The Kubota 1861003870 is a genuine OEM starter switch designed for reliable ignition control across a wide range of Kubota agricultural and utility tractors. This essential electrical component ensures proper starting functionality for models including B1550, L2250, M4030, and MX5000 series. Measuring approximately 95 mm in length, 51 mm in width, and 51 mm in height, and weighing about 0.11 kg, it provides a direct fit and optimal performance for compatible Kubota machinery.