Oregon 91-311 Mulching 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.

ExMark: Lazer XP, Lazer Z

Ferris: 8025

Hustler: Super Z, XR-7, Z

Murray: XR-7

Snapper: 8025, Bahai, Explorer, Laser XP, Laser Z, Turf Ranger

Toro: XR-7

Windsor: Turf Tracer, ZTR

Ariens: 08899100, 08979600, 09081200

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

Bunton-Goodall: PL7441

Cramer: 8100502

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

Dixon: 12421, 12451, 12508, 13368, 13869, 13870, 13921, 13922, 13956, 13957, 13958, 13960, 18931, 539119871, 539129747, 539129775, 9383

ExMark: 1-603283, 1-603874, 1-613111, 1-613112, 1-633483, 103-0301, 103-0301-B, 103-0301-M, 103-0301-S, 103-1580, 103-1580-B, 103-1580-M, 103-1580-S, 103-2510, 103-2510-S, 103-2530, 103-2530-B, 103-2530-M, 103-2530-S, 103-3231, 103-3232, 103-3232-S, 103-3233, 103-3233-S, 103-6338, 103-6338-S, 116-5173-S, 613072, 613111, 613112, 613250, 633483

Gravely: 025124, 046999, 08781800, 08781851, 08898900, 08899100, 089046, 08904651, 08979600, 08979651, 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

J. Thomas: BO-269

Jacobsen: 30227-60X

Landscape Supply: 156290

Mowmore: EX11139, EX20B

Rotary: 10249, 11139, 6290

Stens: 355-105, 355-205, 362-820

Sunbelt: B1EM1800

Toro: 103-0301, 103-0301-S, 105-7715-03, 105-7718-03, 105-7777-03, 105-8777, 105-8777-03, 1057718, 108-1114, 110-0405

Windsor: 50-2810, 50-3251, 50-4211

Woods: 08899100, 08899100CKT, 09246600, 09246600CKT