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

What It Is

The John Deere OEM High Lift Mower Blade Kit (GY20852) is a set of three high-lift blades designed to improve grass clipping discharge and bagging performance on select John Deere lawn tractors. These blades create stronger airflow to lift grass for a cleaner cut and better mulching in tall or damp conditions.

Fitment & Compatibility

• Deck sizes: Fits 42-inch and 48-inch Edge, Accel Deep, and standard cutting decks. Verify your deck model (e.g., 42E, 48D) before purchase.
• Compatible tractors: John Deere 145D, 140, 150, 155C, 160, LA130, LA140, LA145, LA165, X165, and others with GY20852 listed in the manual.
• OEM vs aftermarket: This is genuine John Deere, so fit is exact. Aftermarket blades may vary in thickness or hole alignment.
• Measurements: Blade length is 16.5 inches, center hole diameter 0.75 inches, and thickness 0.1875 inches. Check your existing blade’s length and hole size—non-standard decks may require different blades.

Key Things to Know

• Quality: OEM blades are heat-treated and balanced for durability. They cut cleaner and last longer than most aftermarket options.
• Installation difficulty: Easy—requires a socket wrench and torque to 40-50 ft-lbs. No special tools needed.
• Gotcha: High-lift blades increase engine load and may reduce run time on electric models. They also throw clippings farther, so avoid use near flowerbeds or gravel.
• Maintenance: Replace when blade edge is dull or bent (usually every 1-2 seasons). Sharpen only with a file or grinder; don’t overheat the metal.

Should You Buy It

Buy this kit if you own a compatible John Deere tractor, want OEM reliability, and need better bagging or discharge in thick grass. It’s a premium choice for those who prefer genuine parts over cheaper alternatives and are comfortable with slightly higher engine strain. Skip it if you primarily mulch or have a smaller deck.