GX22151 GY20850 Mulching Blades Fit for 42 Inch John Deere E120 E130 D110 LA105 LA120 LA135 E100 Mower Decks Replaces AM137333 AM137328 AM141033 (2 Pack)

What It Is

This is a set of two aftermarket mulching blades designed to fit 42-inch cutting decks on popular John Deere lawn tractors, including the E100 series, D110, LA105, LA120, LA135, E120, and E130. They replace OEM part numbers AM137333, AM137328, and AM141033, and are meant for mulching grass clippings into fine particles that decompose quickly.

Fitment & Compatibility

Before buying, verify these three things:

1. Deck size: Your mower must have a 42-inch deck – this will not fit 38-inch or 48-inch decks.
2. Model list: Fits John Deere E100, E120, E130, D110, LA105, LA120, LA135, and similar models with a 42-inch Edge, Econ, or standard deck. Check your owner’s manual for deck model number (e.g., 42E, 42ECON).
3. Measurements: Blade length is 21.75 inches, center hole diameter is 1 inch, and the drive pin hole is 7/16 inch (offset). Measure your old blade to confirm these match – especially the pin hole location, as some John Deere decks use a different pin pattern.

OEM cross-reference: AM137333, AM137328, AM141033. These are aftermarket replacements, not OEM John Deere parts, but they are listed as direct fit for those numbers.

Key Things to Know

• Mulching vs. bagging: These blades have a curved, high-lift design for fine mulching. They will not work well for bagging or side-discharge – use a dedicated blade for those tasks.
• Installation difficulty: Easy – just a socket wrench and a blade removal tool (or a block of wood to hold the blade). Torque the blade bolt to 40-50 ft-lbs (check your deck manual). Do not overtighten.
• Balance: Out of the box, these blades are often well-balanced, but it’s smart to check with a blade balancer before install. An unbalanced blade will cause vibration and damage the spindle.
• Sharpness: They come sharp, but not razor-sharp. Expect to sharpen after 10-15 hours of use for best mulching performance.

Should You Buy It

If you own a 42-inch John Deere lawn tractor in the E100/D100/LA100 series and primarily mulch your grass, this is a solid, budget-friendly replacement for OEM blades. It’s not for bagging or side-discharge, and you must confirm your deck model and pin hole pattern. At ~$31 for two blades, it’s a good value for the price.