John Deere Original Equipment Mower Blade Kit #AM141039

What It Is

The John Deere Original Equipment Mower Blade Kit #AM141039 is a set of two genuine OEM blades designed for 42-inch and 48-inch cutting decks on select John Deere lawn tractors and zero-turn mowers. These blades are for medium-duty residential mowing, not heavy commercial use.

Fitment & Compatibility

Before buying, verify your deck size—this kit fits 42-inch and 48-inch decks, but not 54-inch or larger. Check your model against John Deere’s official list: compatible with D100, D110, D120, D125, D130, D140, D150, D155, D160, D170, X300, X304, X310, X320, X324, X330, X340, X350, X360, X370, X380, X390, Z225, Z235, Z245, Z255, Z425, Z435, Z445, Z465, Z525E, Z535M, Z545R, Z555R, Z560L, Z565R, Z665R, Z925A, Z930A, Z950A, Z955A, Z960A, Z970A, Z980A, Z990A, and Z995A. Measure your existing blade length: this kit’s blades are 20.5 inches long with a 1-inch center hole and a 0.5-inch offset. If your blade length, hole size, or offset differs, it won’t fit. This is an OEM part, so it matches John Deere factory specs exactly—aftermarket blades may require different measurements.

Key Things to Know

• Quality: Made from heat-treated boron steel for durability and a clean cut. OEM blades are sharper and last longer than many aftermarket options, but they’re not designed for mulching or bagging—these are standard lift blades.
• Installation: Easy with basic tools (socket wrench and torque wrench). Use a blade removal tool to hold the blade; torque bolts to 70-90 ft-lbs. No special adapters needed.
• Common Gotchas: These blades are for 42/48-inch decks only—don’t assume they fit all John Deere models. Also, they come as a pair, not a single blade, so check if you need one or two. Replace blades every 25 hours of use or when dull to avoid tearing grass.
• Safety: Disconnect the spark plug before installing. Wear gloves to avoid cuts.

Should You Buy It

Buy this kit if you own a compatible John Deere 42-inch or 48-inch deck and want a reliable, OEM-quality blade for standard cutting. It’s a solid choice for residential mowing where you need consistent performance without paying extra for commercial-grade blades. Skip it if you need mulching or bagging blades, or if you have a different deck size—aftermarket options may be cheaper but won’t match OEM fit.