Lawn Boy Spring part# 607528 was used on the governor system of the following lawn mower models; 5084, 5240, 5241, 5242, 5243, 5244, 5245, 5270, 5271, 5272, 5273, 5274, 5275, 7222, 7223, 7224, 7225, 7226, 7227, 7261, 7261E, 7262, 7262E, 7263, 7263E, 7264, 7265, 7266, 8230, 8230E, 8231, 8231E, 8232, 8232E, 8233, 8233AE, 8234, 8234AE, 8235, and 8235AE. There may be models that use this part that we do not have listed here. Please refer to your owners manual or a parts breakdown for your model, to assure that this is the correct part for your machine, before you order.