Oregon 91-503 Mower Blade

Blade Width: Measure near the center of the blade

Thickness: Measure near the center of the blade

Blade Length: Measured diagonally from the corners of the blade

Center Hole Size: Many blades will have a round hole in the center of the blade and you will need to know its diameter. Blade Length 5 or 7 Point Star Center holes may be 5 or 7 point star shaped. 5 point star on blade7 point star on blade Square or Rectangular The MTD built blades on many walk behind lawn mowers have a 'bow-tie' hole. In this case the Oregon replacement blade will have a rectangular center hole which will fit on the bow-tie pattern on the blade adapter. Square or Rectangular hole on blade MTD Blades The MTD® built blades (Bolens, Cub Cadet, Troy-bilt, White, Yard Machine, and Yardman) may have a 6 point star. Oregon replacement blades will have a 'Y' shaped center hole which will fit exactly on the 6 point star on the blade spindle. 6 point star for MTD blades The two sizes of the 6 point star. If your blade spindle has a bolt and lock washer that holds the blade to the machine you would use the 11/16" star or 'Y' blade. blade spindle with bolt and lock washer. If your blade is secured with a large flange nut then you would use the 5/8" star or 'Y' blade. blade spindle with large flange nut.

OffSet: (Sometimes referred to as offset): If you set the blade on a table this is the distance the center of the blade is above the table top (if any) when the cutting edges are flat on the table.

Air Lift: Air lift is the distance the lift panel rises above the cutting edge.

Dixie Chopper: 3360, 3372, 5018, 5020, 6024, LP3000-60, LP3000-72, LT1800-34, LT1800-44, LT2000-50, LT2000-50D, LT2300-50D, LT2500-44D, LT2500-50D, LT2700-60D, LX2000, LX2000-42, LX2001, LX2001-42, LX2002-42, LX2400, LX2400-42, LX2401, LX2401-42, RT2760, SE2550, SE2750, SE2760HP, SP2800-60, SP2800EFI-60, Whiz-Mow, X2000, X2000-50, X2001-60, X2002-50, X2200-50, X2202-50, X2303-50, X2400, X2400-50, X2500-50, X2502-50, X2503-60, X2703-60, XCD66, XCD74, XF2200-50, XF2200-60, XF2500-60, XF2600EFI-60, XFG2700-50, XFG2700-60, XG2503-50, XG2703-60, XG2703-72, XT3200-60, XT3300-60, XT3300-72, XWD3500-60, XWF2700-60, XWF3000-60, XXG2703-72, XXWD3500-72

Hustler: Super Z, XR-7, Z

Toro: 112947, 78390, 78395, 78445, 78469, 78475, 78476, 78478, C5-50ZS01, C5-50ZS02, C5-50ZS03, C5-60SC02, C5-60SC03, C5-60SC04, C5-60ZS01, C5-60ZS02, C5-60ZS03, Z1-18KE02, Z1-20KE01

Ariens: 08899100, 08979600, 09081200

Bad Boy: 038-2007-00, 038-6002-00, 038-6050-00

Bunton: PL7441

Dixie Chopper: 1057718, 112947, 30227-60, 30227-60E, 30227-60H, 30227-60L, 30227-60N, 30227-60T, 30227-60V, 30227-60X, A30227-60N, A60227-60N

Dixon: 12421, 12451, 12508, 13368, 13869, 13870, 13921, 13922, 13956, 13957, 13958, 13960, 539119871, 9383

ExMark: 1-613112, 1-613250, 1-633483, 103-0301, 103-0301-S, 103-1580-S, 103-2530, 103-2530-B, 103-2530-M, 103-2530-S, 613112, 613250, 633483

Gravely: 025124, 046999, 08781800, 08781851, 08899100, 089046, 08904651, 08979600, 090812, 09081200, 25124, 46999, 48864, 89796, 8979651

Hustler: 600901, 602771, 602771X, 603992, 603992X, 793794, 793794X, 793794Y, 793935, 793935X, 794214, 794214X, 794230, 794230X, 794230Y, 794685, 794685X

Jacobsen: 30227-60X

Landscape Supply: 231007

Mowmore: TO9171

Prime Line: 7-06741

Rotary: 13811, 15009, 9171

Stens: 355-036, 355-036-6

Sunbelt: B1DC1503, B1SB9171

Toro: 105-7715, 105-7715-03, 105-7716, 105-7716-03, 105-7718, 105-7718-03, 105-7777, 105-7777-03, 105-8777, 105-8777-03, 106-8777, 108-1114, 108-1115, 108-1123, 108-1128, 110-0405, 112947, 125-9329-01, 133-2157