Grasscool 21 inch Mower Mulching Blades Replace Troy Bilt 942-0741A for TB110 TB230 TB240 TB130 TB210 TB320 TB220 TB280ES 21" Deck Lawn Tractor 742-0741A

What It Is

This is a set of 21-inch mulching blades designed to replace Troy-Bilt OEM part 942-0741A (also 742-0741A). They fit select Troy-Bilt push mowers with a 21-inch cutting deck, cutting grass into fine clippings for natural lawn fertilization.

Fitment & Compatibility

• Deck size: Must be exactly 21 inches. Measure your deck before buying—any other size won’t fit.
• Models confirmed work: TB110, TB130, TB210, TB220, TB230, TB240, TB280ES, and TB320. But always double-check your model number on the mower’s sticker under the seat or on the frame.
• OEM replacement: Direct swap for Troy-Bilt 942-0741A and 742-0741A. No adapters needed.
• Measurements: Blade length 21 inches, center hole 1 inch, offset 0.75 inches. Verify these match your current blade.
• Check before buying: Look up your mower’s model number (e.g., TB230) and confirm the OEM part number on the old blade (usually stamped on the blade itself).

Key Things to Know

• Quality: Made from heat-treated steel, similar to OEM. Reviews note good durability for residential use, but not for heavy commercial mowing.
• Installation: Easy—remove the old blade (disconnect spark plug first), align the new one with the center hole, and tighten to 35-45 ft-lbs. Use a torque wrench if possible.
• Common gotcha: These are mulching blades, not standard lift blades. They produce finer clippings but may clog in wet or tall grass. Swap to side-discharge if needed.
• Balance: New blades are pre-balanced, but check with a blade balancer after installation—vibration can damage the spindle.

Should You Buy It

Yes, if you own a compatible Troy-Bilt 21-inch push mower and want a budget-friendly, well-reviewed mulching blade that matches OEM specs. Skip it if you need a high-lift blade for bagging or have a commercial mower—look for heavier-duty options.