42 Inch Deck 21 Inch Mulching Blades, Lawn Mower Replacement Blades Fit for Craftsman LT Series YT Series, Husqvarna YTH18542 YT150 Poulan Pro, Replaces Part #134149 532134149 422719 424752 2-Pack

What It Is

This is a 2-pack of 42-inch deck, 21-inch mulching blades designed to replace OEM blades on select Craftsman LT/YT series, Husqvarna YTH18542/YT150, and Poulan Pro riding mowers. They cut grass into fine clippings for nutrient recycling, ideal for mulching or bagging.

Fitment & Compatibility

• Deck size: Only fits 42-inch cutting decks. Measure your deck’s underside width to confirm.
• OEM cross-reference: Replaces part numbers 134149, 532134149, 422719, and 424752.
• Brand/model: Compatible with Craftsman LT2000, LT1000, YT3000; Husqvarna YTH18542, YT150; Poulan Pro PPB42, PB42, and similar models. Check your mower’s model plate.
• Aftermarket: Not OEM, but matches OEM dimensions. Verify blade length (21 inches), center hole size (usually 1-inch round), and offset before installing.
• What to check: Measure existing blade length, hole diameter, and thickness. Ensure your deck uses two blades (some 42-inch decks use three).

Key Things to Know

• Installation: Straightforward—remove old blades, clean spindle, install with washers and locknuts (not included). Torque to 70-90 ft-lbs.
• Quality: Heat-treated steel, but some users report thinner metal than OEM. Inspect for balance; if wobbly, replace.
• Mulching performance: Works best with a mulching plug or closed discharge chute. Not ideal for side-discharge or bagging without kit.
• Gotcha: These are low-lift blades. On tall, wet grass, they may clog. Keep blades sharp and cut frequently.

Should You Buy It

Buy if you need a budget-friendly, direct-fit mulching blade for a 42-inch Craftsman, Husqvarna, or Poulan Pro rider and prefer mulching over bagging. Skip if you want OEM-grade durability or need a high-lift blade for heavy, wet grass.