8TEN LawnRAZOR mulching mower blades for John Deere 42-inch deck — 2-Pack, 21-7/16" x 2-3/4", 0.1875" thick

These 8TEN LawnRAZOR mulching blades are a direct-fit 2-pack replacement for specific John Deere 42" decks, designed to restore cutting performance and produce finer clippings for healthier-looking lawns.

If your John Deere mower with a 42-inch deck is leaving uneven cuts or struggling to mulch, this pair of 8TEN LawnRAZOR blades matches OEM dimensions and mounting patterns to help bring consistent results back to your mower. Built to the same critical specs as the referenced OEM numbers, the blades are intended to fit a wide range of John Deere models and offer a balance of durability, cutting coverage, and mulching capability.

Will these blades fit my John Deere model?

Yes—these blades are made to replace the OEM part numbers listed for many common John Deere lawn and garden tractors with 42" decks. Confirm your mower uses one of the compatible part numbers or model families to ensure correct fitment.

• Compatible OEM numbers: GX22151, AM137328, AM137333, AM141033, GY20850, AM141031, UC21583
• Fits John Deere models with 42" decks, including D100/E100/LA100/X100 series and select Z and X3xx models
• Measures 21 7/16" length, 2 3/4" width, 0.1875" thickness
• Uses a 7-point star center hole for proper mounting alignment

How do these blades improve cutting and mulching?

The LawnRAZOR blades are profiled to create better airflow beneath the deck, which supports more consistent lifts and finer re-cutting of clippings—key for effective mulching. Thicker steel and a precise edge geometry help maintain sharper cutting surfaces longer, reducing scalloped or jagged finishes.

• Improved cutting consistency for even turf appearance
• Mulching profile designed to finely chop clippings for quicker breakdown
• Robust 0.1875" thickness resists bending under load
• Balanced design reduces vibration and wear on spindles

What are the physical specifications I should check before buying?

Confirm blade length, width, thickness, and center-hole configuration against your existing blades. These dimensions ensure secure mounting and correct clearance inside a 42" deck to avoid contact with deck walls or spindle hardware.

• Blade length: 21 7/16" (edge-to-edge)
• Blade width: 2 3/4" at the widest point
• Thickness: 0.1875" (3/16") for durability
• Center hole: 7-point star pattern to match OEM mounting

How should I install and maintain these replacement blades?

Installation follows standard blade-replacement procedures: disconnect spark plug, remove old blades, match orientation, and torque mounting hardware to the manufacturer’s spec. Regular inspection, sharpening when needed, and tightening hardware will keep blades performing well and prolong deck components.

• Always disconnect the battery/spark plug before service
• Replace blades in matched pairs to maintain balance
• Torque blade bolts to John Deere recommended settings
• Sharpen or replace when cutting performance declines

Who this is for: Homeowners and maintenance professionals who own John Deere lawn tractors or riding mowers with 42" decks and want an OEM-dimension replacement that improves mulching and restores consistent cutting. Choose this 2-pack if you prefer swapping both blades at once for balanced, reliable performance and reduced vibration.