MTD Electric PTO Clutch - 255-347 - Replaces 717-3389/917-3389 255-347 MTD Replacement Electric PTO Clutch Replaces (OEM) MTD 717-3389, 917-3389, and Warner 5210-30 and 5215-68 6" diameter of pulley, 1" inside diameter, 3 1/2" height Rotation is counterclockwise Works with 5/8" belt width