Main component power transmission, 1 4706-1 extension spring (3/4 x 4) 1, 2 7201-3 du bearing 1 – Briggs & Stratton MB (18 HP) User Manual

Page 62: 3 5830 grease fitting 2, 4 4325 pto belt tightener 1, 5 7201-4 inner race (1-1/2) 1, 6 5841 retainer washer (3/8 x 1-1/4) 1, 7 4245-2 stationary idler arm 1, 8 4245-1 idler pulley (4/flat) 2, 9 4230 engine/pto belt/matched set