134149 Mulching Blades for 42" Deck, 532134149 Lawn Mower Blades Compatible with Hus-qvarna Pou LAN Craftsman LT1000 LT2000 Riding Mower, Replaces 138971, 422719, 424752, 532422719, 4 Pack

What It Is

This is a set of four mulching blades designed for 42-inch cutting decks, compatible with select Husqvarna, Poulan, and Craftsman riding mowers. They are intended for mulching grass clippings into fine particles to return nutrients to the lawn, rather than bagging or side-discharging.

Fitment & Compatibility

Before buying, verify your mower’s deck size is exactly 42 inches—these blades will not fit 46-inch or 54-inch decks. Confirm your model number from the list: Craftsman LT1000, LT2000 series, or compatible Husqvarna/Poulan models with a 42-inch deck. These blades replace OEM part numbers 138971, 422719, 424752, and 532422719. Measure your existing blade length, width, and center hole diameter (typically 1-inch round or 5-point star) to ensure match. Aftermarket blades may require slight fitment adjustments on some decks.

Key Things to Know

• Quality: Made from heat-treated steel with a hardened edge; generally durable for residential use, but may dull faster than OEM blades on sandy or rocky soil.
• Installation: Straightforward if you have a socket wrench and blade removal tool. Always disconnect the spark plug and lift the deck safely. Torque bolts to 40–50 ft-lbs.
• Balance: Check blade balance after installation—unbalanced blades cause vibration and uneven cuts. Use a blade balancer or simple nail-in-board method.
• Gotcha: These are not universal; double-check your deck’s spindle pattern (3-hole vs 4-hole) and spindle spacing. Some Craftsman decks require an adapter plate for aftermarket blades.

Should You Buy It

If you own a 42-inch deck Craftsman LT1000/LT2000 or compatible Husqvarna/Poulan rider and want an affordable set of four mulching blades for regular residential mowing, this is a solid value. For heavy commercial use or decks with unusual spindle configurations, consider OEM equivalents to avoid fitment issues.