The McCormick 4219057M91 is a genuine starter switch designed for reliable ignition in agricultural machinery. This essential electrical component features 4 terminals, ensuring proper connection and function. It is a direct replacement for original equipment, compatible with a wide range of McCormick C, CX, MC, MTX, XTX, ZTX series tractors, as well as numerous Massey Ferguson models including the 300, 400, 500, 600, 3000, 4200, 4300, 5400, 6100, 6200, 6400, 7400, 8100, and 8200 series. This OEM quality part ensures optimal performance and durability.