9PK Oregon 91-531 Mower Blade for 61″ replaces Grasshopper 320245 320243 320242

Product details

Oregon 91-531 Heavy-Duty High-Lift Mower Blade

Part Number Update

Oregon 91-531 has been updated to Oregon 791-531. This is the current Oregon replacement part number.

Replacement Blade for Select 61″ & 42″ Bush Hog, Grasshopper & Woods Mowers

The Oregon 791-531 heavy-duty replacement mower blade is manufactured to exact OEM specifications to provide outstanding cutting performance, durability, and long service life. Each blade is individually straightened and heat-treated to ensure a precise fit, consistent cutting quality, and dependable operation.

Its high-lift design creates aggressive airflow beneath the mower deck, improving bagging performance and producing cleaner side discharge. Designed for commercial mowing applications, the Oregon 791-531 is an excellent replacement for select Bush Hog, Grasshopper, and Woods mower decks.

Product Features

• Genuine Oregon heavy-duty replacement mower blade

• Part Number Update: Oregon 91-531 is now Oregon 791-531

• Manufactured to meet or exceed OEM specifications

• Individually straightened and heat-treated for consistent performance

• High-lift design improves airflow beneath the mower deck

• Provides superior bagging and cleaner side discharge

• Heavy-duty construction for extended service life

• Precision-balanced for smooth operation

Product Specifications

• Product Type: Heavy-Duty High-Lift Mower Blade

• Blade Length: 21″

• Blade Width: 2.50″

• Blade Thickness: 0.250″

• Center Hole: 1/2″

• Offset: 5/16″

• Air Lift: 1″

• Manufacturer: Oregon

• Oregon Part Number: 791-531

Requires (3) blades for a complete 61″ cutting deck
Requires (2) blades for a complete 42″ cutting deck

Major Brand Replacement

• Grasshopper

Fits Models

Bush Hog

• ATH

• ATH600

• ATH720

• FTH

• FTH600

• FTH720

Replaces

Bush Hog

• 88668

Grasshopper

• 320242

• 320243

• 320244

• 320245

• 320245B

• 320246

• 320247

• 320322

• 70134

Woods

• 70134

• 70134KT

• 70142KT

• 72517KT

Verify your mower model number, deck size, center-hole size, and original blade part number before ordering. Some 42-inch and 61-inch cutting decks may use different blade configurations depending on the mower model and production year.

Replaces Grasshopper320242, 320243, 320244, 320245, 320245B, 320246, 320247, 320322, 70134

Part type: mower blade