Aeagle GX20249 GX20433 42 Inch Mulching Mower Blades for John Deere L111 L110 L100 L118 L108 L107 L105 42" Lawn Tractor Replace GY20567 M128485, Circle Shape, 3-in-1, 2 Pack (Black)

What It Is

This is a 2-pack of 42-inch mulching blades for John Deere 100-series lawn tractors (L100, L110, L111, L118, L107, L108, L105) with 42-inch decks. They replace OEM parts GY20567 and M128485, and the circle-shaped, 3-in-1 design allows bagging, mulching, or side discharge.

Fitment & Compatibility

• Deck size must be exactly 42 inches – measure your deck width (blade tip to tip) before buying. These will not fit 38-inch or 48-inch decks.
• John Deere models confirmed: L105, L107, L108, L110, L111, L118, plus some D-series and X-series with 42-inch decks (check your manual). Not for older 100-series or 300-series tractors.
• OEM cross-reference: Replaces GY20567 and M128485. If your current blade has a different number, measure center hole (should be 1 inch) and overall length (42 inches). Aeagle is aftermarket – not OEM, but direct fit for the listed models.
• What to check before ordering: Confirm your deck model (stamped on deck or in manual) and that you need a 42-inch blade set (two blades). Most 42-inch decks use two blades, not three.

Key Things to Know

• Quality & coating: Black powder-coated steel resists rust and holds an edge reasonably well for the price. Expect 1-2 seasons of normal use before sharpening or replacement.
• Installation: Easy swap if you have a socket set and jack or ramps. Torque center bolt to 30-40 ft-lbs. Always disconnect the spark plug and wear gloves – blades are sharp.
• 3-in-1 vs dedicated mulching: The “3-in-1” design works best for mulching if you mow frequently (every 3-4 days). For heavy, wet grass, mulching performance drops – you may need to bag or side discharge.
• Balance: Out of the box, these are usually balanced, but check with a blade balancer. An unbalanced blade vibrates and can damage the spindle.

Should You Buy It

If you own a John Deere L100-series with a 42-inch deck and want an affordable, direct-fit mulching blade that works for standard mowing, this is a solid buy. It’s not a premium blade (expect moderate durability), but at $27.88 for two, it’s a good value for homeowners who mow weekly and don’t need commercial-grade steel. Avoid if you need a dedicated high-lift bagging blade or have a different deck size.