8TEN LawnRAZOR Mower Blade Set for John Deere Scotts L100 L105 L110 42 inch Deck GX20249 GY20567 GX20433 (Mulching)

What It Is

The 8TEN LawnRAZOR Mower Blade Set is a set of three mulching blades designed to fit 42-inch cutting decks on specific John Deere and Scotts lawn tractors. These blades replace OEM part numbers GX20249, GY20567, and GX20433, aiming to chop grass clippings finely for nutrient recycling on your lawn.

Fitment & Compatibility

Before buying, confirm your mower deck measures exactly 42 inches (not 38, 46, or 48). This set fits John Deere L100, L105, L110, L111, L118, L120, L130, and Scotts L1742, L2048, and L2548 models with a 42-inch stamped deck. Check your current blade part number—if it’s GX20249, GY20567, or GX20433, these are direct replacements. Measure the blade length: these are 21 inches long, with a 1-inch center hole and a 0.875-inch star-shaped center hole. Not compatible with older 42-inch decks using a 7/8-inch round center hole or 20-inch blades. Verify your deck’s spindle pattern—this set uses three blades, not two.

Key Things to Know

• Material & build: Made from heat-treated steel with a black powder coating; sharp out of the box but not as thick as OEM John Deere blades—expect slightly shorter lifespan under heavy use.
• Installation: Moderate difficulty—requires a socket wrench and blade removal tool. Torque blades to 70-90 ft-lbs. The star-shaped center hole fits some spindles tightly; file lightly if needed.
• Mulching performance: Works best with dry, short grass (under 3 inches). Wet or tall grass may clump under the deck—use a side-discharge kit for those conditions.
• Common gotcha: Blade bolts often seize on these models—apply penetrating oil before removal. Confirm the washer orientation (cupped side toward blade).

Should You Buy It

Buy this set if you own a 42-inch deck John Deere or Scotts lawn tractor listed above, want affordable mulching blades for regular dry-season mowing, and are comfortable with basic installation. Skip it if you need heavy-duty bagging blades, have a non-standard deck, or prefer thicker OEM steel for rocky terrain.