1 x Ignition lock / ignition lock / start switch for ride-on mower / lawn tractor. 3 Position / 5 Pin. MT 540, MT 545, MT 545 L, MT 580, MT 585, MT 585 L, MT 640, MT 680, MT 740. ESTATE 6102 H, ESTATE 6102 HW, ESTATE 6122 HW, ESTATE 7122 HWS, ESTATE BASIC, ESTATE COLLECTOR, ESTATE MASTER, ESTATE MASTER HST, ESTATE PRESIDENT, ESTATE PRESIDENT H, ESTATE PRESIDENT K, ESTATE PRO 20, ESTATE PRO 22, ESTATE PRO 22 E, ESTATE PRO 22 K, ESTATE ROYAL, ESTATE ROYAL E, ESTATE ROYAL H, ESTATE ROYAL K, ESTATE SENATOR, ESTATE SENATOR, ESTATE SENATOR K, ESTATE SENATOR K, ESTATE TORNADO, EL365.