91-539 Mulching Blade
91-539 Mulching Blade
91-539 Mulching Blade is a replacement mower blade with a mulching-oriented profile that recuts clippings while maintaining airflow. Match the complete part number, mounting pattern, dimensions, and equipment configuration before ordering.
Purpose and Value
A worn, bent, or incorrect blade can leave uncut strips, tear grass, increase vibration, and reduce discharge quality. Correct geometry helps restore an even cut and limits avoidable spindle and deck vibration.
Verified Supplier Specifications
| Blade length | 21" |
|---|---|
| Blade width | 2.50" |
| Thickness | 0.203" |
| Center hole | 1/2" |
| Offset | 0 |
| Air lift | 1" |
Supplier-Verified Application Details
Center hole: 1/2" Requires 3 blades for 61" cut Requires 2 blades for 41" cut Superior mulching for bagging and discharge efficiency Enhanced hardening to keep the blade sharper and more durable Replaces major brands: Grasshopper, Woods, and Bush Hog
Supplier Replacement Reference
Replaces major brands: Grasshopper, Woods, and Bush Hog SPECIFICATIONS, DETAILS & SUPPORT Blades Blade Width 2.50" Thickness 0.203" Blade Length 21" Center Hole Size 1/2" OffSet 0 Air Lift 1" General Color Black Volume 60.06 in³ Product UOM Each Weight (with Packaging) 2.85 Lb Product Height 0.203 Product Length 21" Product Width 2.5 MODEL FIT GUIDE AND PARTS CROSS REFERENCE Fit Guide BUSH HOG Replacement Guide BUSH HOG GRASSHOPPER J THOMAS SUNBELT WOODS
Deck quantity guidance: Requires 3 blades for 61" cut Requires 2 blades for 41" cut Superior mulching for bagging and discharge efficiency Enhanced hardening to keep the blade sharper and more durable Replaces maj. Confirm the exact deck configuration before ordering.
What One Purchase Includes
One blade. Multi-blade decks require the quantity stated for the exact deck.
Fitment Safeguard
Verify the complete OEM or replacement number, mower or engine model, serial range, deck size, mounting pattern, orientation, and required quantity. Similar-looking parts can differ in offset, rotation, hole pattern, thread, connector, or other critical details.
Installation and Service
No product-specific installation manual was verified in the supplier record. Follow the equipment manufacturer's procedure. For blades, stop the engine, remove the key, disconnect the spark-plug lead, secure the blade, wear cut-resistant gloves, install in the correct orientation, and torque hardware to the equipment manufacturer's specification.