Oregon 91-144 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.

Ariens: 1340H, 1440 RER, 1440 Sport Zoom, 1440G, 1440H, 1540, 1540H, 1640, 1640H, 1740, 787016, 836003, 915001 (EZR 1440), 915003 (EZR 1540), 915004 (EZR 1440), 915005 (EZR 1540), 915006 (EZR 1640), 915008 (EZR 1540), 915010 (EZR 1540), 915020 (EZR 1540), 915021 (EZR 1740), 915033, 915301 (EZR 1440), 915303 (EZR 1440), 915304 (EZR 1540), 927020 (RM1032), 927065 (1440 RER), 936002 (YT12G), 936003 (YT12H), 936004 (YT15H), 936005 (YT15G), 936008 (LT14G), 936009 (YT13G), 936010 (YT13H), 936011 (YT15G), 936012 (YT15H), 936013 (YT16.5H), 936014 (1340G), 936015 (1440G), 936016 (1340H), 936017 (1440H), 936018 (1540H), 936019 (1640H), 936020 (1640H), 936022 (1340G), 936023 (1540H), 936026 (1540H), 936027 (1640H), 936034 (YT1540), 936302 (LT14G), 936304 (YT16H), 936305 (1440G), 936306 (1440H), 936307 (1640H), 936308 (1440G), 936310 (1540H), 936311 (1640H), 936312 (1540G), 992316 (260H), 992317 (260H), 992321 (272H), 992322 (252H), EZR 1440, Sierra 1340G, YT13G, YT13H, YT14G, YT1540, YT15G, YT15H, YT16.5H, YT16H

Cub Cadet: 3660, GT1500, LT1000, SLT1500, Z-Force

Gravely: 1440 RER, GLT440, Sport ZT1440, ZT1740

MTD: 3660, Z Force

Troy-Bilt: Z Force 60

Ariens: 03607059, 03624700, 03624751, 03624759, 3607059, 36247, 3624751, 3624759

Cub Cadet: 01001805, 01003280, 01003805, 01004719, 01004719-0637, 01004719P, 1004719, 1004719-0637, 742-3042, 759-04013, OCC-01004719

Gravely: 03624700, 03624751

Laser: 91197, 91717

MTD: 01001805, 01003280, 01003805, 01004719, 01004719-0637, 01004719P, 1004719-0637, OCC-01004719

Mowmore: CC10383

Rotary: 10383, 6254

Stens: 305-589, 350-271

Sunbelt: B1CC1421

Windsor: 50-3815

Woods: 03624751, 03624751KT