John Deere mower blade kit GY20567 — 42" OEM replacement, two blades for L-series decks, balanced factory geometry

The John Deere Original Equipment Mower Blade Kit GY20567 is a two-blade OEM replacement made for 42" decks to restore cutting performance and even grass discharge.

When a mower blade dulls, bends or chips, cut quality and airflow suffer — which leaves your lawn uneven and forces the engine to work harder. This John Deere GY20567 kit contains two factory-fit blades engineered for 42-inch decks used across a range of L-series lawn tractors and compatible brands. Each blade matches John Deere’s original specifications so fitment, balance and cutting geometry stay true to the deck’s design.

Which machines will these blades fit?

These blades are designed for 42-inch decks on many John Deere L-series tractors and several comparable models from other brands. Consult your tractor’s deck size and parts manual to confirm part compatibility before ordering.

• OEM part number: GY20567 — two blades per kit.
• Fits John Deere models: L100 (42"), L105, L107, L108, L110, L111, L118 with 42" decks.
• Also fits compatible decks: SABRE 14.542GS, 1642HS, 17.542HS and select Scotts L-series equivalents.
• Compatible with certain snow-blade and 2-stage snow blower deck configurations listed in the product features.

How do these blades improve cutting and discharge?

Restoring the proper blade profile and sharpness improves the lift and shear action that creates a clean cut and efficient grass ejection. That reduces clumping, improves bagging and helps the mower run with less strain.

• Factory geometry ensures correct air lift for even clippings discharge.
• Balanced blades minimize vibration and spindle wear.
• Sharp, straight edges reduce tearing for a neater lawn appearance.

What should I check before installing these replacement blades?

Verify deck size, mounting hole fit and blade orientation prior to installation. Replace blades in matched pairs where applicable to maintain balance and consistent cut across the deck.

• Confirm deck width is 42" on your tractor or compatible model.
• Inspect spindle hardware and replace worn bolts or washers when fitting new blades.
• Install blades with the cutting edge facing the correct rotation and torque fasteners to spec.

How long will OEM blades like GY20567 last?

Blade life depends on mowing conditions, terrain and maintenance habits. With routine sharpening and avoidance of hard impacts, a typical homeowner blade can remain effective through multiple seasons; heavy use and frequent contact with obstacles will shorten that span.

• Sharpen as needed — frequency varies by grass type and ground debris.
• Avoid rocks, stumps and metal objects to prevent nicks and bends.
• Replace if bent, excessively worn, or if repeated sharpening removes critical blade profile.

Who is this for: The John Deere GY20567 kit is aimed at homeowners and small-property managers who own John Deere L-series tractors or equivalent 42" deck mowers and want an exact-fit, factory-spec replacement. Choose this kit if you need dependable OEM fitment, balanced operation, and improved cut quality over worn or generic blades.