Tap here to read more about Deck Idler Pulleys for Snapper 460Z 550Z 560Z ZTX550 460Z 500Z Zero-Turn Mower. Premium Quality Replacement Part. Compatible with Snapper Zero-Turn Mower. 400Z (B 2448) (5901275). 400Z (B 2748) (5900528) 48. 400Z (KAV 21548) (5901406) 48. 500Z (B 2648) (5900731). Compatible with Massey Ferguson Zero-Turn Mower. (5900529) (5901253) (5901407) 48. 2 x Deck Idler Pulley. 5102831YP, 5103800YP, 5021976, 5600184, 5600184SM, 5103800. Width : 35 mm – 1.37. Inner Width : 26.5 mm – 1.04. Inner Diameter : 12.6 mm – 0.49. Outer Diameter : 170.5 mm – 6.71.