ILONPA GY20852 48 inch 7-Star Mulching Blades for John Deere GX21784 D140 E140 D160 E150 E160 E170 LA145 LA140 LA155 155C 48" Decks 100 Series Tractor Zero Turn Mower GX21785 AM137757 2-Pack, Blue

What It Is

The ILONPA GY20852 2-pack of 48-inch 7-star mulching blades is an aftermarket replacement designed for John Deere 100 Series tractors and select zero-turn mowers with 48" decks. They cut grass into fine clippings for nutrient recycling, ideal for regular mulching on medium-to-large lawns.

Fitment & Compatibility

• Deck size: Must be exactly 48 inches. Measure your deck width from blade tip to tip.
• Model fit: Confirmed for John Deere D140, E140, D160, E150, E160, E170, LA145, LA140, LA155, 155C, and 100 Series tractors. Also fits GX21784, GX21785, AM137757, and GY20852 OEM part numbers.
• Zero-turn: Works on select John Deere zero-turn mowers with 48" decks—check your model’s blade length and center hole size (typically 7/8" or 1").
• Aftermarket note: Not OEM John Deere. Verify blade length (48" total, but measure center-to-center of mounting holes and overall width) and bolt pattern matches your spindle.

Key Things to Know

• Mulching performance: 7-star design creates fine clippings but requires dry, short grass (under 4") for best results. Avoid thick, wet grass to prevent clumping.
• Installation: Moderate difficulty. Requires a torque wrench (50-60 ft-lbs) and blade lifters or a block to secure the deck. Sharp edges—wear gloves.
• Durability: Heat-treated steel holds an edge longer than cheap blades, but may need sharpening after 10-15 hours of heavy use. Not for bagging or side-discharge.
• Balance check: Always balance new blades after installation to avoid vibration and spindle wear. Use a simple blade balancer.

Should You Buy It

Buy these if you own a John Deere 100 Series or compatible 48" deck mower and primarily mulch grass on a regular schedule. They’re a cost-effective alternative to OEM blades with solid mulching performance for the price. Avoid if you need a universal fit or mostly bag/side-discharge.