Replacement Lawnmower Blade Compatible with Black & Decker CM2040, CM2043C, CM2045, CM2060C, MM2000, Replaces OEM 5140161-49

What It Is

This is a replacement mulching blade set for Black & Decker electric lawn mowers. It fits 20-inch deck models (CM2040, CM2043C, CM2045, CM2060C, MM2000) and replaces OEM part 5140161-49. Designed for mulching grass clippings into fine particles.

Fitment & Compatibility

• Deck size: Only for 20-inch cutting deck mowers. Measure your blade length (should be ~20 inches tip-to-tip).
• Model check: Confirmed fit for CM2040, CM2043C, CM2045, CM2060C, MM2000. Does not fit CM2035 or older 18-inch models.
• OEM vs aftermarket: Aftermarket replacement for OEM 5140161-49. Center hole diameter and offset must match your spindle—verify blade shape (curved mulching vs straight lift) matches your old blade.
• What to measure: Blade length, center hole size (typically 1-inch), and thickness (usually 0.16–0.19 inches). If your current blade has a different hole pattern or offset, this won’t fit.

Key Things to Know

• Quality: 4.6 stars from 53 reviews—most users report good balance and durability. Some note it may require minor balancing out of the box.
• Installation difficulty: Easy swap with a socket wrench. Use thread-locker on the bolt to prevent loosening. Torque to 35–40 ft-lbs.
• Mulching performance: Designed for mulching only—not for bagging or side discharge. Blades are thinner than OEM, so they wear faster on rocky or sandy soil.
• Common gotcha: The blade is not universal—older CM2040s may have a different spindle height. If your mower vibrates after install, recheck balance or swap for OEM.

Should You Buy It

Buy this if you have a listed Black & Decker model and want a budget-friendly mulching blade that performs well for regular lawn maintenance. Skip it if you need a bagging or high-lift blade, or if your mower deck is 18 inches. For heavy-duty or commercial use, stick with OEM.