ILONPA 42" Mulching Mower Blades for John Deere 42-inch Deck — 7‑Point Star, Hardened Steel

These ILONPA 42" 7-point star mulching blades are a direct-fit replacement set engineered to restore cutting performance on compatible John Deere 42" decks.

If your mower’s cut is uneven or mulching performance has dropped, worn or damaged blades are often the cause. This ILONPA blade set matches the 7-point star center hole pattern used by many John Deere models and provides hardened steel construction, factory-applied edge paint for safe handling, and the specific dimensions needed to fit 42" decks. Before installing, verify blade length, width, thickness and the center-star pattern against your mower’s specification to ensure compatibility.

Which John Deere models will these 42" blades fit?

These blades are designed for a wide range of John Deere lawn tractors and zero-turn models that use a 42" deck with a 7-point star mounting pattern. They replace several OEM part numbers and cover many series across residential and light‑duty commercial mowers.

• Replaces OEM: GX22151, AM137328, AM137333, AM141033, GX21694, M149422, and GY20850
• Fits models: 100/110/120/130 series, D100/D105/D110/D120/D125/D130, E100/E110/E120/E130, LA100–LA135 tractors
• Also compatible with: S100–S240, X100–X300 series, X304/X310, X500/X520, Z225/Z235 and select SST models
• Blade dimensions: 21 1/4" length × 2 3/4" width × 0.157" thickness with 7-point star center

How do these blades improve cutting and mulching?

The ILONPA blades are manufactured from hardened steel to hold an edge longer and resist wear, helping produce a cleaner cut and finer clippings for better mulching. The geometry and thickness help maintain deck balance while reducing the need for frequent sharpening.

• Hardened, wear-resistant steel preserves edge sharpness longer
• Consistent thickness and length maintain deck balance and vibration control
• Mulching profile promotes finer clippings for quicker decomposition into the turf
• Factory edge coating prevents rust and protects installers during handling

What should I check before ordering and installing these blades?

Confirm the blade’s physical measurements and the 7-point star center hole pattern on your mower deck before purchasing. Proper torque, blade orientation, and routine balance checks after installation are essential for safe operation and long life.

• Measure blade length (21 1/4"), width (2 3/4") and thickness (0.157")
• Verify your mower uses a 7-point star center mounting hole
• Wear gloves and follow manufacturer torque specs during installation
• Run briefly, then recheck mounting bolts and blade balance

How long will these replacement blades last and what maintenance is required?

Service life varies by lawn conditions, terrain and usage frequency; the hardened steel construction offers extended edge life compared with basic blades. Sharpening, cleaning, and seasonal inspection will maximize performance and safety.

• Expect longer edge retention under normal residential use
• Sharpen or replace when nicks or excessive dulling occur
• Keep blades clean and free of sap or debris to reduce corrosion
• Repainted cutting edge will wear off quickly during first use—this is intentional

Who is this for? Homeowners and property managers who maintain 42" John Deere decks and want a reliable, direct-fit mulching blade replacement that restores cut quality and improves mulching. It’s a practical choice for anyone replacing OEM 7-point star blades or upgrading worn edges on residential lawn tractors and compatible zero-turn mowers.