Description Switch, Ignition. 6 prongs, includes 2 keys. Tractors: Hydro 84, 354, 454, 464, 484, 574 (prior to s/n 114908), 584, 674, 684, 784, 884, 2300, 2400, 2500 (prior to s/n 114908). This item is a suitable alternative for the following: 529800R91, A-47P9502, A47P9502