ACEBRI 42'' Mulching Blade for John Deere 42 inch mower blade GX22151 GY20850 AM131033 AM137333 for John Deere S130 Z235 D100 D110 D125 S100 S240 LA100 LA105 LA120 LA135 E100 E120 E130, 2Pck

What It Is

This is a 2-pack of 42-inch mulching blades for John Deere lawn tractors, designed to chop grass clippings finely for nutrient recycling. It replaces OEM part numbers GX22151, GY20850, AM131033, and AM137333.

Fitment & Compatibility

Before buying, confirm your mower deck is exactly 42 inches (measured edge to edge). These blades fit John Deere models: S130, Z235, D100, D110, D125, S100, S240, LA100, LA105, LA120, LA135, E100, E120, E130. Also fits select older models using the same OEM numbers. Measure your blade length (center hole to tip) – it must be 21 inches. Check center hole diameter (typically 7/16" or 1/2") and ensure it matches your spindle. These are aftermarket, not OEM, so verify your deck’s blade orientation (mulching blades often have a curved or notched design).

Key Things to Know

• Quality: Made from heat-treated steel; reviews are limited (5 ratings) but positive. Expect reasonable durability for residential use.
• Installation: Easy with a socket wrench and blade removal tool. Use thread-locker on spindle bolts and torque to 40-50 ft-lbs. Wear gloves.
• Gotcha: Mulching blades work best with a mulching plug/cover installed. They may not discharge clippings well if you switch to bagging without changing blades.
• Gotcha: Check for existing blade damage or bent spindles before installing – new blades won’t fix underlying deck issues.

Should You Buy It

If you own a compatible 42-inch John Deere lawn tractor and want an affordable mulching upgrade for fine clipping recycling, this is a solid choice. It’s not for heavy commercial use, but for residential lawns with regular mowing, the price and positive rating make it worth trying. Avoid if you need high-lift blades for bagging or wet grass.