134149 Mulching Blades for Craftsman 42 inch Mower Blade LT2000 LT1000 YS4500 Replace 422719 532134149 Husqvarna Poulan Pro 42'' Deck Riding Lawn Mower 5 Point Star (2 Pack)

What It Is

This 2-pack of 42-inch mulching blades is designed for Craftsman, Husqvarna, and Poulan Pro riding mowers with a 5-point star center hole. They replace OEM part numbers 134149, 422719, and 532134149, and are intended for mulching grass clippings into fine particles that decompose back into the lawn.

Fitment & Compatibility

Deck size: Only fits 42-inch cutting decks. Measure your deck width before buying.

Model fit: Compatible with Craftsman LT1000, LT2000, YS4500, and many Husqvarna/Poulan Pro models using a 5-point star (spline) blade mount. Not for standard center hole or oval hole mounts.

OEM vs aftermarket: These are aftermarket blades. Check that your current blade has the same part number (134149 or 422719) stamped on it.

Measurements: Blade length must be 21 inches (center-to-tip). Center hole is 5-point star, 1-inch diameter. Blade thickness is typically 0.25 inches. Confirm these match your existing blade.

What to check: Verify your mower deck uses a star-shaped spindle (not a round or keyed spindle). If your blade has a round center hole, these won’t fit.

Key Things to Know

• Installation difficulty: Easy—requires a socket wrench and a blade removal tool or block of wood to prevent spinning. Torque to 70-90 ft-lbs.
• Mulching quality: Works best with high-lift design to recut clippings. Expect finer discharge than standard blades, but wet grass may still clump.
• Gotcha: The 5-point star pattern is specific to certain Craftsman/Husqvarna spindles. Double-check by removing one existing blade and comparing the center hole shape.
• Balance: Aftermarket blades may need balancing before installation. Use a blade balancer to avoid vibration and spindle wear.

Should You Buy It

Buy if you have a 42-inch Craftsman LT1000/LT2000 or compatible Husqvarna/Poulan Pro with a 5-point star spindle and want to improve mulching performance. Skip if your deck is a different size, uses a round or oval center hole, or if you only need standard discharge blades. With only 2 reviews, proceed cautiously—verify fitment by measuring your current blade.