The McCormick 3540018M91 is a robust 12-volt, 2.8 kW starter motor designed for reliable engine ignition. Featuring a 10-tooth pinion and clockwise rotation, this genuine OEM starter ensures optimal performance across a wide range of Massey Ferguson, McCormick, and Valtra/Valmet agricultural tractors. It is a direct replacement for various superseded Massey Ferguson part numbers and cross-references with multiple aftermarket brands, ensuring broad compatibility and ease of installation.