OEM High Lift Mower Blade Kit John Deere 145 D 140 150 155 C 160 LA 130 140 145 165 X 165 GY20852

What It Is

This OEM High Lift Mower Blade Kit (GY20852) is designed for select John Deere lawn tractors to improve grass clipping lift and discharge, especially in thick or wet grass. It’s a direct replacement for original equipment blades, sold as a set of three.

Fitment & Compatibility

Before buying, confirm your mower deck size and model. This kit fits 42-inch and 48-inch decks on these John Deere models: 145, D140, 150, 155, C160, LA130, LA140, LA145, LA165, X165. Check your deck’s blade part number—GY20852 is the OEM number, so cross-reference it with your current blade. Measure blade length (approx. 16.5 inches) and center hole diameter (1 inch) to ensure match. Aftermarket blades may vary, so stick with OEM for guaranteed fit. Also verify your spindle pattern (3-hole, 5.5-inch center-to-center) to avoid compatibility issues.

Key Things to Know

• Quality: OEM blades are thicker and sharper than many aftermarket options, lasting longer under heavy use. Edge retention is good, but high-lift design increases wear on the blade tip.
• Installation Difficulty: Easy for DIY—requires a socket wrench and jack to safely lift the mower. Use a blade removal tool to prevent spinning. Torque bolts to 40-50 ft-lbs.
• Common Gotchas: High-lift blades create more suction, which can bog down the engine in very tall grass. They also throw clippings farther—ideal for bagging but may leave visible trails on lawns if not sharp.
• Set Contents: Includes three blades, but not the mounting hardware (bolts/washers)—reuse old hardware or buy new separately.

Should You Buy It

Buy this kit if you own a compatible John Deere model, want OEM reliability, and need better lift for bagging or mulching in dense grass. It’s a solid upgrade over standard blades for performance, but skip it if your mower struggles with engine power or you prefer low-lift blades for dry, short lawns.