ZX50U-6A, ZX50U-6N). Weighing 0.15 kg, with dimensions of 95mm length, 51mm width, and 30mm height, this timer is built for durability and precise function.